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1 /** 2 * @license 3 * Lodash <https://lodash.com/> 4 * Copyright OpenJS Foundation and other contributors <https://openjsf.org/> 5 * Released under MIT license <https://lodash.com/license> 6 * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE> 7 * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors 8 */ 9 ;(function() { 10 11 /** Used as a safe reference for `undefined` in pre-ES5 environments. */ 12 var undefined; 13 14 /** Used as the semantic version number. */ 15 var VERSION = '4.17.19'; 16 17 /** Used as the size to enable large array optimizations. */ 18 var LARGE_ARRAY_SIZE = 200; 19 20 /** Error message constants. */ 21 var CORE_ERROR_TEXT = 'Unsupported core-js use. Try https://npms.io/search?q=ponyfill.', 22 FUNC_ERROR_TEXT = 'Expected a function'; 23 24 /** Used to stand-in for `undefined` hash values. */ 25 var HASH_UNDEFINED = '__lodash_hash_undefined__'; 26 27 /** Used as the maximum memoize cache size. */ 28 var MAX_MEMOIZE_SIZE = 500; 29 30 /** Used as the internal argument placeholder. */ 31 var PLACEHOLDER = '__lodash_placeholder__'; 32 33 /** Used to compose bitmasks for cloning. */ 34 var CLONE_DEEP_FLAG = 1, 35 CLONE_FLAT_FLAG = 2, 36 CLONE_SYMBOLS_FLAG = 4; 37 38 /** Used to compose bitmasks for value comparisons. */ 39 var COMPARE_PARTIAL_FLAG = 1, 40 COMPARE_UNORDERED_FLAG = 2; 41 42 /** Used to compose bitmasks for function metadata. */ 43 var WRAP_BIND_FLAG = 1, 44 WRAP_BIND_KEY_FLAG = 2, 45 WRAP_CURRY_BOUND_FLAG = 4, 46 WRAP_CURRY_FLAG = 8, 47 WRAP_CURRY_RIGHT_FLAG = 16, 48 WRAP_PARTIAL_FLAG = 32, 49 WRAP_PARTIAL_RIGHT_FLAG = 64, 50 WRAP_ARY_FLAG = 128, 51 WRAP_REARG_FLAG = 256, 52 WRAP_FLIP_FLAG = 512; 53 54 /** Used as default options for `_.truncate`. */ 55 var DEFAULT_TRUNC_LENGTH = 30, 56 DEFAULT_TRUNC_OMISSION = '...'; 57 58 /** Used to detect hot functions by number of calls within a span of milliseconds. */ 59 var HOT_COUNT = 800, 60 HOT_SPAN = 16; 61 62 /** Used to indicate the type of lazy iteratees. */ 63 var LAZY_FILTER_FLAG = 1, 64 LAZY_MAP_FLAG = 2, 65 LAZY_WHILE_FLAG = 3; 66 67 /** Used as references for various `Number` constants. */ 68 var INFINITY = 1 / 0, 69 MAX_SAFE_INTEGER = 9007199254740991, 70 MAX_INTEGER = 1.7976931348623157e+308, 71 NAN = 0 / 0; 72 73 /** Used as references for the maximum length and index of an array. */ 74 var MAX_ARRAY_LENGTH = 4294967295, 75 MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1, 76 HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1; 77 78 /** Used to associate wrap methods with their bit flags. */ 79 var wrapFlags = [ 80 ['ary', WRAP_ARY_FLAG], 81 ['bind', WRAP_BIND_FLAG], 82 ['bindKey', WRAP_BIND_KEY_FLAG], 83 ['curry', WRAP_CURRY_FLAG], 84 ['curryRight', WRAP_CURRY_RIGHT_FLAG], 85 ['flip', WRAP_FLIP_FLAG], 86 ['partial', WRAP_PARTIAL_FLAG], 87 ['partialRight', WRAP_PARTIAL_RIGHT_FLAG], 88 ['rearg', WRAP_REARG_FLAG] 89 ]; 90 91 /** `Object#toString` result references. */ 92 var argsTag = '[object Arguments]', 93 arrayTag = '[object Array]', 94 asyncTag = '[object AsyncFunction]', 95 boolTag = '[object Boolean]', 96 dateTag = '[object Date]', 97 domExcTag = '[object DOMException]', 98 errorTag = '[object Error]', 99 funcTag = '[object Function]', 100 genTag = '[object GeneratorFunction]', 101 mapTag = '[object Map]', 102 numberTag = '[object Number]', 103 nullTag = '[object Null]', 104 objectTag = '[object Object]', 105 promiseTag = '[object Promise]', 106 proxyTag = '[object Proxy]', 107 regexpTag = '[object RegExp]', 108 setTag = '[object Set]', 109 stringTag = '[object String]', 110 symbolTag = '[object Symbol]', 111 undefinedTag = '[object Undefined]', 112 weakMapTag = '[object WeakMap]', 113 weakSetTag = '[object WeakSet]'; 114 115 var arrayBufferTag = '[object ArrayBuffer]', 116 dataViewTag = '[object DataView]', 117 float32Tag = '[object Float32Array]', 118 float64Tag = '[object Float64Array]', 119 int8Tag = '[object Int8Array]', 120 int16Tag = '[object Int16Array]', 121 int32Tag = '[object Int32Array]', 122 uint8Tag = '[object Uint8Array]', 123 uint8ClampedTag = '[object Uint8ClampedArray]', 124 uint16Tag = '[object Uint16Array]', 125 uint32Tag = '[object Uint32Array]'; 126 127 /** Used to match empty string literals in compiled template source. */ 128 var reEmptyStringLeading = /\b__p \+= '';/g, 129 reEmptyStringMiddle = /\b(__p \+=) '' \+/g, 130 reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g; 131 132 /** Used to match HTML entities and HTML characters. */ 133 var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g, 134 reUnescapedHtml = /[&<>"']/g, 135 reHasEscapedHtml = RegExp(reEscapedHtml.source), 136 reHasUnescapedHtml = RegExp(reUnescapedHtml.source); 137 138 /** Used to match template delimiters. */ 139 var reEscape = /<%-([\s\S]+?)%>/g, 140 reEvaluate = /<%([\s\S]+?)%>/g, 141 reInterpolate = /<%=([\s\S]+?)%>/g; 142 143 /** Used to match property names within property paths. */ 144 var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/, 145 reIsPlainProp = /^\w*$/, 146 rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g; 147 148 /** 149 * Used to match `RegExp` 150 * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns). 151 */ 152 var reRegExpChar = /[\\^$.*+?()[\]{}|]/g, 153 reHasRegExpChar = RegExp(reRegExpChar.source); 154 155 /** Used to match leading and trailing whitespace. */ 156 var reTrim = /^\s+|\s+$/g, 157 reTrimStart = /^\s+/, 158 reTrimEnd = /\s+$/; 159 160 /** Used to match wrap detail comments. */ 161 var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/, 162 reWrapDetails = /\{\n\/\* \[wrapped with (.+)\] \*/, 163 reSplitDetails = /,? & /; 164 165 /** Used to match words composed of alphanumeric characters. */ 166 var reAsciiWord = /[^\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f]+/g; 167 168 /** Used to match backslashes in property paths. */ 169 var reEscapeChar = /\\(\\)?/g; 170 171 /** 172 * Used to match 173 * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components). 174 */ 175 var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g; 176 177 /** Used to match `RegExp` flags from their coerced string values. */ 178 var reFlags = /\w*$/; 179 180 /** Used to detect bad signed hexadecimal string values. */ 181 var reIsBadHex = /^[-+]0x[0-9a-f]+$/i; 182 183 /** Used to detect binary string values. */ 184 var reIsBinary = /^0b[01]+$/i; 185 186 /** Used to detect host constructors (Safari). */ 187 var reIsHostCtor = /^\[object .+?Constructor\]$/; 188 189 /** Used to detect octal string values. */ 190 var reIsOctal = /^0o[0-7]+$/i; 191 192 /** Used to detect unsigned integer values. */ 193 var reIsUint = /^(?:0|[1-9]\d*)$/; 194 195 /** Used to match Latin Unicode letters (excluding mathematical operators). */ 196 var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g; 197 198 /** Used to ensure capturing order of template delimiters. */ 199 var reNoMatch = /($^)/; 200 201 /** Used to match unescaped characters in compiled string literals. */ 202 var reUnescapedString = /['\n\r\u2028\u2029\\]/g; 203 204 /** Used to compose unicode character classes. */ 205 var rsAstralRange = '\\ud800-\\udfff', 206 rsComboMarksRange = '\\u0300-\\u036f', 207 reComboHalfMarksRange = '\\ufe20-\\ufe2f', 208 rsComboSymbolsRange = '\\u20d0-\\u20ff', 209 rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange, 210 rsDingbatRange = '\\u2700-\\u27bf', 211 rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff', 212 rsMathOpRange = '\\xac\\xb1\\xd7\\xf7', 213 rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf', 214 rsPunctuationRange = '\\u2000-\\u206f', 215 rsSpaceRange = ' \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000', 216 rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde', 217 rsVarRange = '\\ufe0e\\ufe0f', 218 rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange; 219 220 /** Used to compose unicode capture groups. */ 221 var rsApos = "['\u2019]", 222 rsAstral = '[' + rsAstralRange + ']', 223 rsBreak = '[' + rsBreakRange + ']', 224 rsCombo = '[' + rsComboRange + ']', 225 rsDigits = '\\d+', 226 rsDingbat = '[' + rsDingbatRange + ']', 227 rsLower = '[' + rsLowerRange + ']', 228 rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']', 229 rsFitz = '\\ud83c[\\udffb-\\udfff]', 230 rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')', 231 rsNonAstral = '[^' + rsAstralRange + ']', 232 rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}', 233 rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]', 234 rsUpper = '[' + rsUpperRange + ']', 235 rsZWJ = '\\u200d'; 236 237 /** Used to compose unicode regexes. */ 238 var rsMiscLower = '(?:' + rsLower + '|' + rsMisc + ')', 239 rsMiscUpper = '(?:' + rsUpper + '|' + rsMisc + ')', 240 rsOptContrLower = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?', 241 rsOptContrUpper = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?', 242 reOptMod = rsModifier + '?', 243 rsOptVar = '[' + rsVarRange + ']?', 244 rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*', 245 rsOrdLower = '\\d*(?:1st|2nd|3rd|(?![123])\\dth)(?=\\b|[A-Z_])', 246 rsOrdUpper = '\\d*(?:1ST|2ND|3RD|(?![123])\\dTH)(?=\\b|[a-z_])', 247 rsSeq = rsOptVar + reOptMod + rsOptJoin, 248 rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq, 249 rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')'; 250 251 /** Used to match apostrophes. */ 252 var reApos = RegExp(rsApos, 'g'); 253 254 /** 255 * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and 256 * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols). 257 */ 258 var reComboMark = RegExp(rsCombo, 'g'); 259 260 /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */ 261 var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g'); 262 263 /** Used to match complex or compound words. */ 264 var reUnicodeWord = RegExp([ 265 rsUpper + '?' + rsLower + '+' + rsOptContrLower + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')', 266 rsMiscUpper + '+' + rsOptContrUpper + '(?=' + [rsBreak, rsUpper + rsMiscLower, '$'].join('|') + ')', 267 rsUpper + '?' + rsMiscLower + '+' + rsOptContrLower, 268 rsUpper + '+' + rsOptContrUpper, 269 rsOrdUpper, 270 rsOrdLower, 271 rsDigits, 272 rsEmoji 273 ].join('|'), 'g'); 274 275 /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */ 276 var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']'); 277 278 /** Used to detect strings that need a more robust regexp to match words. */ 279 var reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/; 280 281 /** Used to assign default `context` object properties. */ 282 var contextProps = [ 283 'Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array', 284 'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object', 285 'Promise', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array', 286 'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap', 287 '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout' 288 ]; 289 290 /** Used to make template sourceURLs easier to identify. */ 291 var templateCounter = -1; 292 293 /** Used to identify `toStringTag` values of typed arrays. */ 294 var typedArrayTags = {}; 295 typedArrayTags[float32Tag] = typedArrayTags[float64Tag] = 296 typedArrayTags[int8Tag] = typedArrayTags[int16Tag] = 297 typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] = 298 typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] = 299 typedArrayTags[uint32Tag] = true; 300 typedArrayTags[argsTag] = typedArrayTags[arrayTag] = 301 typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] = 302 typedArrayTags[dataViewTag] = typedArrayTags[dateTag] = 303 typedArrayTags[errorTag] = typedArrayTags[funcTag] = 304 typedArrayTags[mapTag] = typedArrayTags[numberTag] = 305 typedArrayTags[objectTag] = typedArrayTags[regexpTag] = 306 typedArrayTags[setTag] = typedArrayTags[stringTag] = 307 typedArrayTags[weakMapTag] = false; 308 309 /** Used to identify `toStringTag` values supported by `_.clone`. */ 310 var cloneableTags = {}; 311 cloneableTags[argsTag] = cloneableTags[arrayTag] = 312 cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] = 313 cloneableTags[boolTag] = cloneableTags[dateTag] = 314 cloneableTags[float32Tag] = cloneableTags[float64Tag] = 315 cloneableTags[int8Tag] = cloneableTags[int16Tag] = 316 cloneableTags[int32Tag] = cloneableTags[mapTag] = 317 cloneableTags[numberTag] = cloneableTags[objectTag] = 318 cloneableTags[regexpTag] = cloneableTags[setTag] = 319 cloneableTags[stringTag] = cloneableTags[symbolTag] = 320 cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] = 321 cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true; 322 cloneableTags[errorTag] = cloneableTags[funcTag] = 323 cloneableTags[weakMapTag] = false; 324 325 /** Used to map Latin Unicode letters to basic Latin letters. */ 326 var deburredLetters = { 327 // Latin-1 Supplement block. 328 '\xc0': 'A', '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A', 329 '\xe0': 'a', '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a', 330 '\xc7': 'C', '\xe7': 'c', 331 '\xd0': 'D', '\xf0': 'd', 332 '\xc8': 'E', '\xc9': 'E', '\xca': 'E', '\xcb': 'E', 333 '\xe8': 'e', '\xe9': 'e', '\xea': 'e', '\xeb': 'e', 334 '\xcc': 'I', '\xcd': 'I', '\xce': 'I', '\xcf': 'I', 335 '\xec': 'i', '\xed': 'i', '\xee': 'i', '\xef': 'i', 336 '\xd1': 'N', '\xf1': 'n', 337 '\xd2': 'O', '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O', 338 '\xf2': 'o', '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o', 339 '\xd9': 'U', '\xda': 'U', '\xdb': 'U', '\xdc': 'U', 340 '\xf9': 'u', '\xfa': 'u', '\xfb': 'u', '\xfc': 'u', 341 '\xdd': 'Y', '\xfd': 'y', '\xff': 'y', 342 '\xc6': 'Ae', '\xe6': 'ae', 343 '\xde': 'Th', '\xfe': 'th', 344 '\xdf': 'ss', 345 // Latin Extended-A block. 346 '\u0100': 'A', '\u0102': 'A', '\u0104': 'A', 347 '\u0101': 'a', '\u0103': 'a', '\u0105': 'a', 348 '\u0106': 'C', '\u0108': 'C', '\u010a': 'C', '\u010c': 'C', 349 '\u0107': 'c', '\u0109': 'c', '\u010b': 'c', '\u010d': 'c', 350 '\u010e': 'D', '\u0110': 'D', '\u010f': 'd', '\u0111': 'd', 351 '\u0112': 'E', '\u0114': 'E', '\u0116': 'E', '\u0118': 'E', '\u011a': 'E', 352 '\u0113': 'e', '\u0115': 'e', '\u0117': 'e', '\u0119': 'e', '\u011b': 'e', 353 '\u011c': 'G', '\u011e': 'G', '\u0120': 'G', '\u0122': 'G', 354 '\u011d': 'g', '\u011f': 'g', '\u0121': 'g', '\u0123': 'g', 355 '\u0124': 'H', '\u0126': 'H', '\u0125': 'h', '\u0127': 'h', 356 '\u0128': 'I', '\u012a': 'I', '\u012c': 'I', '\u012e': 'I', '\u0130': 'I', 357 '\u0129': 'i', '\u012b': 'i', '\u012d': 'i', '\u012f': 'i', '\u0131': 'i', 358 '\u0134': 'J', '\u0135': 'j', 359 '\u0136': 'K', '\u0137': 'k', '\u0138': 'k', 360 '\u0139': 'L', '\u013b': 'L', '\u013d': 'L', '\u013f': 'L', '\u0141': 'L', 361 '\u013a': 'l', '\u013c': 'l', '\u013e': 'l', '\u0140': 'l', '\u0142': 'l', 362 '\u0143': 'N', '\u0145': 'N', '\u0147': 'N', '\u014a': 'N', 363 '\u0144': 'n', '\u0146': 'n', '\u0148': 'n', '\u014b': 'n', 364 '\u014c': 'O', '\u014e': 'O', '\u0150': 'O', 365 '\u014d': 'o', '\u014f': 'o', '\u0151': 'o', 366 '\u0154': 'R', '\u0156': 'R', '\u0158': 'R', 367 '\u0155': 'r', '\u0157': 'r', '\u0159': 'r', 368 '\u015a': 'S', '\u015c': 'S', '\u015e': 'S', '\u0160': 'S', 369 '\u015b': 's', '\u015d': 's', '\u015f': 's', '\u0161': 's', 370 '\u0162': 'T', '\u0164': 'T', '\u0166': 'T', 371 '\u0163': 't', '\u0165': 't', '\u0167': 't', 372 '\u0168': 'U', '\u016a': 'U', '\u016c': 'U', '\u016e': 'U', '\u0170': 'U', '\u0172': 'U', 373 '\u0169': 'u', '\u016b': 'u', '\u016d': 'u', '\u016f': 'u', '\u0171': 'u', '\u0173': 'u', 374 '\u0174': 'W', '\u0175': 'w', 375 '\u0176': 'Y', '\u0177': 'y', '\u0178': 'Y', 376 '\u0179': 'Z', '\u017b': 'Z', '\u017d': 'Z', 377 '\u017a': 'z', '\u017c': 'z', '\u017e': 'z', 378 '\u0132': 'IJ', '\u0133': 'ij', 379 '\u0152': 'Oe', '\u0153': 'oe', 380 '\u0149': "'n", '\u017f': 's' 381 }; 382 383 /** Used to map characters to HTML entities. */ 384 var htmlEscapes = { 385 '&': '&', 386 '<': '<', 387 '>': '>', 388 '"': '"', 389 "'": ''' 390 }; 391 392 /** Used to map HTML entities to characters. */ 393 var htmlUnescapes = { 394 '&': '&', 395 '<': '<', 396 '>': '>', 397 '"': '"', 398 ''': "'" 399 }; 400 401 /** Used to escape characters for inclusion in compiled string literals. */ 402 var stringEscapes = { 403 '\\': '\\', 404 "'": "'", 405 '\n': 'n', 406 '\r': 'r', 407 '\u2028': 'u2028', 408 '\u2029': 'u2029' 409 }; 410 411 /** Built-in method references without a dependency on `root`. */ 412 var freeParseFloat = parseFloat, 413 freeParseInt = parseInt; 414 415 /** Detect free variable `global` from Node.js. */ 416 var freeGlobal = typeof global == 'object' && global && global.Object === Object && global; 417 418 /** Detect free variable `self`. */ 419 var freeSelf = typeof self == 'object' && self && self.Object === Object && self; 420 421 /** Used as a reference to the global object. */ 422 var root = freeGlobal || freeSelf || Function('return this')(); 423 424 /** Detect free variable `exports`. */ 425 var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports; 426 427 /** Detect free variable `module`. */ 428 var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module; 429 430 /** Detect the popular CommonJS extension `module.exports`. */ 431 var moduleExports = freeModule && freeModule.exports === freeExports; 432 433 /** Detect free variable `process` from Node.js. */ 434 var freeProcess = moduleExports && freeGlobal.process; 435 436 /** Used to access faster Node.js helpers. */ 437 var nodeUtil = (function() { 438 try { 439 // Use `util.types` for Node.js 10+. 440 var types = freeModule && freeModule.require && freeModule.require('util').types; 441 442 if (types) { 443 return types; 444 } 445 446 // Legacy `process.binding('util')` for Node.js < 10. 447 return freeProcess && freeProcess.binding && freeProcess.binding('util'); 448 } catch (e) {} 449 }()); 450 451 /* Node.js helper references. */ 452 var nodeIsArrayBuffer = nodeUtil && nodeUtil.isArrayBuffer, 453 nodeIsDate = nodeUtil && nodeUtil.isDate, 454 nodeIsMap = nodeUtil && nodeUtil.isMap, 455 nodeIsRegExp = nodeUtil && nodeUtil.isRegExp, 456 nodeIsSet = nodeUtil && nodeUtil.isSet, 457 nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray; 458 459 /*--------------------------------------------------------------------------*/ 460 461 /** 462 * A faster alternative to `Function#apply`, this function invokes `func` 463 * with the `this` binding of `thisArg` and the arguments of `args`. 464 * 465 * @private 466 * @param {Function} func The function to invoke. 467 * @param {*} thisArg The `this` binding of `func`. 468 * @param {Array} args The arguments to invoke `func` with. 469 * @returns {*} Returns the result of `func`. 470 */ 471 function apply(func, thisArg, args) { 472 switch (args.length) { 473 case 0: return func.call(thisArg); 474 case 1: return func.call(thisArg, args[0]); 475 case 2: return func.call(thisArg, args[0], args[1]); 476 case 3: return func.call(thisArg, args[0], args[1], args[2]); 477 } 478 return func.apply(thisArg, args); 479 } 480 481 /** 482 * A specialized version of `baseAggregator` for arrays. 483 * 484 * @private 485 * @param {Array} [array] The array to iterate over. 486 * @param {Function} setter The function to set `accumulator` values. 487 * @param {Function} iteratee The iteratee to transform keys. 488 * @param {Object} accumulator The initial aggregated object. 489 * @returns {Function} Returns `accumulator`. 490 */ 491 function arrayAggregator(array, setter, iteratee, accumulator) { 492 var index = -1, 493 length = array == null ? 0 : array.length; 494 495 while (++index < length) { 496 var value = array[index]; 497 setter(accumulator, value, iteratee(value), array); 498 } 499 return accumulator; 500 } 501 502 /** 503 * A specialized version of `_.forEach` for arrays without support for 504 * iteratee shorthands. 505 * 506 * @private 507 * @param {Array} [array] The array to iterate over. 508 * @param {Function} iteratee The function invoked per iteration. 509 * @returns {Array} Returns `array`. 510 */ 511 function arrayEach(array, iteratee) { 512 var index = -1, 513 length = array == null ? 0 : array.length; 514 515 while (++index < length) { 516 if (iteratee(array[index], index, array) === false) { 517 break; 518 } 519 } 520 return array; 521 } 522 523 /** 524 * A specialized version of `_.forEachRight` for arrays without support for 525 * iteratee shorthands. 526 * 527 * @private 528 * @param {Array} [array] The array to iterate over. 529 * @param {Function} iteratee The function invoked per iteration. 530 * @returns {Array} Returns `array`. 531 */ 532 function arrayEachRight(array, iteratee) { 533 var length = array == null ? 0 : array.length; 534 535 while (length--) { 536 if (iteratee(array[length], length, array) === false) { 537 break; 538 } 539 } 540 return array; 541 } 542 543 /** 544 * A specialized version of `_.every` for arrays without support for 545 * iteratee shorthands. 546 * 547 * @private 548 * @param {Array} [array] The array to iterate over. 549 * @param {Function} predicate The function invoked per iteration. 550 * @returns {boolean} Returns `true` if all elements pass the predicate check, 551 * else `false`. 552 */ 553 function arrayEvery(array, predicate) { 554 var index = -1, 555 length = array == null ? 0 : array.length; 556 557 while (++index < length) { 558 if (!predicate(array[index], index, array)) { 559 return false; 560 } 561 } 562 return true; 563 } 564 565 /** 566 * A specialized version of `_.filter` for arrays without support for 567 * iteratee shorthands. 568 * 569 * @private 570 * @param {Array} [array] The array to iterate over. 571 * @param {Function} predicate The function invoked per iteration. 572 * @returns {Array} Returns the new filtered array. 573 */ 574 function arrayFilter(array, predicate) { 575 var index = -1, 576 length = array == null ? 0 : array.length, 577 resIndex = 0, 578 result = []; 579 580 while (++index < length) { 581 var value = array[index]; 582 if (predicate(value, index, array)) { 583 result[resIndex++] = value; 584 } 585 } 586 return result; 587 } 588 589 /** 590 * A specialized version of `_.includes` for arrays without support for 591 * specifying an index to search from. 592 * 593 * @private 594 * @param {Array} [array] The array to inspect. 595 * @param {*} target The value to search for. 596 * @returns {boolean} Returns `true` if `target` is found, else `false`. 597 */ 598 function arrayIncludes(array, value) { 599 var length = array == null ? 0 : array.length; 600 return !!length && baseIndexOf(array, value, 0) > -1; 601 } 602 603 /** 604 * This function is like `arrayIncludes` except that it accepts a comparator. 605 * 606 * @private 607 * @param {Array} [array] The array to inspect. 608 * @param {*} target The value to search for. 609 * @param {Function} comparator The comparator invoked per element. 610 * @returns {boolean} Returns `true` if `target` is found, else `false`. 611 */ 612 function arrayIncludesWith(array, value, comparator) { 613 var index = -1, 614 length = array == null ? 0 : array.length; 615 616 while (++index < length) { 617 if (comparator(value, array[index])) { 618 return true; 619 } 620 } 621 return false; 622 } 623 624 /** 625 * A specialized version of `_.map` for arrays without support for iteratee 626 * shorthands. 627 * 628 * @private 629 * @param {Array} [array] The array to iterate over. 630 * @param {Function} iteratee The function invoked per iteration. 631 * @returns {Array} Returns the new mapped array. 632 */ 633 function arrayMap(array, iteratee) { 634 var index = -1, 635 length = array == null ? 0 : array.length, 636 result = Array(length); 637 638 while (++index < length) { 639 result[index] = iteratee(array[index], index, array); 640 } 641 return result; 642 } 643 644 /** 645 * Appends the elements of `values` to `array`. 646 * 647 * @private 648 * @param {Array} array The array to modify. 649 * @param {Array} values The values to append. 650 * @returns {Array} Returns `array`. 651 */ 652 function arrayPush(array, values) { 653 var index = -1, 654 length = values.length, 655 offset = array.length; 656 657 while (++index < length) { 658 array[offset + index] = values[index]; 659 } 660 return array; 661 } 662 663 /** 664 * A specialized version of `_.reduce` for arrays without support for 665 * iteratee shorthands. 666 * 667 * @private 668 * @param {Array} [array] The array to iterate over. 669 * @param {Function} iteratee The function invoked per iteration. 670 * @param {*} [accumulator] The initial value. 671 * @param {boolean} [initAccum] Specify using the first element of `array` as 672 * the initial value. 673 * @returns {*} Returns the accumulated value. 674 */ 675 function arrayReduce(array, iteratee, accumulator, initAccum) { 676 var index = -1, 677 length = array == null ? 0 : array.length; 678 679 if (initAccum && length) { 680 accumulator = array[++index]; 681 } 682 while (++index < length) { 683 accumulator = iteratee(accumulator, array[index], index, array); 684 } 685 return accumulator; 686 } 687 688 /** 689 * A specialized version of `_.reduceRight` for arrays without support for 690 * iteratee shorthands. 691 * 692 * @private 693 * @param {Array} [array] The array to iterate over. 694 * @param {Function} iteratee The function invoked per iteration. 695 * @param {*} [accumulator] The initial value. 696 * @param {boolean} [initAccum] Specify using the last element of `array` as 697 * the initial value. 698 * @returns {*} Returns the accumulated value. 699 */ 700 function arrayReduceRight(array, iteratee, accumulator, initAccum) { 701 var length = array == null ? 0 : array.length; 702 if (initAccum && length) { 703 accumulator = array[--length]; 704 } 705 while (length--) { 706 accumulator = iteratee(accumulator, array[length], length, array); 707 } 708 return accumulator; 709 } 710 711 /** 712 * A specialized version of `_.some` for arrays without support for iteratee 713 * shorthands. 714 * 715 * @private 716 * @param {Array} [array] The array to iterate over. 717 * @param {Function} predicate The function invoked per iteration. 718 * @returns {boolean} Returns `true` if any element passes the predicate check, 719 * else `false`. 720 */ 721 function arraySome(array, predicate) { 722 var index = -1, 723 length = array == null ? 0 : array.length; 724 725 while (++index < length) { 726 if (predicate(array[index], index, array)) { 727 return true; 728 } 729 } 730 return false; 731 } 732 733 /** 734 * Gets the size of an ASCII `string`. 735 * 736 * @private 737 * @param {string} string The string inspect. 738 * @returns {number} Returns the string size. 739 */ 740 var asciiSize = baseProperty('length'); 741 742 /** 743 * Converts an ASCII `string` to an array. 744 * 745 * @private 746 * @param {string} string The string to convert. 747 * @returns {Array} Returns the converted array. 748 */ 749 function asciiToArray(string) { 750 return string.split(''); 751 } 752 753 /** 754 * Splits an ASCII `string` into an array of its words. 755 * 756 * @private 757 * @param {string} The string to inspect. 758 * @returns {Array} Returns the words of `string`. 759 */ 760 function asciiWords(string) { 761 return string.match(reAsciiWord) || []; 762 } 763 764 /** 765 * The base implementation of methods like `_.findKey` and `_.findLastKey`, 766 * without support for iteratee shorthands, which iterates over `collection` 767 * using `eachFunc`. 768 * 769 * @private 770 * @param {Array|Object} collection The collection to inspect. 771 * @param {Function} predicate The function invoked per iteration. 772 * @param {Function} eachFunc The function to iterate over `collection`. 773 * @returns {*} Returns the found element or its key, else `undefined`. 774 */ 775 function baseFindKey(collection, predicate, eachFunc) { 776 var result; 777 eachFunc(collection, function(value, key, collection) { 778 if (predicate(value, key, collection)) { 779 result = key; 780 return false; 781 } 782 }); 783 return result; 784 } 785 786 /** 787 * The base implementation of `_.findIndex` and `_.findLastIndex` without 788 * support for iteratee shorthands. 789 * 790 * @private 791 * @param {Array} array The array to inspect. 792 * @param {Function} predicate The function invoked per iteration. 793 * @param {number} fromIndex The index to search from. 794 * @param {boolean} [fromRight] Specify iterating from right to left. 795 * @returns {number} Returns the index of the matched value, else `-1`. 796 */ 797 function baseFindIndex(array, predicate, fromIndex, fromRight) { 798 var length = array.length, 799 index = fromIndex + (fromRight ? 1 : -1); 800 801 while ((fromRight ? index-- : ++index < length)) { 802 if (predicate(array[index], index, array)) { 803 return index; 804 } 805 } 806 return -1; 807 } 808 809 /** 810 * The base implementation of `_.indexOf` without `fromIndex` bounds checks. 811 * 812 * @private 813 * @param {Array} array The array to inspect. 814 * @param {*} value The value to search for. 815 * @param {number} fromIndex The index to search from. 816 * @returns {number} Returns the index of the matched value, else `-1`. 817 */ 818 function baseIndexOf(array, value, fromIndex) { 819 return value === value 820 ? strictIndexOf(array, value, fromIndex) 821 : baseFindIndex(array, baseIsNaN, fromIndex); 822 } 823 824 /** 825 * This function is like `baseIndexOf` except that it accepts a comparator. 826 * 827 * @private 828 * @param {Array} array The array to inspect. 829 * @param {*} value The value to search for. 830 * @param {number} fromIndex The index to search from. 831 * @param {Function} comparator The comparator invoked per element. 832 * @returns {number} Returns the index of the matched value, else `-1`. 833 */ 834 function baseIndexOfWith(array, value, fromIndex, comparator) { 835 var index = fromIndex - 1, 836 length = array.length; 837 838 while (++index < length) { 839 if (comparator(array[index], value)) { 840 return index; 841 } 842 } 843 return -1; 844 } 845 846 /** 847 * The base implementation of `_.isNaN` without support for number objects. 848 * 849 * @private 850 * @param {*} value The value to check. 851 * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`. 852 */ 853 function baseIsNaN(value) { 854 return value !== value; 855 } 856 857 /** 858 * The base implementation of `_.mean` and `_.meanBy` without support for 859 * iteratee shorthands. 860 * 861 * @private 862 * @param {Array} array The array to iterate over. 863 * @param {Function} iteratee The function invoked per iteration. 864 * @returns {number} Returns the mean. 865 */ 866 function baseMean(array, iteratee) { 867 var length = array == null ? 0 : array.length; 868 return length ? (baseSum(array, iteratee) / length) : NAN; 869 } 870 871 /** 872 * The base implementation of `_.property` without support for deep paths. 873 * 874 * @private 875 * @param {string} key The key of the property to get. 876 * @returns {Function} Returns the new accessor function. 877 */ 878 function baseProperty(key) { 879 return function(object) { 880 return object == null ? undefined : object[key]; 881 }; 882 } 883 884 /** 885 * The base implementation of `_.propertyOf` without support for deep paths. 886 * 887 * @private 888 * @param {Object} object The object to query. 889 * @returns {Function} Returns the new accessor function. 890 */ 891 function basePropertyOf(object) { 892 return function(key) { 893 return object == null ? undefined : object[key]; 894 }; 895 } 896 897 /** 898 * The base implementation of `_.reduce` and `_.reduceRight`, without support 899 * for iteratee shorthands, which iterates over `collection` using `eachFunc`. 900 * 901 * @private 902 * @param {Array|Object} collection The collection to iterate over. 903 * @param {Function} iteratee The function invoked per iteration. 904 * @param {*} accumulator The initial value. 905 * @param {boolean} initAccum Specify using the first or last element of 906 * `collection` as the initial value. 907 * @param {Function} eachFunc The function to iterate over `collection`. 908 * @returns {*} Returns the accumulated value. 909 */ 910 function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) { 911 eachFunc(collection, function(value, index, collection) { 912 accumulator = initAccum 913 ? (initAccum = false, value) 914 : iteratee(accumulator, value, index, collection); 915 }); 916 return accumulator; 917 } 918 919 /** 920 * The base implementation of `_.sortBy` which uses `comparer` to define the 921 * sort order of `array` and replaces criteria objects with their corresponding 922 * values. 923 * 924 * @private 925 * @param {Array} array The array to sort. 926 * @param {Function} comparer The function to define sort order. 927 * @returns {Array} Returns `array`. 928 */ 929 function baseSortBy(array, comparer) { 930 var length = array.length; 931 932 array.sort(comparer); 933 while (length--) { 934 array[length] = array[length].value; 935 } 936 return array; 937 } 938 939 /** 940 * The base implementation of `_.sum` and `_.sumBy` without support for 941 * iteratee shorthands. 942 * 943 * @private 944 * @param {Array} array The array to iterate over. 945 * @param {Function} iteratee The function invoked per iteration. 946 * @returns {number} Returns the sum. 947 */ 948 function baseSum(array, iteratee) { 949 var result, 950 index = -1, 951 length = array.length; 952 953 while (++index < length) { 954 var current = iteratee(array[index]); 955 if (current !== undefined) { 956 result = result === undefined ? current : (result + current); 957 } 958 } 959 return result; 960 } 961 962 /** 963 * The base implementation of `_.times` without support for iteratee shorthands 964 * or max array length checks. 965 * 966 * @private 967 * @param {number} n The number of times to invoke `iteratee`. 968 * @param {Function} iteratee The function invoked per iteration. 969 * @returns {Array} Returns the array of results. 970 */ 971 function baseTimes(n, iteratee) { 972 var index = -1, 973 result = Array(n); 974 975 while (++index < n) { 976 result[index] = iteratee(index); 977 } 978 return result; 979 } 980 981 /** 982 * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array 983 * of key-value pairs for `object` corresponding to the property names of `props`. 984 * 985 * @private 986 * @param {Object} object The object to query. 987 * @param {Array} props The property names to get values for. 988 * @returns {Object} Returns the key-value pairs. 989 */ 990 function baseToPairs(object, props) { 991 return arrayMap(props, function(key) { 992 return [key, object[key]]; 993 }); 994 } 995 996 /** 997 * The base implementation of `_.unary` without support for storing metadata. 998 * 999 * @private 1000 * @param {Function} func The function to cap arguments for. 1001 * @returns {Function} Returns the new capped function. 1002 */ 1003 function baseUnary(func) { 1004 return function(value) { 1005 return func(value); 1006 }; 1007 } 1008 1009 /** 1010 * The base implementation of `_.values` and `_.valuesIn` which creates an 1011 * array of `object` property values corresponding to the property names 1012 * of `props`. 1013 * 1014 * @private 1015 * @param {Object} object The object to query. 1016 * @param {Array} props The property names to get values for. 1017 * @returns {Object} Returns the array of property values. 1018 */ 1019 function baseValues(object, props) { 1020 return arrayMap(props, function(key) { 1021 return object[key]; 1022 }); 1023 } 1024 1025 /** 1026 * Checks if a `cache` value for `key` exists. 1027 * 1028 * @private 1029 * @param {Object} cache The cache to query. 1030 * @param {string} key The key of the entry to check. 1031 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`. 1032 */ 1033 function cacheHas(cache, key) { 1034 return cache.has(key); 1035 } 1036 1037 /** 1038 * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol 1039 * that is not found in the character symbols. 1040 * 1041 * @private 1042 * @param {Array} strSymbols The string symbols to inspect. 1043 * @param {Array} chrSymbols The character symbols to find. 1044 * @returns {number} Returns the index of the first unmatched string symbol. 1045 */ 1046 function charsStartIndex(strSymbols, chrSymbols) { 1047 var index = -1, 1048 length = strSymbols.length; 1049 1050 while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {} 1051 return index; 1052 } 1053 1054 /** 1055 * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol 1056 * that is not found in the character symbols. 1057 * 1058 * @private 1059 * @param {Array} strSymbols The string symbols to inspect. 1060 * @param {Array} chrSymbols The character symbols to find. 1061 * @returns {number} Returns the index of the last unmatched string symbol. 1062 */ 1063 function charsEndIndex(strSymbols, chrSymbols) { 1064 var index = strSymbols.length; 1065 1066 while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {} 1067 return index; 1068 } 1069 1070 /** 1071 * Gets the number of `placeholder` occurrences in `array`. 1072 * 1073 * @private 1074 * @param {Array} array The array to inspect. 1075 * @param {*} placeholder The placeholder to search for. 1076 * @returns {number} Returns the placeholder count. 1077 */ 1078 function countHolders(array, placeholder) { 1079 var length = array.length, 1080 result = 0; 1081 1082 while (length--) { 1083 if (array[length] === placeholder) { 1084 ++result; 1085 } 1086 } 1087 return result; 1088 } 1089 1090 /** 1091 * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A 1092 * letters to basic Latin letters. 1093 * 1094 * @private 1095 * @param {string} letter The matched letter to deburr. 1096 * @returns {string} Returns the deburred letter. 1097 */ 1098 var deburrLetter = basePropertyOf(deburredLetters); 1099 1100 /** 1101 * Used by `_.escape` to convert characters to HTML entities. 1102 * 1103 * @private 1104 * @param {string} chr The matched character to escape. 1105 * @returns {string} Returns the escaped character. 1106 */ 1107 var escapeHtmlChar = basePropertyOf(htmlEscapes); 1108 1109 /** 1110 * Used by `_.template` to escape characters for inclusion in compiled string literals. 1111 * 1112 * @private 1113 * @param {string} chr The matched character to escape. 1114 * @returns {string} Returns the escaped character. 1115 */ 1116 function escapeStringChar(chr) { 1117 return '\\' + stringEscapes[chr]; 1118 } 1119 1120 /** 1121 * Gets the value at `key` of `object`. 1122 * 1123 * @private 1124 * @param {Object} [object] The object to query. 1125 * @param {string} key The key of the property to get. 1126 * @returns {*} Returns the property value. 1127 */ 1128 function getValue(object, key) { 1129 return object == null ? undefined : object[key]; 1130 } 1131 1132 /** 1133 * Checks if `string` contains Unicode symbols. 1134 * 1135 * @private 1136 * @param {string} string The string to inspect. 1137 * @returns {boolean} Returns `true` if a symbol is found, else `false`. 1138 */ 1139 function hasUnicode(string) { 1140 return reHasUnicode.test(string); 1141 } 1142 1143 /** 1144 * Checks if `string` contains a word composed of Unicode symbols. 1145 * 1146 * @private 1147 * @param {string} string The string to inspect. 1148 * @returns {boolean} Returns `true` if a word is found, else `false`. 1149 */ 1150 function hasUnicodeWord(string) { 1151 return reHasUnicodeWord.test(string); 1152 } 1153 1154 /** 1155 * Converts `iterator` to an array. 1156 * 1157 * @private 1158 * @param {Object} iterator The iterator to convert. 1159 * @returns {Array} Returns the converted array. 1160 */ 1161 function iteratorToArray(iterator) { 1162 var data, 1163 result = []; 1164 1165 while (!(data = iterator.next()).done) { 1166 result.push(data.value); 1167 } 1168 return result; 1169 } 1170 1171 /** 1172 * Converts `map` to its key-value pairs. 1173 * 1174 * @private 1175 * @param {Object} map The map to convert. 1176 * @returns {Array} Returns the key-value pairs. 1177 */ 1178 function mapToArray(map) { 1179 var index = -1, 1180 result = Array(map.size); 1181 1182 map.forEach(function(value, key) { 1183 result[++index] = [key, value]; 1184 }); 1185 return result; 1186 } 1187 1188 /** 1189 * Creates a unary function that invokes `func` with its argument transformed. 1190 * 1191 * @private 1192 * @param {Function} func The function to wrap. 1193 * @param {Function} transform The argument transform. 1194 * @returns {Function} Returns the new function. 1195 */ 1196 function overArg(func, transform) { 1197 return function(arg) { 1198 return func(transform(arg)); 1199 }; 1200 } 1201 1202 /** 1203 * Replaces all `placeholder` elements in `array` with an internal placeholder 1204 * and returns an array of their indexes. 1205 * 1206 * @private 1207 * @param {Array} array The array to modify. 1208 * @param {*} placeholder The placeholder to replace. 1209 * @returns {Array} Returns the new array of placeholder indexes. 1210 */ 1211 function replaceHolders(array, placeholder) { 1212 var index = -1, 1213 length = array.length, 1214 resIndex = 0, 1215 result = []; 1216 1217 while (++index < length) { 1218 var value = array[index]; 1219 if (value === placeholder || value === PLACEHOLDER) { 1220 array[index] = PLACEHOLDER; 1221 result[resIndex++] = index; 1222 } 1223 } 1224 return result; 1225 } 1226 1227 /** 1228 * Converts `set` to an array of its values. 1229 * 1230 * @private 1231 * @param {Object} set The set to convert. 1232 * @returns {Array} Returns the values. 1233 */ 1234 function setToArray(set) { 1235 var index = -1, 1236 result = Array(set.size); 1237 1238 set.forEach(function(value) { 1239 result[++index] = value; 1240 }); 1241 return result; 1242 } 1243 1244 /** 1245 * Converts `set` to its value-value pairs. 1246 * 1247 * @private 1248 * @param {Object} set The set to convert. 1249 * @returns {Array} Returns the value-value pairs. 1250 */ 1251 function setToPairs(set) { 1252 var index = -1, 1253 result = Array(set.size); 1254 1255 set.forEach(function(value) { 1256 result[++index] = [value, value]; 1257 }); 1258 return result; 1259 } 1260 1261 /** 1262 * A specialized version of `_.indexOf` which performs strict equality 1263 * comparisons of values, i.e. `===`. 1264 * 1265 * @private 1266 * @param {Array} array The array to inspect. 1267 * @param {*} value The value to search for. 1268 * @param {number} fromIndex The index to search from. 1269 * @returns {number} Returns the index of the matched value, else `-1`. 1270 */ 1271 function strictIndexOf(array, value, fromIndex) { 1272 var index = fromIndex - 1, 1273 length = array.length; 1274 1275 while (++index < length) { 1276 if (array[index] === value) { 1277 return index; 1278 } 1279 } 1280 return -1; 1281 } 1282 1283 /** 1284 * A specialized version of `_.lastIndexOf` which performs strict equality 1285 * comparisons of values, i.e. `===`. 1286 * 1287 * @private 1288 * @param {Array} array The array to inspect. 1289 * @param {*} value The value to search for. 1290 * @param {number} fromIndex The index to search from. 1291 * @returns {number} Returns the index of the matched value, else `-1`. 1292 */ 1293 function strictLastIndexOf(array, value, fromIndex) { 1294 var index = fromIndex + 1; 1295 while (index--) { 1296 if (array[index] === value) { 1297 return index; 1298 } 1299 } 1300 return index; 1301 } 1302 1303 /** 1304 * Gets the number of symbols in `string`. 1305 * 1306 * @private 1307 * @param {string} string The string to inspect. 1308 * @returns {number} Returns the string size. 1309 */ 1310 function stringSize(string) { 1311 return hasUnicode(string) 1312 ? unicodeSize(string) 1313 : asciiSize(string); 1314 } 1315 1316 /** 1317 * Converts `string` to an array. 1318 * 1319 * @private 1320 * @param {string} string The string to convert. 1321 * @returns {Array} Returns the converted array. 1322 */ 1323 function stringToArray(string) { 1324 return hasUnicode(string) 1325 ? unicodeToArray(string) 1326 : asciiToArray(string); 1327 } 1328 1329 /** 1330 * Used by `_.unescape` to convert HTML entities to characters. 1331 * 1332 * @private 1333 * @param {string} chr The matched character to unescape. 1334 * @returns {string} Returns the unescaped character. 1335 */ 1336 var unescapeHtmlChar = basePropertyOf(htmlUnescapes); 1337 1338 /** 1339 * Gets the size of a Unicode `string`. 1340 * 1341 * @private 1342 * @param {string} string The string inspect. 1343 * @returns {number} Returns the string size. 1344 */ 1345 function unicodeSize(string) { 1346 var result = reUnicode.lastIndex = 0; 1347 while (reUnicode.test(string)) { 1348 ++result; 1349 } 1350 return result; 1351 } 1352 1353 /** 1354 * Converts a Unicode `string` to an array. 1355 * 1356 * @private 1357 * @param {string} string The string to convert. 1358 * @returns {Array} Returns the converted array. 1359 */ 1360 function unicodeToArray(string) { 1361 return string.match(reUnicode) || []; 1362 } 1363 1364 /** 1365 * Splits a Unicode `string` into an array of its words. 1366 * 1367 * @private 1368 * @param {string} The string to inspect. 1369 * @returns {Array} Returns the words of `string`. 1370 */ 1371 function unicodeWords(string) { 1372 return string.match(reUnicodeWord) || []; 1373 } 1374 1375 /*--------------------------------------------------------------------------*/ 1376 1377 /** 1378 * Create a new pristine `lodash` function using the `context` object. 1379 * 1380 * @static 1381 * @memberOf _ 1382 * @since 1.1.0 1383 * @category Util 1384 * @param {Object} [context=root] The context object. 1385 * @returns {Function} Returns a new `lodash` function. 1386 * @example 1387 * 1388 * _.mixin({ 'foo': _.constant('foo') }); 1389 * 1390 * var lodash = _.runInContext(); 1391 * lodash.mixin({ 'bar': lodash.constant('bar') }); 1392 * 1393 * _.isFunction(_.foo); 1394 * // => true 1395 * _.isFunction(_.bar); 1396 * // => false 1397 * 1398 * lodash.isFunction(lodash.foo); 1399 * // => false 1400 * lodash.isFunction(lodash.bar); 1401 * // => true 1402 * 1403 * // Create a suped-up `defer` in Node.js. 1404 * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer; 1405 */ 1406 var runInContext = (function runInContext(context) { 1407 context = context == null ? root : _.defaults(root.Object(), context, _.pick(root, contextProps)); 1408 1409 /** Built-in constructor references. */ 1410 var Array = context.Array, 1411 Date = context.Date, 1412 Error = context.Error, 1413 Function = context.Function, 1414 Math = context.Math, 1415 Object = context.Object, 1416 RegExp = context.RegExp, 1417 String = context.String, 1418 TypeError = context.TypeError; 1419 1420 /** Used for built-in method references. */ 1421 var arrayProto = Array.prototype, 1422 funcProto = Function.prototype, 1423 objectProto = Object.prototype; 1424 1425 /** Used to detect overreaching core-js shims. */ 1426 var coreJsData = context['__core-js_shared__']; 1427 1428 /** Used to resolve the decompiled source of functions. */ 1429 var funcToString = funcProto.toString; 1430 1431 /** Used to check objects for own properties. */ 1432 var hasOwnProperty = objectProto.hasOwnProperty; 1433 1434 /** Used to generate unique IDs. */ 1435 var idCounter = 0; 1436 1437 /** Used to detect methods masquerading as native. */ 1438 var maskSrcKey = (function() { 1439 var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || ''); 1440 return uid ? ('Symbol(src)_1.' + uid) : ''; 1441 }()); 1442 1443 /** 1444 * Used to resolve the 1445 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring) 1446 * of values. 1447 */ 1448 var nativeObjectToString = objectProto.toString; 1449 1450 /** Used to infer the `Object` constructor. */ 1451 var objectCtorString = funcToString.call(Object); 1452 1453 /** Used to restore the original `_` reference in `_.noConflict`. */ 1454 var oldDash = root._; 1455 1456 /** Used to detect if a method is native. */ 1457 var reIsNative = RegExp('^' + 1458 funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&') 1459 .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$' 1460 ); 1461 1462 /** Built-in value references. */ 1463 var Buffer = moduleExports ? context.Buffer : undefined, 1464 Symbol = context.Symbol, 1465 Uint8Array = context.Uint8Array, 1466 allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined, 1467 getPrototype = overArg(Object.getPrototypeOf, Object), 1468 objectCreate = Object.create, 1469 propertyIsEnumerable = objectProto.propertyIsEnumerable, 1470 splice = arrayProto.splice, 1471 spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined, 1472 symIterator = Symbol ? Symbol.iterator : undefined, 1473 symToStringTag = Symbol ? Symbol.toStringTag : undefined; 1474 1475 var defineProperty = (function() { 1476 try { 1477 var func = getNative(Object, 'defineProperty'); 1478 func({}, '', {}); 1479 return func; 1480 } catch (e) {} 1481 }()); 1482 1483 /** Mocked built-ins. */ 1484 var ctxClearTimeout = context.clearTimeout !== root.clearTimeout && context.clearTimeout, 1485 ctxNow = Date && Date.now !== root.Date.now && Date.now, 1486 ctxSetTimeout = context.setTimeout !== root.setTimeout && context.setTimeout; 1487 1488 /* Built-in method references for those with the same name as other `lodash` methods. */ 1489 var nativeCeil = Math.ceil, 1490 nativeFloor = Math.floor, 1491 nativeGetSymbols = Object.getOwnPropertySymbols, 1492 nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined, 1493 nativeIsFinite = context.isFinite, 1494 nativeJoin = arrayProto.join, 1495 nativeKeys = overArg(Object.keys, Object), 1496 nativeMax = Math.max, 1497 nativeMin = Math.min, 1498 nativeNow = Date.now, 1499 nativeParseInt = context.parseInt, 1500 nativeRandom = Math.random, 1501 nativeReverse = arrayProto.reverse; 1502 1503 /* Built-in method references that are verified to be native. */ 1504 var DataView = getNative(context, 'DataView'), 1505 Map = getNative(context, 'Map'), 1506 Promise = getNative(context, 'Promise'), 1507 Set = getNative(context, 'Set'), 1508 WeakMap = getNative(context, 'WeakMap'), 1509 nativeCreate = getNative(Object, 'create'); 1510 1511 /** Used to store function metadata. */ 1512 var metaMap = WeakMap && new WeakMap; 1513 1514 /** Used to lookup unminified function names. */ 1515 var realNames = {}; 1516 1517 /** Used to detect maps, sets, and weakmaps. */ 1518 var dataViewCtorString = toSource(DataView), 1519 mapCtorString = toSource(Map), 1520 promiseCtorString = toSource(Promise), 1521 setCtorString = toSource(Set), 1522 weakMapCtorString = toSource(WeakMap); 1523 1524 /** Used to convert symbols to primitives and strings. */ 1525 var symbolProto = Symbol ? Symbol.prototype : undefined, 1526 symbolValueOf = symbolProto ? symbolProto.valueOf : undefined, 1527 symbolToString = symbolProto ? symbolProto.toString : undefined; 1528 1529 /*------------------------------------------------------------------------*/ 1530 1531 /** 1532 * Creates a `lodash` object which wraps `value` to enable implicit method 1533 * chain sequences. Methods that operate on and return arrays, collections, 1534 * and functions can be chained together. Methods that retrieve a single value 1535 * or may return a primitive value will automatically end the chain sequence 1536 * and return the unwrapped value. Otherwise, the value must be unwrapped 1537 * with `_#value`. 1538 * 1539 * Explicit chain sequences, which must be unwrapped with `_#value`, may be 1540 * enabled using `_.chain`. 1541 * 1542 * The execution of chained methods is lazy, that is, it's deferred until 1543 * `_#value` is implicitly or explicitly called. 1544 * 1545 * Lazy evaluation allows several methods to support shortcut fusion. 1546 * Shortcut fusion is an optimization to merge iteratee calls; this avoids 1547 * the creation of intermediate arrays and can greatly reduce the number of 1548 * iteratee executions. Sections of a chain sequence qualify for shortcut 1549 * fusion if the section is applied to an array and iteratees accept only 1550 * one argument. The heuristic for whether a section qualifies for shortcut 1551 * fusion is subject to change. 1552 * 1553 * Chaining is supported in custom builds as long as the `_#value` method is 1554 * directly or indirectly included in the build. 1555 * 1556 * In addition to lodash methods, wrappers have `Array` and `String` methods. 1557 * 1558 * The wrapper `Array` methods are: 1559 * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift` 1560 * 1561 * The wrapper `String` methods are: 1562 * `replace` and `split` 1563 * 1564 * The wrapper methods that support shortcut fusion are: 1565 * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`, 1566 * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`, 1567 * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray` 1568 * 1569 * The chainable wrapper methods are: 1570 * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`, 1571 * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`, 1572 * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`, 1573 * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`, 1574 * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`, 1575 * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`, 1576 * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`, 1577 * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`, 1578 * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`, 1579 * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`, 1580 * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`, 1581 * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`, 1582 * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`, 1583 * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`, 1584 * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`, 1585 * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`, 1586 * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`, 1587 * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`, 1588 * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`, 1589 * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`, 1590 * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`, 1591 * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`, 1592 * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`, 1593 * `zipObject`, `zipObjectDeep`, and `zipWith` 1594 * 1595 * The wrapper methods that are **not** chainable by default are: 1596 * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`, 1597 * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`, 1598 * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`, 1599 * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`, 1600 * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`, 1601 * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`, 1602 * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`, 1603 * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`, 1604 * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`, 1605 * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`, 1606 * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`, 1607 * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`, 1608 * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`, 1609 * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`, 1610 * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`, 1611 * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`, 1612 * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`, 1613 * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`, 1614 * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`, 1615 * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`, 1616 * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`, 1617 * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`, 1618 * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`, 1619 * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`, 1620 * `upperFirst`, `value`, and `words` 1621 * 1622 * @name _ 1623 * @constructor 1624 * @category Seq 1625 * @param {*} value The value to wrap in a `lodash` instance. 1626 * @returns {Object} Returns the new `lodash` wrapper instance. 1627 * @example 1628 * 1629 * function square(n) { 1630 * return n * n; 1631 * } 1632 * 1633 * var wrapped = _([1, 2, 3]); 1634 * 1635 * // Returns an unwrapped value. 1636 * wrapped.reduce(_.add); 1637 * // => 6 1638 * 1639 * // Returns a wrapped value. 1640 * var squares = wrapped.map(square); 1641 * 1642 * _.isArray(squares); 1643 * // => false 1644 * 1645 * _.isArray(squares.value()); 1646 * // => true 1647 */ 1648 function lodash(value) { 1649 if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) { 1650 if (value instanceof LodashWrapper) { 1651 return value; 1652 } 1653 if (hasOwnProperty.call(value, '__wrapped__')) { 1654 return wrapperClone(value); 1655 } 1656 } 1657 return new LodashWrapper(value); 1658 } 1659 1660 /** 1661 * The base implementation of `_.create` without support for assigning 1662 * properties to the created object. 1663 * 1664 * @private 1665 * @param {Object} proto The object to inherit from. 1666 * @returns {Object} Returns the new object. 1667 */ 1668 var baseCreate = (function() { 1669 function object() {} 1670 return function(proto) { 1671 if (!isObject(proto)) { 1672 return {}; 1673 } 1674 if (objectCreate) { 1675 return objectCreate(proto); 1676 } 1677 object.prototype = proto; 1678 var result = new object; 1679 object.prototype = undefined; 1680 return result; 1681 }; 1682 }()); 1683 1684 /** 1685 * The function whose prototype chain sequence wrappers inherit from. 1686 * 1687 * @private 1688 */ 1689 function baseLodash() { 1690 // No operation performed. 1691 } 1692 1693 /** 1694 * The base constructor for creating `lodash` wrapper objects. 1695 * 1696 * @private 1697 * @param {*} value The value to wrap. 1698 * @param {boolean} [chainAll] Enable explicit method chain sequences. 1699 */ 1700 function LodashWrapper(value, chainAll) { 1701 this.__wrapped__ = value; 1702 this.__actions__ = []; 1703 this.__chain__ = !!chainAll; 1704 this.__index__ = 0; 1705 this.__values__ = undefined; 1706 } 1707 1708 /** 1709 * By default, the template delimiters used by lodash are like those in 1710 * embedded Ruby (ERB) as well as ES2015 template strings. Change the 1711 * following template settings to use alternative delimiters. 1712 * 1713 * @static 1714 * @memberOf _ 1715 * @type {Object} 1716 */ 1717 lodash.templateSettings = { 1718 1719 /** 1720 * Used to detect `data` property values to be HTML-escaped. 1721 * 1722 * @memberOf _.templateSettings 1723 * @type {RegExp} 1724 */ 1725 'escape': reEscape, 1726 1727 /** 1728 * Used to detect code to be evaluated. 1729 * 1730 * @memberOf _.templateSettings 1731 * @type {RegExp} 1732 */ 1733 'evaluate': reEvaluate, 1734 1735 /** 1736 * Used to detect `data` property values to inject. 1737 * 1738 * @memberOf _.templateSettings 1739 * @type {RegExp} 1740 */ 1741 'interpolate': reInterpolate, 1742 1743 /** 1744 * Used to reference the data object in the template text. 1745 * 1746 * @memberOf _.templateSettings 1747 * @type {string} 1748 */ 1749 'variable': '', 1750 1751 /** 1752 * Used to import variables into the compiled template. 1753 * 1754 * @memberOf _.templateSettings 1755 * @type {Object} 1756 */ 1757 'imports': { 1758 1759 /** 1760 * A reference to the `lodash` function. 1761 * 1762 * @memberOf _.templateSettings.imports 1763 * @type {Function} 1764 */ 1765 '_': lodash 1766 } 1767 }; 1768 1769 // Ensure wrappers are instances of `baseLodash`. 1770 lodash.prototype = baseLodash.prototype; 1771 lodash.prototype.constructor = lodash; 1772 1773 LodashWrapper.prototype = baseCreate(baseLodash.prototype); 1774 LodashWrapper.prototype.constructor = LodashWrapper; 1775 1776 /*------------------------------------------------------------------------*/ 1777 1778 /** 1779 * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation. 1780 * 1781 * @private 1782 * @constructor 1783 * @param {*} value The value to wrap. 1784 */ 1785 function LazyWrapper(value) { 1786 this.__wrapped__ = value; 1787 this.__actions__ = []; 1788 this.__dir__ = 1; 1789 this.__filtered__ = false; 1790 this.__iteratees__ = []; 1791 this.__takeCount__ = MAX_ARRAY_LENGTH; 1792 this.__views__ = []; 1793 } 1794 1795 /** 1796 * Creates a clone of the lazy wrapper object. 1797 * 1798 * @private 1799 * @name clone 1800 * @memberOf LazyWrapper 1801 * @returns {Object} Returns the cloned `LazyWrapper` object. 1802 */ 1803 function lazyClone() { 1804 var result = new LazyWrapper(this.__wrapped__); 1805 result.__actions__ = copyArray(this.__actions__); 1806 result.__dir__ = this.__dir__; 1807 result.__filtered__ = this.__filtered__; 1808 result.__iteratees__ = copyArray(this.__iteratees__); 1809 result.__takeCount__ = this.__takeCount__; 1810 result.__views__ = copyArray(this.__views__); 1811 return result; 1812 } 1813 1814 /** 1815 * Reverses the direction of lazy iteration. 1816 * 1817 * @private 1818 * @name reverse 1819 * @memberOf LazyWrapper 1820 * @returns {Object} Returns the new reversed `LazyWrapper` object. 1821 */ 1822 function lazyReverse() { 1823 if (this.__filtered__) { 1824 var result = new LazyWrapper(this); 1825 result.__dir__ = -1; 1826 result.__filtered__ = true; 1827 } else { 1828 result = this.clone(); 1829 result.__dir__ *= -1; 1830 } 1831 return result; 1832 } 1833 1834 /** 1835 * Extracts the unwrapped value from its lazy wrapper. 1836 * 1837 * @private 1838 * @name value 1839 * @memberOf LazyWrapper 1840 * @returns {*} Returns the unwrapped value. 1841 */ 1842 function lazyValue() { 1843 var array = this.__wrapped__.value(), 1844 dir = this.__dir__, 1845 isArr = isArray(array), 1846 isRight = dir < 0, 1847 arrLength = isArr ? array.length : 0, 1848 view = getView(0, arrLength, this.__views__), 1849 start = view.start, 1850 end = view.end, 1851 length = end - start, 1852 index = isRight ? end : (start - 1), 1853 iteratees = this.__iteratees__, 1854 iterLength = iteratees.length, 1855 resIndex = 0, 1856 takeCount = nativeMin(length, this.__takeCount__); 1857 1858 if (!isArr || (!isRight && arrLength == length && takeCount == length)) { 1859 return baseWrapperValue(array, this.__actions__); 1860 } 1861 var result = []; 1862 1863 outer: 1864 while (length-- && resIndex < takeCount) { 1865 index += dir; 1866 1867 var iterIndex = -1, 1868 value = array[index]; 1869 1870 while (++iterIndex < iterLength) { 1871 var data = iteratees[iterIndex], 1872 iteratee = data.iteratee, 1873 type = data.type, 1874 computed = iteratee(value); 1875 1876 if (type == LAZY_MAP_FLAG) { 1877 value = computed; 1878 } else if (!computed) { 1879 if (type == LAZY_FILTER_FLAG) { 1880 continue outer; 1881 } else { 1882 break outer; 1883 } 1884 } 1885 } 1886 result[resIndex++] = value; 1887 } 1888 return result; 1889 } 1890 1891 // Ensure `LazyWrapper` is an instance of `baseLodash`. 1892 LazyWrapper.prototype = baseCreate(baseLodash.prototype); 1893 LazyWrapper.prototype.constructor = LazyWrapper; 1894 1895 /*------------------------------------------------------------------------*/ 1896 1897 /** 1898 * Creates a hash object. 1899 * 1900 * @private 1901 * @constructor 1902 * @param {Array} [entries] The key-value pairs to cache. 1903 */ 1904 function Hash(entries) { 1905 var index = -1, 1906 length = entries == null ? 0 : entries.length; 1907 1908 this.clear(); 1909 while (++index < length) { 1910 var entry = entries[index]; 1911 this.set(entry[0], entry[1]); 1912 } 1913 } 1914 1915 /** 1916 * Removes all key-value entries from the hash. 1917 * 1918 * @private 1919 * @name clear 1920 * @memberOf Hash 1921 */ 1922 function hashClear() { 1923 this.__data__ = nativeCreate ? nativeCreate(null) : {}; 1924 this.size = 0; 1925 } 1926 1927 /** 1928 * Removes `key` and its value from the hash. 1929 * 1930 * @private 1931 * @name delete 1932 * @memberOf Hash 1933 * @param {Object} hash The hash to modify. 1934 * @param {string} key The key of the value to remove. 1935 * @returns {boolean} Returns `true` if the entry was removed, else `false`. 1936 */ 1937 function hashDelete(key) { 1938 var result = this.has(key) && delete this.__data__[key]; 1939 this.size -= result ? 1 : 0; 1940 return result; 1941 } 1942 1943 /** 1944 * Gets the hash value for `key`. 1945 * 1946 * @private 1947 * @name get 1948 * @memberOf Hash 1949 * @param {string} key The key of the value to get. 1950 * @returns {*} Returns the entry value. 1951 */ 1952 function hashGet(key) { 1953 var data = this.__data__; 1954 if (nativeCreate) { 1955 var result = data[key]; 1956 return result === HASH_UNDEFINED ? undefined : result; 1957 } 1958 return hasOwnProperty.call(data, key) ? data[key] : undefined; 1959 } 1960 1961 /** 1962 * Checks if a hash value for `key` exists. 1963 * 1964 * @private 1965 * @name has 1966 * @memberOf Hash 1967 * @param {string} key The key of the entry to check. 1968 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`. 1969 */ 1970 function hashHas(key) { 1971 var data = this.__data__; 1972 return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key); 1973 } 1974 1975 /** 1976 * Sets the hash `key` to `value`. 1977 * 1978 * @private 1979 * @name set 1980 * @memberOf Hash 1981 * @param {string} key The key of the value to set. 1982 * @param {*} value The value to set. 1983 * @returns {Object} Returns the hash instance. 1984 */ 1985 function hashSet(key, value) { 1986 var data = this.__data__; 1987 this.size += this.has(key) ? 0 : 1; 1988 data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value; 1989 return this; 1990 } 1991 1992 // Add methods to `Hash`. 1993 Hash.prototype.clear = hashClear; 1994 Hash.prototype['delete'] = hashDelete; 1995 Hash.prototype.get = hashGet; 1996 Hash.prototype.has = hashHas; 1997 Hash.prototype.set = hashSet; 1998 1999 /*------------------------------------------------------------------------*/ 2000 2001 /** 2002 * Creates an list cache object. 2003 * 2004 * @private 2005 * @constructor 2006 * @param {Array} [entries] The key-value pairs to cache. 2007 */ 2008 function ListCache(entries) { 2009 var index = -1, 2010 length = entries == null ? 0 : entries.length; 2011 2012 this.clear(); 2013 while (++index < length) { 2014 var entry = entries[index]; 2015 this.set(entry[0], entry[1]); 2016 } 2017 } 2018 2019 /** 2020 * Removes all key-value entries from the list cache. 2021 * 2022 * @private 2023 * @name clear 2024 * @memberOf ListCache 2025 */ 2026 function listCacheClear() { 2027 this.__data__ = []; 2028 this.size = 0; 2029 } 2030 2031 /** 2032 * Removes `key` and its value from the list cache. 2033 * 2034 * @private 2035 * @name delete 2036 * @memberOf ListCache 2037 * @param {string} key The key of the value to remove. 2038 * @returns {boolean} Returns `true` if the entry was removed, else `false`. 2039 */ 2040 function listCacheDelete(key) { 2041 var data = this.__data__, 2042 index = assocIndexOf(data, key); 2043 2044 if (index < 0) { 2045 return false; 2046 } 2047 var lastIndex = data.length - 1; 2048 if (index == lastIndex) { 2049 data.pop(); 2050 } else { 2051 splice.call(data, index, 1); 2052 } 2053 --this.size; 2054 return true; 2055 } 2056 2057 /** 2058 * Gets the list cache value for `key`. 2059 * 2060 * @private 2061 * @name get 2062 * @memberOf ListCache 2063 * @param {string} key The key of the value to get. 2064 * @returns {*} Returns the entry value. 2065 */ 2066 function listCacheGet(key) { 2067 var data = this.__data__, 2068 index = assocIndexOf(data, key); 2069 2070 return index < 0 ? undefined : data[index][1]; 2071 } 2072 2073 /** 2074 * Checks if a list cache value for `key` exists. 2075 * 2076 * @private 2077 * @name has 2078 * @memberOf ListCache 2079 * @param {string} key The key of the entry to check. 2080 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`. 2081 */ 2082 function listCacheHas(key) { 2083 return assocIndexOf(this.__data__, key) > -1; 2084 } 2085 2086 /** 2087 * Sets the list cache `key` to `value`. 2088 * 2089 * @private 2090 * @name set 2091 * @memberOf ListCache 2092 * @param {string} key The key of the value to set. 2093 * @param {*} value The value to set. 2094 * @returns {Object} Returns the list cache instance. 2095 */ 2096 function listCacheSet(key, value) { 2097 var data = this.__data__, 2098 index = assocIndexOf(data, key); 2099 2100 if (index < 0) { 2101 ++this.size; 2102 data.push([key, value]); 2103 } else { 2104 data[index][1] = value; 2105 } 2106 return this; 2107 } 2108 2109 // Add methods to `ListCache`. 2110 ListCache.prototype.clear = listCacheClear; 2111 ListCache.prototype['delete'] = listCacheDelete; 2112 ListCache.prototype.get = listCacheGet; 2113 ListCache.prototype.has = listCacheHas; 2114 ListCache.prototype.set = listCacheSet; 2115 2116 /*------------------------------------------------------------------------*/ 2117 2118 /** 2119 * Creates a map cache object to store key-value pairs. 2120 * 2121 * @private 2122 * @constructor 2123 * @param {Array} [entries] The key-value pairs to cache. 2124 */ 2125 function MapCache(entries) { 2126 var index = -1, 2127 length = entries == null ? 0 : entries.length; 2128 2129 this.clear(); 2130 while (++index < length) { 2131 var entry = entries[index]; 2132 this.set(entry[0], entry[1]); 2133 } 2134 } 2135 2136 /** 2137 * Removes all key-value entries from the map. 2138 * 2139 * @private 2140 * @name clear 2141 * @memberOf MapCache 2142 */ 2143 function mapCacheClear() { 2144 this.size = 0; 2145 this.__data__ = { 2146 'hash': new Hash, 2147 'map': new (Map || ListCache), 2148 'string': new Hash 2149 }; 2150 } 2151 2152 /** 2153 * Removes `key` and its value from the map. 2154 * 2155 * @private 2156 * @name delete 2157 * @memberOf MapCache 2158 * @param {string} key The key of the value to remove. 2159 * @returns {boolean} Returns `true` if the entry was removed, else `false`. 2160 */ 2161 function mapCacheDelete(key) { 2162 var result = getMapData(this, key)['delete'](key); 2163 this.size -= result ? 1 : 0; 2164 return result; 2165 } 2166 2167 /** 2168 * Gets the map value for `key`. 2169 * 2170 * @private 2171 * @name get 2172 * @memberOf MapCache 2173 * @param {string} key The key of the value to get. 2174 * @returns {*} Returns the entry value. 2175 */ 2176 function mapCacheGet(key) { 2177 return getMapData(this, key).get(key); 2178 } 2179 2180 /** 2181 * Checks if a map value for `key` exists. 2182 * 2183 * @private 2184 * @name has 2185 * @memberOf MapCache 2186 * @param {string} key The key of the entry to check. 2187 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`. 2188 */ 2189 function mapCacheHas(key) { 2190 return getMapData(this, key).has(key); 2191 } 2192 2193 /** 2194 * Sets the map `key` to `value`. 2195 * 2196 * @private 2197 * @name set 2198 * @memberOf MapCache 2199 * @param {string} key The key of the value to set. 2200 * @param {*} value The value to set. 2201 * @returns {Object} Returns the map cache instance. 2202 */ 2203 function mapCacheSet(key, value) { 2204 var data = getMapData(this, key), 2205 size = data.size; 2206 2207 data.set(key, value); 2208 this.size += data.size == size ? 0 : 1; 2209 return this; 2210 } 2211 2212 // Add methods to `MapCache`. 2213 MapCache.prototype.clear = mapCacheClear; 2214 MapCache.prototype['delete'] = mapCacheDelete; 2215 MapCache.prototype.get = mapCacheGet; 2216 MapCache.prototype.has = mapCacheHas; 2217 MapCache.prototype.set = mapCacheSet; 2218 2219 /*------------------------------------------------------------------------*/ 2220 2221 /** 2222 * 2223 * Creates an array cache object to store unique values. 2224 * 2225 * @private 2226 * @constructor 2227 * @param {Array} [values] The values to cache. 2228 */ 2229 function SetCache(values) { 2230 var index = -1, 2231 length = values == null ? 0 : values.length; 2232 2233 this.__data__ = new MapCache; 2234 while (++index < length) { 2235 this.add(values[index]); 2236 } 2237 } 2238 2239 /** 2240 * Adds `value` to the array cache. 2241 * 2242 * @private 2243 * @name add 2244 * @memberOf SetCache 2245 * @alias push 2246 * @param {*} value The value to cache. 2247 * @returns {Object} Returns the cache instance. 2248 */ 2249 function setCacheAdd(value) { 2250 this.__data__.set(value, HASH_UNDEFINED); 2251 return this; 2252 } 2253 2254 /** 2255 * Checks if `value` is in the array cache. 2256 * 2257 * @private 2258 * @name has 2259 * @memberOf SetCache 2260 * @param {*} value The value to search for. 2261 * @returns {number} Returns `true` if `value` is found, else `false`. 2262 */ 2263 function setCacheHas(value) { 2264 return this.__data__.has(value); 2265 } 2266 2267 // Add methods to `SetCache`. 2268 SetCache.prototype.add = SetCache.prototype.push = setCacheAdd; 2269 SetCache.prototype.has = setCacheHas; 2270 2271 /*------------------------------------------------------------------------*/ 2272 2273 /** 2274 * Creates a stack cache object to store key-value pairs. 2275 * 2276 * @private 2277 * @constructor 2278 * @param {Array} [entries] The key-value pairs to cache. 2279 */ 2280 function Stack(entries) { 2281 var data = this.__data__ = new ListCache(entries); 2282 this.size = data.size; 2283 } 2284 2285 /** 2286 * Removes all key-value entries from the stack. 2287 * 2288 * @private 2289 * @name clear 2290 * @memberOf Stack 2291 */ 2292 function stackClear() { 2293 this.__data__ = new ListCache; 2294 this.size = 0; 2295 } 2296 2297 /** 2298 * Removes `key` and its value from the stack. 2299 * 2300 * @private 2301 * @name delete 2302 * @memberOf Stack 2303 * @param {string} key The key of the value to remove. 2304 * @returns {boolean} Returns `true` if the entry was removed, else `false`. 2305 */ 2306 function stackDelete(key) { 2307 var data = this.__data__, 2308 result = data['delete'](key); 2309 2310 this.size = data.size; 2311 return result; 2312 } 2313 2314 /** 2315 * Gets the stack value for `key`. 2316 * 2317 * @private 2318 * @name get 2319 * @memberOf Stack 2320 * @param {string} key The key of the value to get. 2321 * @returns {*} Returns the entry value. 2322 */ 2323 function stackGet(key) { 2324 return this.__data__.get(key); 2325 } 2326 2327 /** 2328 * Checks if a stack value for `key` exists. 2329 * 2330 * @private 2331 * @name has 2332 * @memberOf Stack 2333 * @param {string} key The key of the entry to check. 2334 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`. 2335 */ 2336 function stackHas(key) { 2337 return this.__data__.has(key); 2338 } 2339 2340 /** 2341 * Sets the stack `key` to `value`. 2342 * 2343 * @private 2344 * @name set 2345 * @memberOf Stack 2346 * @param {string} key The key of the value to set. 2347 * @param {*} value The value to set. 2348 * @returns {Object} Returns the stack cache instance. 2349 */ 2350 function stackSet(key, value) { 2351 var data = this.__data__; 2352 if (data instanceof ListCache) { 2353 var pairs = data.__data__; 2354 if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) { 2355 pairs.push([key, value]); 2356 this.size = ++data.size; 2357 return this; 2358 } 2359 data = this.__data__ = new MapCache(pairs); 2360 } 2361 data.set(key, value); 2362 this.size = data.size; 2363 return this; 2364 } 2365 2366 // Add methods to `Stack`. 2367 Stack.prototype.clear = stackClear; 2368 Stack.prototype['delete'] = stackDelete; 2369 Stack.prototype.get = stackGet; 2370 Stack.prototype.has = stackHas; 2371 Stack.prototype.set = stackSet; 2372 2373 /*------------------------------------------------------------------------*/ 2374 2375 /** 2376 * Creates an array of the enumerable property names of the array-like `value`. 2377 * 2378 * @private 2379 * @param {*} value The value to query. 2380 * @param {boolean} inherited Specify returning inherited property names. 2381 * @returns {Array} Returns the array of property names. 2382 */ 2383 function arrayLikeKeys(value, inherited) { 2384 var isArr = isArray(value), 2385 isArg = !isArr && isArguments(value), 2386 isBuff = !isArr && !isArg && isBuffer(value), 2387 isType = !isArr && !isArg && !isBuff && isTypedArray(value), 2388 skipIndexes = isArr || isArg || isBuff || isType, 2389 result = skipIndexes ? baseTimes(value.length, String) : [], 2390 length = result.length; 2391 2392 for (var key in value) { 2393 if ((inherited || hasOwnProperty.call(value, key)) && 2394 !(skipIndexes && ( 2395 // Safari 9 has enumerable `arguments.length` in strict mode. 2396 key == 'length' || 2397 // Node.js 0.10 has enumerable non-index properties on buffers. 2398 (isBuff && (key == 'offset' || key == 'parent')) || 2399 // PhantomJS 2 has enumerable non-index properties on typed arrays. 2400 (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) || 2401 // Skip index properties. 2402 isIndex(key, length) 2403 ))) { 2404 result.push(key); 2405 } 2406 } 2407 return result; 2408 } 2409 2410 /** 2411 * A specialized version of `_.sample` for arrays. 2412 * 2413 * @private 2414 * @param {Array} array The array to sample. 2415 * @returns {*} Returns the random element. 2416 */ 2417 function arraySample(array) { 2418 var length = array.length; 2419 return length ? array[baseRandom(0, length - 1)] : undefined; 2420 } 2421 2422 /** 2423 * A specialized version of `_.sampleSize` for arrays. 2424 * 2425 * @private 2426 * @param {Array} array The array to sample. 2427 * @param {number} n The number of elements to sample. 2428 * @returns {Array} Returns the random elements. 2429 */ 2430 function arraySampleSize(array, n) { 2431 return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length)); 2432 } 2433 2434 /** 2435 * A specialized version of `_.shuffle` for arrays. 2436 * 2437 * @private 2438 * @param {Array} array The array to shuffle. 2439 * @returns {Array} Returns the new shuffled array. 2440 */ 2441 function arrayShuffle(array) { 2442 return shuffleSelf(copyArray(array)); 2443 } 2444 2445 /** 2446 * This function is like `assignValue` except that it doesn't assign 2447 * `undefined` values. 2448 * 2449 * @private 2450 * @param {Object} object The object to modify. 2451 * @param {string} key The key of the property to assign. 2452 * @param {*} value The value to assign. 2453 */ 2454 function assignMergeValue(object, key, value) { 2455 if ((value !== undefined && !eq(object[key], value)) || 2456 (value === undefined && !(key in object))) { 2457 baseAssignValue(object, key, value); 2458 } 2459 } 2460 2461 /** 2462 * Assigns `value` to `key` of `object` if the existing value is not equivalent 2463 * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) 2464 * for equality comparisons. 2465 * 2466 * @private 2467 * @param {Object} object The object to modify. 2468 * @param {string} key The key of the property to assign. 2469 * @param {*} value The value to assign. 2470 */ 2471 function assignValue(object, key, value) { 2472 var objValue = object[key]; 2473 if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) || 2474 (value === undefined && !(key in object))) { 2475 baseAssignValue(object, key, value); 2476 } 2477 } 2478 2479 /** 2480 * Gets the index at which the `key` is found in `array` of key-value pairs. 2481 * 2482 * @private 2483 * @param {Array} array The array to inspect. 2484 * @param {*} key The key to search for. 2485 * @returns {number} Returns the index of the matched value, else `-1`. 2486 */ 2487 function assocIndexOf(array, key) { 2488 var length = array.length; 2489 while (length--) { 2490 if (eq(array[length][0], key)) { 2491 return length; 2492 } 2493 } 2494 return -1; 2495 } 2496 2497 /** 2498 * Aggregates elements of `collection` on `accumulator` with keys transformed 2499 * by `iteratee` and values set by `setter`. 2500 * 2501 * @private 2502 * @param {Array|Object} collection The collection to iterate over. 2503 * @param {Function} setter The function to set `accumulator` values. 2504 * @param {Function} iteratee The iteratee to transform keys. 2505 * @param {Object} accumulator The initial aggregated object. 2506 * @returns {Function} Returns `accumulator`. 2507 */ 2508 function baseAggregator(collection, setter, iteratee, accumulator) { 2509 baseEach(collection, function(value, key, collection) { 2510 setter(accumulator, value, iteratee(value), collection); 2511 }); 2512 return accumulator; 2513 } 2514 2515 /** 2516 * The base implementation of `_.assign` without support for multiple sources 2517 * or `customizer` functions. 2518 * 2519 * @private 2520 * @param {Object} object The destination object. 2521 * @param {Object} source The source object. 2522 * @returns {Object} Returns `object`. 2523 */ 2524 function baseAssign(object, source) { 2525 return object && copyObject(source, keys(source), object); 2526 } 2527 2528 /** 2529 * The base implementation of `_.assignIn` without support for multiple sources 2530 * or `customizer` functions. 2531 * 2532 * @private 2533 * @param {Object} object The destination object. 2534 * @param {Object} source The source object. 2535 * @returns {Object} Returns `object`. 2536 */ 2537 function baseAssignIn(object, source) { 2538 return object && copyObject(source, keysIn(source), object); 2539 } 2540 2541 /** 2542 * The base implementation of `assignValue` and `assignMergeValue` without 2543 * value checks. 2544 * 2545 * @private 2546 * @param {Object} object The object to modify. 2547 * @param {string} key The key of the property to assign. 2548 * @param {*} value The value to assign. 2549 */ 2550 function baseAssignValue(object, key, value) { 2551 if (key == '__proto__' && defineProperty) { 2552 defineProperty(object, key, { 2553 'configurable': true, 2554 'enumerable': true, 2555 'value': value, 2556 'writable': true 2557 }); 2558 } else { 2559 object[key] = value; 2560 } 2561 } 2562 2563 /** 2564 * The base implementation of `_.at` without support for individual paths. 2565 * 2566 * @private 2567 * @param {Object} object The object to iterate over. 2568 * @param {string[]} paths The property paths to pick. 2569 * @returns {Array} Returns the picked elements. 2570 */ 2571 function baseAt(object, paths) { 2572 var index = -1, 2573 length = paths.length, 2574 result = Array(length), 2575 skip = object == null; 2576 2577 while (++index < length) { 2578 result[index] = skip ? undefined : get(object, paths[index]); 2579 } 2580 return result; 2581 } 2582 2583 /** 2584 * The base implementation of `_.clamp` which doesn't coerce arguments. 2585 * 2586 * @private 2587 * @param {number} number The number to clamp. 2588 * @param {number} [lower] The lower bound. 2589 * @param {number} upper The upper bound. 2590 * @returns {number} Returns the clamped number. 2591 */ 2592 function baseClamp(number, lower, upper) { 2593 if (number === number) { 2594 if (upper !== undefined) { 2595 number = number <= upper ? number : upper; 2596 } 2597 if (lower !== undefined) { 2598 number = number >= lower ? number : lower; 2599 } 2600 } 2601 return number; 2602 } 2603 2604 /** 2605 * The base implementation of `_.clone` and `_.cloneDeep` which tracks 2606 * traversed objects. 2607 * 2608 * @private 2609 * @param {*} value The value to clone. 2610 * @param {boolean} bitmask The bitmask flags. 2611 * 1 - Deep clone 2612 * 2 - Flatten inherited properties 2613 * 4 - Clone symbols 2614 * @param {Function} [customizer] The function to customize cloning. 2615 * @param {string} [key] The key of `value`. 2616 * @param {Object} [object] The parent object of `value`. 2617 * @param {Object} [stack] Tracks traversed objects and their clone counterparts. 2618 * @returns {*} Returns the cloned value. 2619 */ 2620 function baseClone(value, bitmask, customizer, key, object, stack) { 2621 var result, 2622 isDeep = bitmask & CLONE_DEEP_FLAG, 2623 isFlat = bitmask & CLONE_FLAT_FLAG, 2624 isFull = bitmask & CLONE_SYMBOLS_FLAG; 2625 2626 if (customizer) { 2627 result = object ? customizer(value, key, object, stack) : customizer(value); 2628 } 2629 if (result !== undefined) { 2630 return result; 2631 } 2632 if (!isObject(value)) { 2633 return value; 2634 } 2635 var isArr = isArray(value); 2636 if (isArr) { 2637 result = initCloneArray(value); 2638 if (!isDeep) { 2639 return copyArray(value, result); 2640 } 2641 } else { 2642 var tag = getTag(value), 2643 isFunc = tag == funcTag || tag == genTag; 2644 2645 if (isBuffer(value)) { 2646 return cloneBuffer(value, isDeep); 2647 } 2648 if (tag == objectTag || tag == argsTag || (isFunc && !object)) { 2649 result = (isFlat || isFunc) ? {} : initCloneObject(value); 2650 if (!isDeep) { 2651 return isFlat 2652 ? copySymbolsIn(value, baseAssignIn(result, value)) 2653 : copySymbols(value, baseAssign(result, value)); 2654 } 2655 } else { 2656 if (!cloneableTags[tag]) { 2657 return object ? value : {}; 2658 } 2659 result = initCloneByTag(value, tag, isDeep); 2660 } 2661 } 2662 // Check for circular references and return its corresponding clone. 2663 stack || (stack = new Stack); 2664 var stacked = stack.get(value); 2665 if (stacked) { 2666 return stacked; 2667 } 2668 stack.set(value, result); 2669 2670 if (isSet(value)) { 2671 value.forEach(function(subValue) { 2672 result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack)); 2673 }); 2674 } else if (isMap(value)) { 2675 value.forEach(function(subValue, key) { 2676 result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack)); 2677 }); 2678 } 2679 2680 var keysFunc = isFull 2681 ? (isFlat ? getAllKeysIn : getAllKeys) 2682 : (isFlat ? keysIn : keys); 2683 2684 var props = isArr ? undefined : keysFunc(value); 2685 arrayEach(props || value, function(subValue, key) { 2686 if (props) { 2687 key = subValue; 2688 subValue = value[key]; 2689 } 2690 // Recursively populate clone (susceptible to call stack limits). 2691 assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack)); 2692 }); 2693 return result; 2694 } 2695 2696 /** 2697 * The base implementation of `_.conforms` which doesn't clone `source`. 2698 * 2699 * @private 2700 * @param {Object} source The object of property predicates to conform to. 2701 * @returns {Function} Returns the new spec function. 2702 */ 2703 function baseConforms(source) { 2704 var props = keys(source); 2705 return function(object) { 2706 return baseConformsTo(object, source, props); 2707 }; 2708 } 2709 2710 /** 2711 * The base implementation of `_.conformsTo` which accepts `props` to check. 2712 * 2713 * @private 2714 * @param {Object} object The object to inspect. 2715 * @param {Object} source The object of property predicates to conform to. 2716 * @returns {boolean} Returns `true` if `object` conforms, else `false`. 2717 */ 2718 function baseConformsTo(object, source, props) { 2719 var length = props.length; 2720 if (object == null) { 2721 return !length; 2722 } 2723 object = Object(object); 2724 while (length--) { 2725 var key = props[length], 2726 predicate = source[key], 2727 value = object[key]; 2728 2729 if ((value === undefined && !(key in object)) || !predicate(value)) { 2730 return false; 2731 } 2732 } 2733 return true; 2734 } 2735 2736 /** 2737 * The base implementation of `_.delay` and `_.defer` which accepts `args` 2738 * to provide to `func`. 2739 * 2740 * @private 2741 * @param {Function} func The function to delay. 2742 * @param {number} wait The number of milliseconds to delay invocation. 2743 * @param {Array} args The arguments to provide to `func`. 2744 * @returns {number|Object} Returns the timer id or timeout object. 2745 */ 2746 function baseDelay(func, wait, args) { 2747 if (typeof func != 'function') { 2748 throw new TypeError(FUNC_ERROR_TEXT); 2749 } 2750 return setTimeout(function() { func.apply(undefined, args); }, wait); 2751 } 2752 2753 /** 2754 * The base implementation of methods like `_.difference` without support 2755 * for excluding multiple arrays or iteratee shorthands. 2756 * 2757 * @private 2758 * @param {Array} array The array to inspect. 2759 * @param {Array} values The values to exclude. 2760 * @param {Function} [iteratee] The iteratee invoked per element. 2761 * @param {Function} [comparator] The comparator invoked per element. 2762 * @returns {Array} Returns the new array of filtered values. 2763 */ 2764 function baseDifference(array, values, iteratee, comparator) { 2765 var index = -1, 2766 includes = arrayIncludes, 2767 isCommon = true, 2768 length = array.length, 2769 result = [], 2770 valuesLength = values.length; 2771 2772 if (!length) { 2773 return result; 2774 } 2775 if (iteratee) { 2776 values = arrayMap(values, baseUnary(iteratee)); 2777 } 2778 if (comparator) { 2779 includes = arrayIncludesWith; 2780 isCommon = false; 2781 } 2782 else if (values.length >= LARGE_ARRAY_SIZE) { 2783 includes = cacheHas; 2784 isCommon = false; 2785 values = new SetCache(values); 2786 } 2787 outer: 2788 while (++index < length) { 2789 var value = array[index], 2790 computed = iteratee == null ? value : iteratee(value); 2791 2792 value = (comparator || value !== 0) ? value : 0; 2793 if (isCommon && computed === computed) { 2794 var valuesIndex = valuesLength; 2795 while (valuesIndex--) { 2796 if (values[valuesIndex] === computed) { 2797 continue outer; 2798 } 2799 } 2800 result.push(value); 2801 } 2802 else if (!includes(values, computed, comparator)) { 2803 result.push(value); 2804 } 2805 } 2806 return result; 2807 } 2808 2809 /** 2810 * The base implementation of `_.forEach` without support for iteratee shorthands. 2811 * 2812 * @private 2813 * @param {Array|Object} collection The collection to iterate over. 2814 * @param {Function} iteratee The function invoked per iteration. 2815 * @returns {Array|Object} Returns `collection`. 2816 */ 2817 var baseEach = createBaseEach(baseForOwn); 2818 2819 /** 2820 * The base implementation of `_.forEachRight` without support for iteratee shorthands. 2821 * 2822 * @private 2823 * @param {Array|Object} collection The collection to iterate over. 2824 * @param {Function} iteratee The function invoked per iteration. 2825 * @returns {Array|Object} Returns `collection`. 2826 */ 2827 var baseEachRight = createBaseEach(baseForOwnRight, true); 2828 2829 /** 2830 * The base implementation of `_.every` without support for iteratee shorthands. 2831 * 2832 * @private 2833 * @param {Array|Object} collection The collection to iterate over. 2834 * @param {Function} predicate The function invoked per iteration. 2835 * @returns {boolean} Returns `true` if all elements pass the predicate check, 2836 * else `false` 2837 */ 2838 function baseEvery(collection, predicate) { 2839 var result = true; 2840 baseEach(collection, function(value, index, collection) { 2841 result = !!predicate(value, index, collection); 2842 return result; 2843 }); 2844 return result; 2845 } 2846 2847 /** 2848 * The base implementation of methods like `_.max` and `_.min` which accepts a 2849 * `comparator` to determine the extremum value. 2850 * 2851 * @private 2852 * @param {Array} array The array to iterate over. 2853 * @param {Function} iteratee The iteratee invoked per iteration. 2854 * @param {Function} comparator The comparator used to compare values. 2855 * @returns {*} Returns the extremum value. 2856 */ 2857 function baseExtremum(array, iteratee, comparator) { 2858 var index = -1, 2859 length = array.length; 2860 2861 while (++index < length) { 2862 var value = array[index], 2863 current = iteratee(value); 2864 2865 if (current != null && (computed === undefined 2866 ? (current === current && !isSymbol(current)) 2867 : comparator(current, computed) 2868 )) { 2869 var computed = current, 2870 result = value; 2871 } 2872 } 2873 return result; 2874 } 2875 2876 /** 2877 * The base implementation of `_.fill` without an iteratee call guard. 2878 * 2879 * @private 2880 * @param {Array} array The array to fill. 2881 * @param {*} value The value to fill `array` with. 2882 * @param {number} [start=0] The start position. 2883 * @param {number} [end=array.length] The end position. 2884 * @returns {Array} Returns `array`. 2885 */ 2886 function baseFill(array, value, start, end) { 2887 var length = array.length; 2888 2889 start = toInteger(start); 2890 if (start < 0) { 2891 start = -start > length ? 0 : (length + start); 2892 } 2893 end = (end === undefined || end > length) ? length : toInteger(end); 2894 if (end < 0) { 2895 end += length; 2896 } 2897 end = start > end ? 0 : toLength(end); 2898 while (start < end) { 2899 array[start++] = value; 2900 } 2901 return array; 2902 } 2903 2904 /** 2905 * The base implementation of `_.filter` without support for iteratee shorthands. 2906 * 2907 * @private 2908 * @param {Array|Object} collection The collection to iterate over. 2909 * @param {Function} predicate The function invoked per iteration. 2910 * @returns {Array} Returns the new filtered array. 2911 */ 2912 function baseFilter(collection, predicate) { 2913 var result = []; 2914 baseEach(collection, function(value, index, collection) { 2915 if (predicate(value, index, collection)) { 2916 result.push(value); 2917 } 2918 }); 2919 return result; 2920 } 2921 2922 /** 2923 * The base implementation of `_.flatten` with support for restricting flattening. 2924 * 2925 * @private 2926 * @param {Array} array The array to flatten. 2927 * @param {number} depth The maximum recursion depth. 2928 * @param {boolean} [predicate=isFlattenable] The function invoked per iteration. 2929 * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks. 2930 * @param {Array} [result=[]] The initial result value. 2931 * @returns {Array} Returns the new flattened array. 2932 */ 2933 function baseFlatten(array, depth, predicate, isStrict, result) { 2934 var index = -1, 2935 length = array.length; 2936 2937 predicate || (predicate = isFlattenable); 2938 result || (result = []); 2939 2940 while (++index < length) { 2941 var value = array[index]; 2942 if (depth > 0 && predicate(value)) { 2943 if (depth > 1) { 2944 // Recursively flatten arrays (susceptible to call stack limits). 2945 baseFlatten(value, depth - 1, predicate, isStrict, result); 2946 } else { 2947 arrayPush(result, value); 2948 } 2949 } else if (!isStrict) { 2950 result[result.length] = value; 2951 } 2952 } 2953 return result; 2954 } 2955 2956 /** 2957 * The base implementation of `baseForOwn` which iterates over `object` 2958 * properties returned by `keysFunc` and invokes `iteratee` for each property. 2959 * Iteratee functions may exit iteration early by explicitly returning `false`. 2960 * 2961 * @private 2962 * @param {Object} object The object to iterate over. 2963 * @param {Function} iteratee The function invoked per iteration. 2964 * @param {Function} keysFunc The function to get the keys of `object`. 2965 * @returns {Object} Returns `object`. 2966 */ 2967 var baseFor = createBaseFor(); 2968 2969 /** 2970 * This function is like `baseFor` except that it iterates over properties 2971 * in the opposite order. 2972 * 2973 * @private 2974 * @param {Object} object The object to iterate over. 2975 * @param {Function} iteratee The function invoked per iteration. 2976 * @param {Function} keysFunc The function to get the keys of `object`. 2977 * @returns {Object} Returns `object`. 2978 */ 2979 var baseForRight = createBaseFor(true); 2980 2981 /** 2982 * The base implementation of `_.forOwn` without support for iteratee shorthands. 2983 * 2984 * @private 2985 * @param {Object} object The object to iterate over. 2986 * @param {Function} iteratee The function invoked per iteration. 2987 * @returns {Object} Returns `object`. 2988 */ 2989 function baseForOwn(object, iteratee) { 2990 return object && baseFor(object, iteratee, keys); 2991 } 2992 2993 /** 2994 * The base implementation of `_.forOwnRight` without support for iteratee shorthands. 2995 * 2996 * @private 2997 * @param {Object} object The object to iterate over. 2998 * @param {Function} iteratee The function invoked per iteration. 2999 * @returns {Object} Returns `object`. 3000 */ 3001 function baseForOwnRight(object, iteratee) { 3002 return object && baseForRight(object, iteratee, keys); 3003 } 3004 3005 /** 3006 * The base implementation of `_.functions` which creates an array of 3007 * `object` function property names filtered from `props`. 3008 * 3009 * @private 3010 * @param {Object} object The object to inspect. 3011 * @param {Array} props The property names to filter. 3012 * @returns {Array} Returns the function names. 3013 */ 3014 function baseFunctions(object, props) { 3015 return arrayFilter(props, function(key) { 3016 return isFunction(object[key]); 3017 }); 3018 } 3019 3020 /** 3021 * The base implementation of `_.get` without support for default values. 3022 * 3023 * @private 3024 * @param {Object} object The object to query. 3025 * @param {Array|string} path The path of the property to get. 3026 * @returns {*} Returns the resolved value. 3027 */ 3028 function baseGet(object, path) { 3029 path = castPath(path, object); 3030 3031 var index = 0, 3032 length = path.length; 3033 3034 while (object != null && index < length) { 3035 object = object[toKey(path[index++])]; 3036 } 3037 return (index && index == length) ? object : undefined; 3038 } 3039 3040 /** 3041 * The base implementation of `getAllKeys` and `getAllKeysIn` which uses 3042 * `keysFunc` and `symbolsFunc` to get the enumerable property names and 3043 * symbols of `object`. 3044 * 3045 * @private 3046 * @param {Object} object The object to query. 3047 * @param {Function} keysFunc The function to get the keys of `object`. 3048 * @param {Function} symbolsFunc The function to get the symbols of `object`. 3049 * @returns {Array} Returns the array of property names and symbols. 3050 */ 3051 function baseGetAllKeys(object, keysFunc, symbolsFunc) { 3052 var result = keysFunc(object); 3053 return isArray(object) ? result : arrayPush(result, symbolsFunc(object)); 3054 } 3055 3056 /** 3057 * The base implementation of `getTag` without fallbacks for buggy environments. 3058 * 3059 * @private 3060 * @param {*} value The value to query. 3061 * @returns {string} Returns the `toStringTag`. 3062 */ 3063 function baseGetTag(value) { 3064 if (value == null) { 3065 return value === undefined ? undefinedTag : nullTag; 3066 } 3067 return (symToStringTag && symToStringTag in Object(value)) 3068 ? getRawTag(value) 3069 : objectToString(value); 3070 } 3071 3072 /** 3073 * The base implementation of `_.gt` which doesn't coerce arguments. 3074 * 3075 * @private 3076 * @param {*} value The value to compare. 3077 * @param {*} other The other value to compare. 3078 * @returns {boolean} Returns `true` if `value` is greater than `other`, 3079 * else `false`. 3080 */ 3081 function baseGt(value, other) { 3082 return value > other; 3083 } 3084 3085 /** 3086 * The base implementation of `_.has` without support for deep paths. 3087 * 3088 * @private 3089 * @param {Object} [object] The object to query. 3090 * @param {Array|string} key The key to check. 3091 * @returns {boolean} Returns `true` if `key` exists, else `false`. 3092 */ 3093 function baseHas(object, key) { 3094 return object != null && hasOwnProperty.call(object, key); 3095 } 3096 3097 /** 3098 * The base implementation of `_.hasIn` without support for deep paths. 3099 * 3100 * @private 3101 * @param {Object} [object] The object to query. 3102 * @param {Array|string} key The key to check. 3103 * @returns {boolean} Returns `true` if `key` exists, else `false`. 3104 */ 3105 function baseHasIn(object, key) { 3106 return object != null && key in Object(object); 3107 } 3108 3109 /** 3110 * The base implementation of `_.inRange` which doesn't coerce arguments. 3111 * 3112 * @private 3113 * @param {number} number The number to check. 3114 * @param {number} start The start of the range. 3115 * @param {number} end The end of the range. 3116 * @returns {boolean} Returns `true` if `number` is in the range, else `false`. 3117 */ 3118 function baseInRange(number, start, end) { 3119 return number >= nativeMin(start, end) && number < nativeMax(start, end); 3120 } 3121 3122 /** 3123 * The base implementation of methods like `_.intersection`, without support 3124 * for iteratee shorthands, that accepts an array of arrays to inspect. 3125 * 3126 * @private 3127 * @param {Array} arrays The arrays to inspect. 3128 * @param {Function} [iteratee] The iteratee invoked per element. 3129 * @param {Function} [comparator] The comparator invoked per element. 3130 * @returns {Array} Returns the new array of shared values. 3131 */ 3132 function baseIntersection(arrays, iteratee, comparator) { 3133 var includes = comparator ? arrayIncludesWith : arrayIncludes, 3134 length = arrays[0].length, 3135 othLength = arrays.length, 3136 othIndex = othLength, 3137 caches = Array(othLength), 3138 maxLength = Infinity, 3139 result = []; 3140 3141 while (othIndex--) { 3142 var array = arrays[othIndex]; 3143 if (othIndex && iteratee) { 3144 array = arrayMap(array, baseUnary(iteratee)); 3145 } 3146 maxLength = nativeMin(array.length, maxLength); 3147 caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120)) 3148 ? new SetCache(othIndex && array) 3149 : undefined; 3150 } 3151 array = arrays[0]; 3152 3153 var index = -1, 3154 seen = caches[0]; 3155 3156 outer: 3157 while (++index < length && result.length < maxLength) { 3158 var value = array[index], 3159 computed = iteratee ? iteratee(value) : value; 3160 3161 value = (comparator || value !== 0) ? value : 0; 3162 if (!(seen 3163 ? cacheHas(seen, computed) 3164 : includes(result, computed, comparator) 3165 )) { 3166 othIndex = othLength; 3167 while (--othIndex) { 3168 var cache = caches[othIndex]; 3169 if (!(cache 3170 ? cacheHas(cache, computed) 3171 : includes(arrays[othIndex], computed, comparator)) 3172 ) { 3173 continue outer; 3174 } 3175 } 3176 if (seen) { 3177 seen.push(computed); 3178 } 3179 result.push(value); 3180 } 3181 } 3182 return result; 3183 } 3184 3185 /** 3186 * The base implementation of `_.invert` and `_.invertBy` which inverts 3187 * `object` with values transformed by `iteratee` and set by `setter`. 3188 * 3189 * @private 3190 * @param {Object} object The object to iterate over. 3191 * @param {Function} setter The function to set `accumulator` values. 3192 * @param {Function} iteratee The iteratee to transform values. 3193 * @param {Object} accumulator The initial inverted object. 3194 * @returns {Function} Returns `accumulator`. 3195 */ 3196 function baseInverter(object, setter, iteratee, accumulator) { 3197 baseForOwn(object, function(value, key, object) { 3198 setter(accumulator, iteratee(value), key, object); 3199 }); 3200 return accumulator; 3201 } 3202 3203 /** 3204 * The base implementation of `_.invoke` without support for individual 3205 * method arguments. 3206 * 3207 * @private 3208 * @param {Object} object The object to query. 3209 * @param {Array|string} path The path of the method to invoke. 3210 * @param {Array} args The arguments to invoke the method with. 3211 * @returns {*} Returns the result of the invoked method. 3212 */ 3213 function baseInvoke(object, path, args) { 3214 path = castPath(path, object); 3215 object = parent(object, path); 3216 var func = object == null ? object : object[toKey(last(path))]; 3217 return func == null ? undefined : apply(func, object, args); 3218 } 3219 3220 /** 3221 * The base implementation of `_.isArguments`. 3222 * 3223 * @private 3224 * @param {*} value The value to check. 3225 * @returns {boolean} Returns `true` if `value` is an `arguments` object, 3226 */ 3227 function baseIsArguments(value) { 3228 return isObjectLike(value) && baseGetTag(value) == argsTag; 3229 } 3230 3231 /** 3232 * The base implementation of `_.isArrayBuffer` without Node.js optimizations. 3233 * 3234 * @private 3235 * @param {*} value The value to check. 3236 * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`. 3237 */ 3238 function baseIsArrayBuffer(value) { 3239 return isObjectLike(value) && baseGetTag(value) == arrayBufferTag; 3240 } 3241 3242 /** 3243 * The base implementation of `_.isDate` without Node.js optimizations. 3244 * 3245 * @private 3246 * @param {*} value The value to check. 3247 * @returns {boolean} Returns `true` if `value` is a date object, else `false`. 3248 */ 3249 function baseIsDate(value) { 3250 return isObjectLike(value) && baseGetTag(value) == dateTag; 3251 } 3252 3253 /** 3254 * The base implementation of `_.isEqual` which supports partial comparisons 3255 * and tracks traversed objects. 3256 * 3257 * @private 3258 * @param {*} value The value to compare. 3259 * @param {*} other The other value to compare. 3260 * @param {boolean} bitmask The bitmask flags. 3261 * 1 - Unordered comparison 3262 * 2 - Partial comparison 3263 * @param {Function} [customizer] The function to customize comparisons. 3264 * @param {Object} [stack] Tracks traversed `value` and `other` objects. 3265 * @returns {boolean} Returns `true` if the values are equivalent, else `false`. 3266 */ 3267 function baseIsEqual(value, other, bitmask, customizer, stack) { 3268 if (value === other) { 3269 return true; 3270 } 3271 if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) { 3272 return value !== value && other !== other; 3273 } 3274 return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack); 3275 } 3276 3277 /** 3278 * A specialized version of `baseIsEqual` for arrays and objects which performs 3279 * deep comparisons and tracks traversed objects enabling objects with circular 3280 * references to be compared. 3281 * 3282 * @private 3283 * @param {Object} object The object to compare. 3284 * @param {Object} other The other object to compare. 3285 * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details. 3286 * @param {Function} customizer The function to customize comparisons. 3287 * @param {Function} equalFunc The function to determine equivalents of values. 3288 * @param {Object} [stack] Tracks traversed `object` and `other` objects. 3289 * @returns {boolean} Returns `true` if the objects are equivalent, else `false`. 3290 */ 3291 function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) { 3292 var objIsArr = isArray(object), 3293 othIsArr = isArray(other), 3294 objTag = objIsArr ? arrayTag : getTag(object), 3295 othTag = othIsArr ? arrayTag : getTag(other); 3296 3297 objTag = objTag == argsTag ? objectTag : objTag; 3298 othTag = othTag == argsTag ? objectTag : othTag; 3299 3300 var objIsObj = objTag == objectTag, 3301 othIsObj = othTag == objectTag, 3302 isSameTag = objTag == othTag; 3303 3304 if (isSameTag && isBuffer(object)) { 3305 if (!isBuffer(other)) { 3306 return false; 3307 } 3308 objIsArr = true; 3309 objIsObj = false; 3310 } 3311 if (isSameTag && !objIsObj) { 3312 stack || (stack = new Stack); 3313 return (objIsArr || isTypedArray(object)) 3314 ? equalArrays(object, other, bitmask, customizer, equalFunc, stack) 3315 : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack); 3316 } 3317 if (!(bitmask & COMPARE_PARTIAL_FLAG)) { 3318 var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'), 3319 othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__'); 3320 3321 if (objIsWrapped || othIsWrapped) { 3322 var objUnwrapped = objIsWrapped ? object.value() : object, 3323 othUnwrapped = othIsWrapped ? other.value() : other; 3324 3325 stack || (stack = new Stack); 3326 return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack); 3327 } 3328 } 3329 if (!isSameTag) { 3330 return false; 3331 } 3332 stack || (stack = new Stack); 3333 return equalObjects(object, other, bitmask, customizer, equalFunc, stack); 3334 } 3335 3336 /** 3337 * The base implementation of `_.isMap` without Node.js optimizations. 3338 * 3339 * @private 3340 * @param {*} value The value to check. 3341 * @returns {boolean} Returns `true` if `value` is a map, else `false`. 3342 */ 3343 function baseIsMap(value) { 3344 return isObjectLike(value) && getTag(value) == mapTag; 3345 } 3346 3347 /** 3348 * The base implementation of `_.isMatch` without support for iteratee shorthands. 3349 * 3350 * @private 3351 * @param {Object} object The object to inspect. 3352 * @param {Object} source The object of property values to match. 3353 * @param {Array} matchData The property names, values, and compare flags to match. 3354 * @param {Function} [customizer] The function to customize comparisons. 3355 * @returns {boolean} Returns `true` if `object` is a match, else `false`. 3356 */ 3357 function baseIsMatch(object, source, matchData, customizer) { 3358 var index = matchData.length, 3359 length = index, 3360 noCustomizer = !customizer; 3361 3362 if (object == null) { 3363 return !length; 3364 } 3365 object = Object(object); 3366 while (index--) { 3367 var data = matchData[index]; 3368 if ((noCustomizer && data[2]) 3369 ? data[1] !== object[data[0]] 3370 : !(data[0] in object) 3371 ) { 3372 return false; 3373 } 3374 } 3375 while (++index < length) { 3376 data = matchData[index]; 3377 var key = data[0], 3378 objValue = object[key], 3379 srcValue = data[1]; 3380 3381 if (noCustomizer && data[2]) { 3382 if (objValue === undefined && !(key in object)) { 3383 return false; 3384 } 3385 } else { 3386 var stack = new Stack; 3387 if (customizer) { 3388 var result = customizer(objValue, srcValue, key, object, source, stack); 3389 } 3390 if (!(result === undefined 3391 ? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack) 3392 : result 3393 )) { 3394 return false; 3395 } 3396 } 3397 } 3398 return true; 3399 } 3400 3401 /** 3402 * The base implementation of `_.isNative` without bad shim checks. 3403 * 3404 * @private 3405 * @param {*} value The value to check. 3406 * @returns {boolean} Returns `true` if `value` is a native function, 3407 * else `false`. 3408 */ 3409 function baseIsNative(value) { 3410 if (!isObject(value) || isMasked(value)) { 3411 return false; 3412 } 3413 var pattern = isFunction(value) ? reIsNative : reIsHostCtor; 3414 return pattern.test(toSource(value)); 3415 } 3416 3417 /** 3418 * The base implementation of `_.isRegExp` without Node.js optimizations. 3419 * 3420 * @private 3421 * @param {*} value The value to check. 3422 * @returns {boolean} Returns `true` if `value` is a regexp, else `false`. 3423 */ 3424 function baseIsRegExp(value) { 3425 return isObjectLike(value) && baseGetTag(value) == regexpTag; 3426 } 3427 3428 /** 3429 * The base implementation of `_.isSet` without Node.js optimizations. 3430 * 3431 * @private 3432 * @param {*} value The value to check. 3433 * @returns {boolean} Returns `true` if `value` is a set, else `false`. 3434 */ 3435 function baseIsSet(value) { 3436 return isObjectLike(value) && getTag(value) == setTag; 3437 } 3438 3439 /** 3440 * The base implementation of `_.isTypedArray` without Node.js optimizations. 3441 * 3442 * @private 3443 * @param {*} value The value to check. 3444 * @returns {boolean} Returns `true` if `value` is a typed array, else `false`. 3445 */ 3446 function baseIsTypedArray(value) { 3447 return isObjectLike(value) && 3448 isLength(value.length) && !!typedArrayTags[baseGetTag(value)]; 3449 } 3450 3451 /** 3452 * The base implementation of `_.iteratee`. 3453 * 3454 * @private 3455 * @param {*} [value=_.identity] The value to convert to an iteratee. 3456 * @returns {Function} Returns the iteratee. 3457 */ 3458 function baseIteratee(value) { 3459 // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9. 3460 // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details. 3461 if (typeof value == 'function') { 3462 return value; 3463 } 3464 if (value == null) { 3465 return identity; 3466 } 3467 if (typeof value == 'object') { 3468 return isArray(value) 3469 ? baseMatchesProperty(value[0], value[1]) 3470 : baseMatches(value); 3471 } 3472 return property(value); 3473 } 3474 3475 /** 3476 * The base implementation of `_.keys` which doesn't treat sparse arrays as dense. 3477 * 3478 * @private 3479 * @param {Object} object The object to query. 3480 * @returns {Array} Returns the array of property names. 3481 */ 3482 function baseKeys(object) { 3483 if (!isPrototype(object)) { 3484 return nativeKeys(object); 3485 } 3486 var result = []; 3487 for (var key in Object(object)) { 3488 if (hasOwnProperty.call(object, key) && key != 'constructor') { 3489 result.push(key); 3490 } 3491 } 3492 return result; 3493 } 3494 3495 /** 3496 * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense. 3497 * 3498 * @private 3499 * @param {Object} object The object to query. 3500 * @returns {Array} Returns the array of property names. 3501 */ 3502 function baseKeysIn(object) { 3503 if (!isObject(object)) { 3504 return nativeKeysIn(object); 3505 } 3506 var isProto = isPrototype(object), 3507 result = []; 3508 3509 for (var key in object) { 3510 if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) { 3511 result.push(key); 3512 } 3513 } 3514 return result; 3515 } 3516 3517 /** 3518 * The base implementation of `_.lt` which doesn't coerce arguments. 3519 * 3520 * @private 3521 * @param {*} value The value to compare. 3522 * @param {*} other The other value to compare. 3523 * @returns {boolean} Returns `true` if `value` is less than `other`, 3524 * else `false`. 3525 */ 3526 function baseLt(value, other) { 3527 return value < other; 3528 } 3529 3530 /** 3531 * The base implementation of `_.map` without support for iteratee shorthands. 3532 * 3533 * @private 3534 * @param {Array|Object} collection The collection to iterate over. 3535 * @param {Function} iteratee The function invoked per iteration. 3536 * @returns {Array} Returns the new mapped array. 3537 */ 3538 function baseMap(collection, iteratee) { 3539 var index = -1, 3540 result = isArrayLike(collection) ? Array(collection.length) : []; 3541 3542 baseEach(collection, function(value, key, collection) { 3543 result[++index] = iteratee(value, key, collection); 3544 }); 3545 return result; 3546 } 3547 3548 /** 3549 * The base implementation of `_.matches` which doesn't clone `source`. 3550 * 3551 * @private 3552 * @param {Object} source The object of property values to match. 3553 * @returns {Function} Returns the new spec function. 3554 */ 3555 function baseMatches(source) { 3556 var matchData = getMatchData(source); 3557 if (matchData.length == 1 && matchData[0][2]) { 3558 return matchesStrictComparable(matchData[0][0], matchData[0][1]); 3559 } 3560 return function(object) { 3561 return object === source || baseIsMatch(object, source, matchData); 3562 }; 3563 } 3564 3565 /** 3566 * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`. 3567 * 3568 * @private 3569 * @param {string} path The path of the property to get. 3570 * @param {*} srcValue The value to match. 3571 * @returns {Function} Returns the new spec function. 3572 */ 3573 function baseMatchesProperty(path, srcValue) { 3574 if (isKey(path) && isStrictComparable(srcValue)) { 3575 return matchesStrictComparable(toKey(path), srcValue); 3576 } 3577 return function(object) { 3578 var objValue = get(object, path); 3579 return (objValue === undefined && objValue === srcValue) 3580 ? hasIn(object, path) 3581 : baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG); 3582 }; 3583 } 3584 3585 /** 3586 * The base implementation of `_.merge` without support for multiple sources. 3587 * 3588 * @private 3589 * @param {Object} object The destination object. 3590 * @param {Object} source The source object. 3591 * @param {number} srcIndex The index of `source`. 3592 * @param {Function} [customizer] The function to customize merged values. 3593 * @param {Object} [stack] Tracks traversed source values and their merged 3594 * counterparts. 3595 */ 3596 function baseMerge(object, source, srcIndex, customizer, stack) { 3597 if (object === source) { 3598 return; 3599 } 3600 baseFor(source, function(srcValue, key) { 3601 stack || (stack = new Stack); 3602 if (isObject(srcValue)) { 3603 baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack); 3604 } 3605 else { 3606 var newValue = customizer 3607 ? customizer(safeGet(object, key), srcValue, (key + ''), object, source, stack) 3608 : undefined; 3609 3610 if (newValue === undefined) { 3611 newValue = srcValue; 3612 } 3613 assignMergeValue(object, key, newValue); 3614 } 3615 }, keysIn); 3616 } 3617 3618 /** 3619 * A specialized version of `baseMerge` for arrays and objects which performs 3620 * deep merges and tracks traversed objects enabling objects with circular 3621 * references to be merged. 3622 * 3623 * @private 3624 * @param {Object} object The destination object. 3625 * @param {Object} source The source object. 3626 * @param {string} key The key of the value to merge. 3627 * @param {number} srcIndex The index of `source`. 3628 * @param {Function} mergeFunc The function to merge values. 3629 * @param {Function} [customizer] The function to customize assigned values. 3630 * @param {Object} [stack] Tracks traversed source values and their merged 3631 * counterparts. 3632 */ 3633 function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) { 3634 var objValue = safeGet(object, key), 3635 srcValue = safeGet(source, key), 3636 stacked = stack.get(srcValue); 3637 3638 if (stacked) { 3639 assignMergeValue(object, key, stacked); 3640 return; 3641 } 3642 var newValue = customizer 3643 ? customizer(objValue, srcValue, (key + ''), object, source, stack) 3644 : undefined; 3645 3646 var isCommon = newValue === undefined; 3647 3648 if (isCommon) { 3649 var isArr = isArray(srcValue), 3650 isBuff = !isArr && isBuffer(srcValue), 3651 isTyped = !isArr && !isBuff && isTypedArray(srcValue); 3652 3653 newValue = srcValue; 3654 if (isArr || isBuff || isTyped) { 3655 if (isArray(objValue)) { 3656 newValue = objValue; 3657 } 3658 else if (isArrayLikeObject(objValue)) { 3659 newValue = copyArray(objValue); 3660 } 3661 else if (isBuff) { 3662 isCommon = false; 3663 newValue = cloneBuffer(srcValue, true); 3664 } 3665 else if (isTyped) { 3666 isCommon = false; 3667 newValue = cloneTypedArray(srcValue, true); 3668 } 3669 else { 3670 newValue = []; 3671 } 3672 } 3673 else if (isPlainObject(srcValue) || isArguments(srcValue)) { 3674 newValue = objValue; 3675 if (isArguments(objValue)) { 3676 newValue = toPlainObject(objValue); 3677 } 3678 else if (!isObject(objValue) || isFunction(objValue)) { 3679 newValue = initCloneObject(srcValue); 3680 } 3681 } 3682 else { 3683 isCommon = false; 3684 } 3685 } 3686 if (isCommon) { 3687 // Recursively merge objects and arrays (susceptible to call stack limits). 3688 stack.set(srcValue, newValue); 3689 mergeFunc(newValue, srcValue, srcIndex, customizer, stack); 3690 stack['delete'](srcValue); 3691 } 3692 assignMergeValue(object, key, newValue); 3693 } 3694 3695 /** 3696 * The base implementation of `_.nth` which doesn't coerce arguments. 3697 * 3698 * @private 3699 * @param {Array} array The array to query. 3700 * @param {number} n The index of the element to return. 3701 * @returns {*} Returns the nth element of `array`. 3702 */ 3703 function baseNth(array, n) { 3704 var length = array.length; 3705 if (!length) { 3706 return; 3707 } 3708 n += n < 0 ? length : 0; 3709 return isIndex(n, length) ? array[n] : undefined; 3710 } 3711 3712 /** 3713 * The base implementation of `_.orderBy` without param guards. 3714 * 3715 * @private 3716 * @param {Array|Object} collection The collection to iterate over. 3717 * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by. 3718 * @param {string[]} orders The sort orders of `iteratees`. 3719 * @returns {Array} Returns the new sorted array. 3720 */ 3721 function baseOrderBy(collection, iteratees, orders) { 3722 if (iteratees.length) { 3723 iteratees = arrayMap(iteratees, function(iteratee) { 3724 if (isArray(iteratee)) { 3725 return function(value) { 3726 return baseGet(value, iteratee.length === 1 ? iteratee[0] : iteratee); 3727 } 3728 } 3729 return iteratee; 3730 }); 3731 } else { 3732 iteratees = [identity]; 3733 } 3734 3735 var index = -1; 3736 iteratees = arrayMap(iteratees, baseUnary(getIteratee())); 3737 3738 var result = baseMap(collection, function(value, key, collection) { 3739 var criteria = arrayMap(iteratees, function(iteratee) { 3740 return iteratee(value); 3741 }); 3742 return { 'criteria': criteria, 'index': ++index, 'value': value }; 3743 }); 3744 3745 return baseSortBy(result, function(object, other) { 3746 return compareMultiple(object, other, orders); 3747 }); 3748 } 3749 3750 /** 3751 * The base implementation of `_.pick` without support for individual 3752 * property identifiers. 3753 * 3754 * @private 3755 * @param {Object} object The source object. 3756 * @param {string[]} paths The property paths to pick. 3757 * @returns {Object} Returns the new object. 3758 */ 3759 function basePick(object, paths) { 3760 return basePickBy(object, paths, function(value, path) { 3761 return hasIn(object, path); 3762 }); 3763 } 3764 3765 /** 3766 * The base implementation of `_.pickBy` without support for iteratee shorthands. 3767 * 3768 * @private 3769 * @param {Object} object The source object. 3770 * @param {string[]} paths The property paths to pick. 3771 * @param {Function} predicate The function invoked per property. 3772 * @returns {Object} Returns the new object. 3773 */ 3774 function basePickBy(object, paths, predicate) { 3775 var index = -1, 3776 length = paths.length, 3777 result = {}; 3778 3779 while (++index < length) { 3780 var path = paths[index], 3781 value = baseGet(object, path); 3782 3783 if (predicate(value, path)) { 3784 baseSet(result, castPath(path, object), value); 3785 } 3786 } 3787 return result; 3788 } 3789 3790 /** 3791 * A specialized version of `baseProperty` which supports deep paths. 3792 * 3793 * @private 3794 * @param {Array|string} path The path of the property to get. 3795 * @returns {Function} Returns the new accessor function. 3796 */ 3797 function basePropertyDeep(path) { 3798 return function(object) { 3799 return baseGet(object, path); 3800 }; 3801 } 3802 3803 /** 3804 * The base implementation of `_.pullAllBy` without support for iteratee 3805 * shorthands. 3806 * 3807 * @private 3808 * @param {Array} array The array to modify. 3809 * @param {Array} values The values to remove. 3810 * @param {Function} [iteratee] The iteratee invoked per element. 3811 * @param {Function} [comparator] The comparator invoked per element. 3812 * @returns {Array} Returns `array`. 3813 */ 3814 function basePullAll(array, values, iteratee, comparator) { 3815 var indexOf = comparator ? baseIndexOfWith : baseIndexOf, 3816 index = -1, 3817 length = values.length, 3818 seen = array; 3819 3820 if (array === values) { 3821 values = copyArray(values); 3822 } 3823 if (iteratee) { 3824 seen = arrayMap(array, baseUnary(iteratee)); 3825 } 3826 while (++index < length) { 3827 var fromIndex = 0, 3828 value = values[index], 3829 computed = iteratee ? iteratee(value) : value; 3830 3831 while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) { 3832 if (seen !== array) { 3833 splice.call(seen, fromIndex, 1); 3834 } 3835 splice.call(array, fromIndex, 1); 3836 } 3837 } 3838 return array; 3839 } 3840 3841 /** 3842 * The base implementation of `_.pullAt` without support for individual 3843 * indexes or capturing the removed elements. 3844 * 3845 * @private 3846 * @param {Array} array The array to modify. 3847 * @param {number[]} indexes The indexes of elements to remove. 3848 * @returns {Array} Returns `array`. 3849 */ 3850 function basePullAt(array, indexes) { 3851 var length = array ? indexes.length : 0, 3852 lastIndex = length - 1; 3853 3854 while (length--) { 3855 var index = indexes[length]; 3856 if (length == lastIndex || index !== previous) { 3857 var previous = index; 3858 if (isIndex(index)) { 3859 splice.call(array, index, 1); 3860 } else { 3861 baseUnset(array, index); 3862 } 3863 } 3864 } 3865 return array; 3866 } 3867 3868 /** 3869 * The base implementation of `_.random` without support for returning 3870 * floating-point numbers. 3871 * 3872 * @private 3873 * @param {number} lower The lower bound. 3874 * @param {number} upper The upper bound. 3875 * @returns {number} Returns the random number. 3876 */ 3877 function baseRandom(lower, upper) { 3878 return lower + nativeFloor(nativeRandom() * (upper - lower + 1)); 3879 } 3880 3881 /** 3882 * The base implementation of `_.range` and `_.rangeRight` which doesn't 3883 * coerce arguments. 3884 * 3885 * @private 3886 * @param {number} start The start of the range. 3887 * @param {number} end The end of the range. 3888 * @param {number} step The value to increment or decrement by. 3889 * @param {boolean} [fromRight] Specify iterating from right to left. 3890 * @returns {Array} Returns the range of numbers. 3891 */ 3892 function baseRange(start, end, step, fromRight) { 3893 var index = -1, 3894 length = nativeMax(nativeCeil((end - start) / (step || 1)), 0), 3895 result = Array(length); 3896 3897 while (length--) { 3898 result[fromRight ? length : ++index] = start; 3899 start += step; 3900 } 3901 return result; 3902 } 3903 3904 /** 3905 * The base implementation of `_.repeat` which doesn't coerce arguments. 3906 * 3907 * @private 3908 * @param {string} string The string to repeat. 3909 * @param {number} n The number of times to repeat the string. 3910 * @returns {string} Returns the repeated string. 3911 */ 3912 function baseRepeat(string, n) { 3913 var result = ''; 3914 if (!string || n < 1 || n > MAX_SAFE_INTEGER) { 3915 return result; 3916 } 3917 // Leverage the exponentiation by squaring algorithm for a faster repeat. 3918 // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details. 3919 do { 3920 if (n % 2) { 3921 result += string; 3922 } 3923 n = nativeFloor(n / 2); 3924 if (n) { 3925 string += string; 3926 } 3927 } while (n); 3928 3929 return result; 3930 } 3931 3932 /** 3933 * The base implementation of `_.rest` which doesn't validate or coerce arguments. 3934 * 3935 * @private 3936 * @param {Function} func The function to apply a rest parameter to. 3937 * @param {number} [start=func.length-1] The start position of the rest parameter. 3938 * @returns {Function} Returns the new function. 3939 */ 3940 function baseRest(func, start) { 3941 return setToString(overRest(func, start, identity), func + ''); 3942 } 3943 3944 /** 3945 * The base implementation of `_.sample`. 3946 * 3947 * @private 3948 * @param {Array|Object} collection The collection to sample. 3949 * @returns {*} Returns the random element. 3950 */ 3951 function baseSample(collection) { 3952 return arraySample(values(collection)); 3953 } 3954 3955 /** 3956 * The base implementation of `_.sampleSize` without param guards. 3957 * 3958 * @private 3959 * @param {Array|Object} collection The collection to sample. 3960 * @param {number} n The number of elements to sample. 3961 * @returns {Array} Returns the random elements. 3962 */ 3963 function baseSampleSize(collection, n) { 3964 var array = values(collection); 3965 return shuffleSelf(array, baseClamp(n, 0, array.length)); 3966 } 3967 3968 /** 3969 * The base implementation of `_.set`. 3970 * 3971 * @private 3972 * @param {Object} object The object to modify. 3973 * @param {Array|string} path The path of the property to set. 3974 * @param {*} value The value to set. 3975 * @param {Function} [customizer] The function to customize path creation. 3976 * @returns {Object} Returns `object`. 3977 */ 3978 function baseSet(object, path, value, customizer) { 3979 if (!isObject(object)) { 3980 return object; 3981 } 3982 path = castPath(path, object); 3983 3984 var index = -1, 3985 length = path.length, 3986 lastIndex = length - 1, 3987 nested = object; 3988 3989 while (nested != null && ++index < length) { 3990 var key = toKey(path[index]), 3991 newValue = value; 3992 3993 if (key === '__proto__' || key === 'constructor' || key === 'prototype') { 3994 return object; 3995 } 3996 3997 if (index != lastIndex) { 3998 var objValue = nested[key]; 3999 newValue = customizer ? customizer(objValue, key, nested) : undefined; 4000 if (newValue === undefined) { 4001 newValue = isObject(objValue) 4002 ? objValue 4003 : (isIndex(path[index + 1]) ? [] : {}); 4004 } 4005 } 4006 assignValue(nested, key, newValue); 4007 nested = nested[key]; 4008 } 4009 return object; 4010 } 4011 4012 /** 4013 * The base implementation of `setData` without support for hot loop shorting. 4014 * 4015 * @private 4016 * @param {Function} func The function to associate metadata with. 4017 * @param {*} data The metadata. 4018 * @returns {Function} Returns `func`. 4019 */ 4020 var baseSetData = !metaMap ? identity : function(func, data) { 4021 metaMap.set(func, data); 4022 return func; 4023 }; 4024 4025 /** 4026 * The base implementation of `setToString` without support for hot loop shorting. 4027 * 4028 * @private 4029 * @param {Function} func The function to modify. 4030 * @param {Function} string The `toString` result. 4031 * @returns {Function} Returns `func`. 4032 */ 4033 var baseSetToString = !defineProperty ? identity : function(func, string) { 4034 return defineProperty(func, 'toString', { 4035 'configurable': true, 4036 'enumerable': false, 4037 'value': constant(string), 4038 'writable': true 4039 }); 4040 }; 4041 4042 /** 4043 * The base implementation of `_.shuffle`. 4044 * 4045 * @private 4046 * @param {Array|Object} collection The collection to shuffle. 4047 * @returns {Array} Returns the new shuffled array. 4048 */ 4049 function baseShuffle(collection) { 4050 return shuffleSelf(values(collection)); 4051 } 4052 4053 /** 4054 * The base implementation of `_.slice` without an iteratee call guard. 4055 * 4056 * @private 4057 * @param {Array} array The array to slice. 4058 * @param {number} [start=0] The start position. 4059 * @param {number} [end=array.length] The end position. 4060 * @returns {Array} Returns the slice of `array`. 4061 */ 4062 function baseSlice(array, start, end) { 4063 var index = -1, 4064 length = array.length; 4065 4066 if (start < 0) { 4067 start = -start > length ? 0 : (length + start); 4068 } 4069 end = end > length ? length : end; 4070 if (end < 0) { 4071 end += length; 4072 } 4073 length = start > end ? 0 : ((end - start) >>> 0); 4074 start >>>= 0; 4075 4076 var result = Array(length); 4077 while (++index < length) { 4078 result[index] = array[index + start]; 4079 } 4080 return result; 4081 } 4082 4083 /** 4084 * The base implementation of `_.some` without support for iteratee shorthands. 4085 * 4086 * @private 4087 * @param {Array|Object} collection The collection to iterate over. 4088 * @param {Function} predicate The function invoked per iteration. 4089 * @returns {boolean} Returns `true` if any element passes the predicate check, 4090 * else `false`. 4091 */ 4092 function baseSome(collection, predicate) { 4093 var result; 4094 4095 baseEach(collection, function(value, index, collection) { 4096 result = predicate(value, index, collection); 4097 return !result; 4098 }); 4099 return !!result; 4100 } 4101 4102 /** 4103 * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which 4104 * performs a binary search of `array` to determine the index at which `value` 4105 * should be inserted into `array` in order to maintain its sort order. 4106 * 4107 * @private 4108 * @param {Array} array The sorted array to inspect. 4109 * @param {*} value The value to evaluate. 4110 * @param {boolean} [retHighest] Specify returning the highest qualified index. 4111 * @returns {number} Returns the index at which `value` should be inserted 4112 * into `array`. 4113 */ 4114 function baseSortedIndex(array, value, retHighest) { 4115 var low = 0, 4116 high = array == null ? low : array.length; 4117 4118 if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) { 4119 while (low < high) { 4120 var mid = (low + high) >>> 1, 4121 computed = array[mid]; 4122 4123 if (computed !== null && !isSymbol(computed) && 4124 (retHighest ? (computed <= value) : (computed < value))) { 4125 low = mid + 1; 4126 } else { 4127 high = mid; 4128 } 4129 } 4130 return high; 4131 } 4132 return baseSortedIndexBy(array, value, identity, retHighest); 4133 } 4134 4135 /** 4136 * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy` 4137 * which invokes `iteratee` for `value` and each element of `array` to compute 4138 * their sort ranking. The iteratee is invoked with one argument; (value). 4139 * 4140 * @private 4141 * @param {Array} array The sorted array to inspect. 4142 * @param {*} value The value to evaluate. 4143 * @param {Function} iteratee The iteratee invoked per element. 4144 * @param {boolean} [retHighest] Specify returning the highest qualified index. 4145 * @returns {number} Returns the index at which `value` should be inserted 4146 * into `array`. 4147 */ 4148 function baseSortedIndexBy(array, value, iteratee, retHighest) { 4149 var low = 0, 4150 high = array == null ? 0 : array.length; 4151 if (high === 0) { 4152 return 0; 4153 } 4154 4155 value = iteratee(value); 4156 var valIsNaN = value !== value, 4157 valIsNull = value === null, 4158 valIsSymbol = isSymbol(value), 4159 valIsUndefined = value === undefined; 4160 4161 while (low < high) { 4162 var mid = nativeFloor((low + high) / 2), 4163 computed = iteratee(array[mid]), 4164 othIsDefined = computed !== undefined, 4165 othIsNull = computed === null, 4166 othIsReflexive = computed === computed, 4167 othIsSymbol = isSymbol(computed); 4168 4169 if (valIsNaN) { 4170 var setLow = retHighest || othIsReflexive; 4171 } else if (valIsUndefined) { 4172 setLow = othIsReflexive && (retHighest || othIsDefined); 4173 } else if (valIsNull) { 4174 setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull); 4175 } else if (valIsSymbol) { 4176 setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol); 4177 } else if (othIsNull || othIsSymbol) { 4178 setLow = false; 4179 } else { 4180 setLow = retHighest ? (computed <= value) : (computed < value); 4181 } 4182 if (setLow) { 4183 low = mid + 1; 4184 } else { 4185 high = mid; 4186 } 4187 } 4188 return nativeMin(high, MAX_ARRAY_INDEX); 4189 } 4190 4191 /** 4192 * The base implementation of `_.sortedUniq` and `_.sortedUniqBy` without 4193 * support for iteratee shorthands. 4194 * 4195 * @private 4196 * @param {Array} array The array to inspect. 4197 * @param {Function} [iteratee] The iteratee invoked per element. 4198 * @returns {Array} Returns the new duplicate free array. 4199 */ 4200 function baseSortedUniq(array, iteratee) { 4201 var index = -1, 4202 length = array.length, 4203 resIndex = 0, 4204 result = []; 4205 4206 while (++index < length) { 4207 var value = array[index], 4208 computed = iteratee ? iteratee(value) : value; 4209 4210 if (!index || !eq(computed, seen)) { 4211 var seen = computed; 4212 result[resIndex++] = value === 0 ? 0 : value; 4213 } 4214 } 4215 return result; 4216 } 4217 4218 /** 4219 * The base implementation of `_.toNumber` which doesn't ensure correct 4220 * conversions of binary, hexadecimal, or octal string values. 4221 * 4222 * @private 4223 * @param {*} value The value to process. 4224 * @returns {number} Returns the number. 4225 */ 4226 function baseToNumber(value) { 4227 if (typeof value == 'number') { 4228 return value; 4229 } 4230 if (isSymbol(value)) { 4231 return NAN; 4232 } 4233 return +value; 4234 } 4235 4236 /** 4237 * The base implementation of `_.toString` which doesn't convert nullish 4238 * values to empty strings. 4239 * 4240 * @private 4241 * @param {*} value The value to process. 4242 * @returns {string} Returns the string. 4243 */ 4244 function baseToString(value) { 4245 // Exit early for strings to avoid a performance hit in some environments. 4246 if (typeof value == 'string') { 4247 return value; 4248 } 4249 if (isArray(value)) { 4250 // Recursively convert values (susceptible to call stack limits). 4251 return arrayMap(value, baseToString) + ''; 4252 } 4253 if (isSymbol(value)) { 4254 return symbolToString ? symbolToString.call(value) : ''; 4255 } 4256 var result = (value + ''); 4257 return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result; 4258 } 4259 4260 /** 4261 * The base implementation of `_.uniqBy` without support for iteratee shorthands. 4262 * 4263 * @private 4264 * @param {Array} array The array to inspect. 4265 * @param {Function} [iteratee] The iteratee invoked per element. 4266 * @param {Function} [comparator] The comparator invoked per element. 4267 * @returns {Array} Returns the new duplicate free array. 4268 */ 4269 function baseUniq(array, iteratee, comparator) { 4270 var index = -1, 4271 includes = arrayIncludes, 4272 length = array.length, 4273 isCommon = true, 4274 result = [], 4275 seen = result; 4276 4277 if (comparator) { 4278 isCommon = false; 4279 includes = arrayIncludesWith; 4280 } 4281 else if (length >= LARGE_ARRAY_SIZE) { 4282 var set = iteratee ? null : createSet(array); 4283 if (set) { 4284 return setToArray(set); 4285 } 4286 isCommon = false; 4287 includes = cacheHas; 4288 seen = new SetCache; 4289 } 4290 else { 4291 seen = iteratee ? [] : result; 4292 } 4293 outer: 4294 while (++index < length) { 4295 var value = array[index], 4296 computed = iteratee ? iteratee(value) : value; 4297 4298 value = (comparator || value !== 0) ? value : 0; 4299 if (isCommon && computed === computed) { 4300 var seenIndex = seen.length; 4301 while (seenIndex--) { 4302 if (seen[seenIndex] === computed) { 4303 continue outer; 4304 } 4305 } 4306 if (iteratee) { 4307 seen.push(computed); 4308 } 4309 result.push(value); 4310 } 4311 else if (!includes(seen, computed, comparator)) { 4312 if (seen !== result) { 4313 seen.push(computed); 4314 } 4315 result.push(value); 4316 } 4317 } 4318 return result; 4319 } 4320 4321 /** 4322 * The base implementation of `_.unset`. 4323 * 4324 * @private 4325 * @param {Object} object The object to modify. 4326 * @param {Array|string} path The property path to unset. 4327 * @returns {boolean} Returns `true` if the property is deleted, else `false`. 4328 */ 4329 function baseUnset(object, path) { 4330 path = castPath(path, object); 4331 object = parent(object, path); 4332 return object == null || delete object[toKey(last(path))]; 4333 } 4334 4335 /** 4336 * The base implementation of `_.update`. 4337 * 4338 * @private 4339 * @param {Object} object The object to modify. 4340 * @param {Array|string} path The path of the property to update. 4341 * @param {Function} updater The function to produce the updated value. 4342 * @param {Function} [customizer] The function to customize path creation. 4343 * @returns {Object} Returns `object`. 4344 */ 4345 function baseUpdate(object, path, updater, customizer) { 4346 return baseSet(object, path, updater(baseGet(object, path)), customizer); 4347 } 4348 4349 /** 4350 * The base implementation of methods like `_.dropWhile` and `_.takeWhile` 4351 * without support for iteratee shorthands. 4352 * 4353 * @private 4354 * @param {Array} array The array to query. 4355 * @param {Function} predicate The function invoked per iteration. 4356 * @param {boolean} [isDrop] Specify dropping elements instead of taking them. 4357 * @param {boolean} [fromRight] Specify iterating from right to left. 4358 * @returns {Array} Returns the slice of `array`. 4359 */ 4360 function baseWhile(array, predicate, isDrop, fromRight) { 4361 var length = array.length, 4362 index = fromRight ? length : -1; 4363 4364 while ((fromRight ? index-- : ++index < length) && 4365 predicate(array[index], index, array)) {} 4366 4367 return isDrop 4368 ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length)) 4369 : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index)); 4370 } 4371 4372 /** 4373 * The base implementation of `wrapperValue` which returns the result of 4374 * performing a sequence of actions on the unwrapped `value`, where each 4375 * successive action is supplied the return value of the previous. 4376 * 4377 * @private 4378 * @param {*} value The unwrapped value. 4379 * @param {Array} actions Actions to perform to resolve the unwrapped value. 4380 * @returns {*} Returns the resolved value. 4381 */ 4382 function baseWrapperValue(value, actions) { 4383 var result = value; 4384 if (result instanceof LazyWrapper) { 4385 result = result.value(); 4386 } 4387 return arrayReduce(actions, function(result, action) { 4388 return action.func.apply(action.thisArg, arrayPush([result], action.args)); 4389 }, result); 4390 } 4391 4392 /** 4393 * The base implementation of methods like `_.xor`, without support for 4394 * iteratee shorthands, that accepts an array of arrays to inspect. 4395 * 4396 * @private 4397 * @param {Array} arrays The arrays to inspect. 4398 * @param {Function} [iteratee] The iteratee invoked per element. 4399 * @param {Function} [comparator] The comparator invoked per element. 4400 * @returns {Array} Returns the new array of values. 4401 */ 4402 function baseXor(arrays, iteratee, comparator) { 4403 var length = arrays.length; 4404 if (length < 2) { 4405 return length ? baseUniq(arrays[0]) : []; 4406 } 4407 var index = -1, 4408 result = Array(length); 4409 4410 while (++index < length) { 4411 var array = arrays[index], 4412 othIndex = -1; 4413 4414 while (++othIndex < length) { 4415 if (othIndex != index) { 4416 result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator); 4417 } 4418 } 4419 } 4420 return baseUniq(baseFlatten(result, 1), iteratee, comparator); 4421 } 4422 4423 /** 4424 * This base implementation of `_.zipObject` which assigns values using `assignFunc`. 4425 * 4426 * @private 4427 * @param {Array} props The property identifiers. 4428 * @param {Array} values The property values. 4429 * @param {Function} assignFunc The function to assign values. 4430 * @returns {Object} Returns the new object. 4431 */ 4432 function baseZipObject(props, values, assignFunc) { 4433 var index = -1, 4434 length = props.length, 4435 valsLength = values.length, 4436 result = {}; 4437 4438 while (++index < length) { 4439 var value = index < valsLength ? values[index] : undefined; 4440 assignFunc(result, props[index], value); 4441 } 4442 return result; 4443 } 4444 4445 /** 4446 * Casts `value` to an empty array if it's not an array like object. 4447 * 4448 * @private 4449 * @param {*} value The value to inspect. 4450 * @returns {Array|Object} Returns the cast array-like object. 4451 */ 4452 function castArrayLikeObject(value) { 4453 return isArrayLikeObject(value) ? value : []; 4454 } 4455 4456 /** 4457 * Casts `value` to `identity` if it's not a function. 4458 * 4459 * @private 4460 * @param {*} value The value to inspect. 4461 * @returns {Function} Returns cast function. 4462 */ 4463 function castFunction(value) { 4464 return typeof value == 'function' ? value : identity; 4465 } 4466 4467 /** 4468 * Casts `value` to a path array if it's not one. 4469 * 4470 * @private 4471 * @param {*} value The value to inspect. 4472 * @param {Object} [object] The object to query keys on. 4473 * @returns {Array} Returns the cast property path array. 4474 */ 4475 function castPath(value, object) { 4476 if (isArray(value)) { 4477 return value; 4478 } 4479 return isKey(value, object) ? [value] : stringToPath(toString(value)); 4480 } 4481 4482 /** 4483 * A `baseRest` alias which can be replaced with `identity` by module 4484 * replacement plugins. 4485 * 4486 * @private 4487 * @type {Function} 4488 * @param {Function} func The function to apply a rest parameter to. 4489 * @returns {Function} Returns the new function. 4490 */ 4491 var castRest = baseRest; 4492 4493 /** 4494 * Casts `array` to a slice if it's needed. 4495 * 4496 * @private 4497 * @param {Array} array The array to inspect. 4498 * @param {number} start The start position. 4499 * @param {number} [end=array.length] The end position. 4500 * @returns {Array} Returns the cast slice. 4501 */ 4502 function castSlice(array, start, end) { 4503 var length = array.length; 4504 end = end === undefined ? length : end; 4505 return (!start && end >= length) ? array : baseSlice(array, start, end); 4506 } 4507 4508 /** 4509 * A simple wrapper around the global [`clearTimeout`](https://mdn.io/clearTimeout). 4510 * 4511 * @private 4512 * @param {number|Object} id The timer id or timeout object of the timer to clear. 4513 */ 4514 var clearTimeout = ctxClearTimeout || function(id) { 4515 return root.clearTimeout(id); 4516 }; 4517 4518 /** 4519 * Creates a clone of `buffer`. 4520 * 4521 * @private 4522 * @param {Buffer} buffer The buffer to clone. 4523 * @param {boolean} [isDeep] Specify a deep clone. 4524 * @returns {Buffer} Returns the cloned buffer. 4525 */ 4526 function cloneBuffer(buffer, isDeep) { 4527 if (isDeep) { 4528 return buffer.slice(); 4529 } 4530 var length = buffer.length, 4531 result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length); 4532 4533 buffer.copy(result); 4534 return result; 4535 } 4536 4537 /** 4538 * Creates a clone of `arrayBuffer`. 4539 * 4540 * @private 4541 * @param {ArrayBuffer} arrayBuffer The array buffer to clone. 4542 * @returns {ArrayBuffer} Returns the cloned array buffer. 4543 */ 4544 function cloneArrayBuffer(arrayBuffer) { 4545 var result = new arrayBuffer.constructor(arrayBuffer.byteLength); 4546 new Uint8Array(result).set(new Uint8Array(arrayBuffer)); 4547 return result; 4548 } 4549 4550 /** 4551 * Creates a clone of `dataView`. 4552 * 4553 * @private 4554 * @param {Object} dataView The data view to clone. 4555 * @param {boolean} [isDeep] Specify a deep clone. 4556 * @returns {Object} Returns the cloned data view. 4557 */ 4558 function cloneDataView(dataView, isDeep) { 4559 var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer; 4560 return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength); 4561 } 4562 4563 /** 4564 * Creates a clone of `regexp`. 4565 * 4566 * @private 4567 * @param {Object} regexp The regexp to clone. 4568 * @returns {Object} Returns the cloned regexp. 4569 */ 4570 function cloneRegExp(regexp) { 4571 var result = new regexp.constructor(regexp.source, reFlags.exec(regexp)); 4572 result.lastIndex = regexp.lastIndex; 4573 return result; 4574 } 4575 4576 /** 4577 * Creates a clone of the `symbol` object. 4578 * 4579 * @private 4580 * @param {Object} symbol The symbol object to clone. 4581 * @returns {Object} Returns the cloned symbol object. 4582 */ 4583 function cloneSymbol(symbol) { 4584 return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {}; 4585 } 4586 4587 /** 4588 * Creates a clone of `typedArray`. 4589 * 4590 * @private 4591 * @param {Object} typedArray The typed array to clone. 4592 * @param {boolean} [isDeep] Specify a deep clone. 4593 * @returns {Object} Returns the cloned typed array. 4594 */ 4595 function cloneTypedArray(typedArray, isDeep) { 4596 var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer; 4597 return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length); 4598 } 4599 4600 /** 4601 * Compares values to sort them in ascending order. 4602 * 4603 * @private 4604 * @param {*} value The value to compare. 4605 * @param {*} other The other value to compare. 4606 * @returns {number} Returns the sort order indicator for `value`. 4607 */ 4608 function compareAscending(value, other) { 4609 if (value !== other) { 4610 var valIsDefined = value !== undefined, 4611 valIsNull = value === null, 4612 valIsReflexive = value === value, 4613 valIsSymbol = isSymbol(value); 4614 4615 var othIsDefined = other !== undefined, 4616 othIsNull = other === null, 4617 othIsReflexive = other === other, 4618 othIsSymbol = isSymbol(other); 4619 4620 if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) || 4621 (valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) || 4622 (valIsNull && othIsDefined && othIsReflexive) || 4623 (!valIsDefined && othIsReflexive) || 4624 !valIsReflexive) { 4625 return 1; 4626 } 4627 if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) || 4628 (othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) || 4629 (othIsNull && valIsDefined && valIsReflexive) || 4630 (!othIsDefined && valIsReflexive) || 4631 !othIsReflexive) { 4632 return -1; 4633 } 4634 } 4635 return 0; 4636 } 4637 4638 /** 4639 * Used by `_.orderBy` to compare multiple properties of a value to another 4640 * and stable sort them. 4641 * 4642 * If `orders` is unspecified, all values are sorted in ascending order. Otherwise, 4643 * specify an order of "desc" for descending or "asc" for ascending sort order 4644 * of corresponding values. 4645 * 4646 * @private 4647 * @param {Object} object The object to compare. 4648 * @param {Object} other The other object to compare. 4649 * @param {boolean[]|string[]} orders The order to sort by for each property. 4650 * @returns {number} Returns the sort order indicator for `object`. 4651 */ 4652 function compareMultiple(object, other, orders) { 4653 var index = -1, 4654 objCriteria = object.criteria, 4655 othCriteria = other.criteria, 4656 length = objCriteria.length, 4657 ordersLength = orders.length; 4658 4659 while (++index < length) { 4660 var result = compareAscending(objCriteria[index], othCriteria[index]); 4661 if (result) { 4662 if (index >= ordersLength) { 4663 return result; 4664 } 4665 var order = orders[index]; 4666 return result * (order == 'desc' ? -1 : 1); 4667 } 4668 } 4669 // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications 4670 // that causes it, under certain circumstances, to provide the same value for 4671 // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247 4672 // for more details. 4673 // 4674 // This also ensures a stable sort in V8 and other engines. 4675 // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details. 4676 return object.index - other.index; 4677 } 4678 4679 /** 4680 * Creates an array that is the composition of partially applied arguments, 4681 * placeholders, and provided arguments into a single array of arguments. 4682 * 4683 * @private 4684 * @param {Array} args The provided arguments. 4685 * @param {Array} partials The arguments to prepend to those provided. 4686 * @param {Array} holders The `partials` placeholder indexes. 4687 * @params {boolean} [isCurried] Specify composing for a curried function. 4688 * @returns {Array} Returns the new array of composed arguments. 4689 */ 4690 function composeArgs(args, partials, holders, isCurried) { 4691 var argsIndex = -1, 4692 argsLength = args.length, 4693 holdersLength = holders.length, 4694 leftIndex = -1, 4695 leftLength = partials.length, 4696 rangeLength = nativeMax(argsLength - holdersLength, 0), 4697 result = Array(leftLength + rangeLength), 4698 isUncurried = !isCurried; 4699 4700 while (++leftIndex < leftLength) { 4701 result[leftIndex] = partials[leftIndex]; 4702 } 4703 while (++argsIndex < holdersLength) { 4704 if (isUncurried || argsIndex < argsLength) { 4705 result[holders[argsIndex]] = args[argsIndex]; 4706 } 4707 } 4708 while (rangeLength--) { 4709 result[leftIndex++] = args[argsIndex++]; 4710 } 4711 return result; 4712 } 4713 4714 /** 4715 * This function is like `composeArgs` except that the arguments composition 4716 * is tailored for `_.partialRight`. 4717 * 4718 * @private 4719 * @param {Array} args The provided arguments. 4720 * @param {Array} partials The arguments to append to those provided. 4721 * @param {Array} holders The `partials` placeholder indexes. 4722 * @params {boolean} [isCurried] Specify composing for a curried function. 4723 * @returns {Array} Returns the new array of composed arguments. 4724 */ 4725 function composeArgsRight(args, partials, holders, isCurried) { 4726 var argsIndex = -1, 4727 argsLength = args.length, 4728 holdersIndex = -1, 4729 holdersLength = holders.length, 4730 rightIndex = -1, 4731 rightLength = partials.length, 4732 rangeLength = nativeMax(argsLength - holdersLength, 0), 4733 result = Array(rangeLength + rightLength), 4734 isUncurried = !isCurried; 4735 4736 while (++argsIndex < rangeLength) { 4737 result[argsIndex] = args[argsIndex]; 4738 } 4739 var offset = argsIndex; 4740 while (++rightIndex < rightLength) { 4741 result[offset + rightIndex] = partials[rightIndex]; 4742 } 4743 while (++holdersIndex < holdersLength) { 4744 if (isUncurried || argsIndex < argsLength) { 4745 result[offset + holders[holdersIndex]] = args[argsIndex++]; 4746 } 4747 } 4748 return result; 4749 } 4750 4751 /** 4752 * Copies the values of `source` to `array`. 4753 * 4754 * @private 4755 * @param {Array} source The array to copy values from. 4756 * @param {Array} [array=[]] The array to copy values to. 4757 * @returns {Array} Returns `array`. 4758 */ 4759 function copyArray(source, array) { 4760 var index = -1, 4761 length = source.length; 4762 4763 array || (array = Array(length)); 4764 while (++index < length) { 4765 array[index] = source[index]; 4766 } 4767 return array; 4768 } 4769 4770 /** 4771 * Copies properties of `source` to `object`. 4772 * 4773 * @private 4774 * @param {Object} source The object to copy properties from. 4775 * @param {Array} props The property identifiers to copy. 4776 * @param {Object} [object={}] The object to copy properties to. 4777 * @param {Function} [customizer] The function to customize copied values. 4778 * @returns {Object} Returns `object`. 4779 */ 4780 function copyObject(source, props, object, customizer) { 4781 var isNew = !object; 4782 object || (object = {}); 4783 4784 var index = -1, 4785 length = props.length; 4786 4787 while (++index < length) { 4788 var key = props[index]; 4789 4790 var newValue = customizer 4791 ? customizer(object[key], source[key], key, object, source) 4792 : undefined; 4793 4794 if (newValue === undefined) { 4795 newValue = source[key]; 4796 } 4797 if (isNew) { 4798 baseAssignValue(object, key, newValue); 4799 } else { 4800 assignValue(object, key, newValue); 4801 } 4802 } 4803 return object; 4804 } 4805 4806 /** 4807 * Copies own symbols of `source` to `object`. 4808 * 4809 * @private 4810 * @param {Object} source The object to copy symbols from. 4811 * @param {Object} [object={}] The object to copy symbols to. 4812 * @returns {Object} Returns `object`. 4813 */ 4814 function copySymbols(source, object) { 4815 return copyObject(source, getSymbols(source), object); 4816 } 4817 4818 /** 4819 * Copies own and inherited symbols of `source` to `object`. 4820 * 4821 * @private 4822 * @param {Object} source The object to copy symbols from. 4823 * @param {Object} [object={}] The object to copy symbols to. 4824 * @returns {Object} Returns `object`. 4825 */ 4826 function copySymbolsIn(source, object) { 4827 return copyObject(source, getSymbolsIn(source), object); 4828 } 4829 4830 /** 4831 * Creates a function like `_.groupBy`. 4832 * 4833 * @private 4834 * @param {Function} setter The function to set accumulator values. 4835 * @param {Function} [initializer] The accumulator object initializer. 4836 * @returns {Function} Returns the new aggregator function. 4837 */ 4838 function createAggregator(setter, initializer) { 4839 return function(collection, iteratee) { 4840 var func = isArray(collection) ? arrayAggregator : baseAggregator, 4841 accumulator = initializer ? initializer() : {}; 4842 4843 return func(collection, setter, getIteratee(iteratee, 2), accumulator); 4844 }; 4845 } 4846 4847 /** 4848 * Creates a function like `_.assign`. 4849 * 4850 * @private 4851 * @param {Function} assigner The function to assign values. 4852 * @returns {Function} Returns the new assigner function. 4853 */ 4854 function createAssigner(assigner) { 4855 return baseRest(function(object, sources) { 4856 var index = -1, 4857 length = sources.length, 4858 customizer = length > 1 ? sources[length - 1] : undefined, 4859 guard = length > 2 ? sources[2] : undefined; 4860 4861 customizer = (assigner.length > 3 && typeof customizer == 'function') 4862 ? (length--, customizer) 4863 : undefined; 4864 4865 if (guard && isIterateeCall(sources[0], sources[1], guard)) { 4866 customizer = length < 3 ? undefined : customizer; 4867 length = 1; 4868 } 4869 object = Object(object); 4870 while (++index < length) { 4871 var source = sources[index]; 4872 if (source) { 4873 assigner(object, source, index, customizer); 4874 } 4875 } 4876 return object; 4877 }); 4878 } 4879 4880 /** 4881 * Creates a `baseEach` or `baseEachRight` function. 4882 * 4883 * @private 4884 * @param {Function} eachFunc The function to iterate over a collection. 4885 * @param {boolean} [fromRight] Specify iterating from right to left. 4886 * @returns {Function} Returns the new base function. 4887 */ 4888 function createBaseEach(eachFunc, fromRight) { 4889 return function(collection, iteratee) { 4890 if (collection == null) { 4891 return collection; 4892 } 4893 if (!isArrayLike(collection)) { 4894 return eachFunc(collection, iteratee); 4895 } 4896 var length = collection.length, 4897 index = fromRight ? length : -1, 4898 iterable = Object(collection); 4899 4900 while ((fromRight ? index-- : ++index < length)) { 4901 if (iteratee(iterable[index], index, iterable) === false) { 4902 break; 4903 } 4904 } 4905 return collection; 4906 }; 4907 } 4908 4909 /** 4910 * Creates a base function for methods like `_.forIn` and `_.forOwn`. 4911 * 4912 * @private 4913 * @param {boolean} [fromRight] Specify iterating from right to left. 4914 * @returns {Function} Returns the new base function. 4915 */ 4916 function createBaseFor(fromRight) { 4917 return function(object, iteratee, keysFunc) { 4918 var index = -1, 4919 iterable = Object(object), 4920 props = keysFunc(object), 4921 length = props.length; 4922 4923 while (length--) { 4924 var key = props[fromRight ? length : ++index]; 4925 if (iteratee(iterable[key], key, iterable) === false) { 4926 break; 4927 } 4928 } 4929 return object; 4930 }; 4931 } 4932 4933 /** 4934 * Creates a function that wraps `func` to invoke it with the optional `this` 4935 * binding of `thisArg`. 4936 * 4937 * @private 4938 * @param {Function} func The function to wrap. 4939 * @param {number} bitmask The bitmask flags. See `createWrap` for more details. 4940 * @param {*} [thisArg] The `this` binding of `func`. 4941 * @returns {Function} Returns the new wrapped function. 4942 */ 4943 function createBind(func, bitmask, thisArg) { 4944 var isBind = bitmask & WRAP_BIND_FLAG, 4945 Ctor = createCtor(func); 4946 4947 function wrapper() { 4948 var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func; 4949 return fn.apply(isBind ? thisArg : this, arguments); 4950 } 4951 return wrapper; 4952 } 4953 4954 /** 4955 * Creates a function like `_.lowerFirst`. 4956 * 4957 * @private 4958 * @param {string} methodName The name of the `String` case method to use. 4959 * @returns {Function} Returns the new case function. 4960 */ 4961 function createCaseFirst(methodName) { 4962 return function(string) { 4963 string = toString(string); 4964 4965 var strSymbols = hasUnicode(string) 4966 ? stringToArray(string) 4967 : undefined; 4968 4969 var chr = strSymbols 4970 ? strSymbols[0] 4971 : string.charAt(0); 4972 4973 var trailing = strSymbols 4974 ? castSlice(strSymbols, 1).join('') 4975 : string.slice(1); 4976 4977 return chr[methodName]() + trailing; 4978 }; 4979 } 4980 4981 /** 4982 * Creates a function like `_.camelCase`. 4983 * 4984 * @private 4985 * @param {Function} callback The function to combine each word. 4986 * @returns {Function} Returns the new compounder function. 4987 */ 4988 function createCompounder(callback) { 4989 return function(string) { 4990 return arrayReduce(words(deburr(string).replace(reApos, '')), callback, ''); 4991 }; 4992 } 4993 4994 /** 4995 * Creates a function that produces an instance of `Ctor` regardless of 4996 * whether it was invoked as part of a `new` expression or by `call` or `apply`. 4997 * 4998 * @private 4999 * @param {Function} Ctor The constructor to wrap. 5000 * @returns {Function} Returns the new wrapped function. 5001 */ 5002 function createCtor(Ctor) { 5003 return function() { 5004 // Use a `switch` statement to work with class constructors. See 5005 // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist 5006 // for more details. 5007 var args = arguments; 5008 switch (args.length) { 5009 case 0: return new Ctor; 5010 case 1: return new Ctor(args[0]); 5011 case 2: return new Ctor(args[0], args[1]); 5012 case 3: return new Ctor(args[0], args[1], args[2]); 5013 case 4: return new Ctor(args[0], args[1], args[2], args[3]); 5014 case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]); 5015 case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]); 5016 case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]); 5017 } 5018 var thisBinding = baseCreate(Ctor.prototype), 5019 result = Ctor.apply(thisBinding, args); 5020 5021 // Mimic the constructor's `return` behavior. 5022 // See https://es5.github.io/#x13.2.2 for more details. 5023 return isObject(result) ? result : thisBinding; 5024 }; 5025 } 5026 5027 /** 5028 * Creates a function that wraps `func` to enable currying. 5029 * 5030 * @private 5031 * @param {Function} func The function to wrap. 5032 * @param {number} bitmask The bitmask flags. See `createWrap` for more details. 5033 * @param {number} arity The arity of `func`. 5034 * @returns {Function} Returns the new wrapped function. 5035 */ 5036 function createCurry(func, bitmask, arity) { 5037 var Ctor = createCtor(func); 5038 5039 function wrapper() { 5040 var length = arguments.length, 5041 args = Array(length), 5042 index = length, 5043 placeholder = getHolder(wrapper); 5044 5045 while (index--) { 5046 args[index] = arguments[index]; 5047 } 5048 var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder) 5049 ? [] 5050 : replaceHolders(args, placeholder); 5051 5052 length -= holders.length; 5053 if (length < arity) { 5054 return createRecurry( 5055 func, bitmask, createHybrid, wrapper.placeholder, undefined, 5056 args, holders, undefined, undefined, arity - length); 5057 } 5058 var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func; 5059 return apply(fn, this, args); 5060 } 5061 return wrapper; 5062 } 5063 5064 /** 5065 * Creates a `_.find` or `_.findLast` function. 5066 * 5067 * @private 5068 * @param {Function} findIndexFunc The function to find the collection index. 5069 * @returns {Function} Returns the new find function. 5070 */ 5071 function createFind(findIndexFunc) { 5072 return function(collection, predicate, fromIndex) { 5073 var iterable = Object(collection); 5074 if (!isArrayLike(collection)) { 5075 var iteratee = getIteratee(predicate, 3); 5076 collection = keys(collection); 5077 predicate = function(key) { return iteratee(iterable[key], key, iterable); }; 5078 } 5079 var index = findIndexFunc(collection, predicate, fromIndex); 5080 return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined; 5081 }; 5082 } 5083 5084 /** 5085 * Creates a `_.flow` or `_.flowRight` function. 5086 * 5087 * @private 5088 * @param {boolean} [fromRight] Specify iterating from right to left. 5089 * @returns {Function} Returns the new flow function. 5090 */ 5091 function createFlow(fromRight) { 5092 return flatRest(function(funcs) { 5093 var length = funcs.length, 5094 index = length, 5095 prereq = LodashWrapper.prototype.thru; 5096 5097 if (fromRight) { 5098 funcs.reverse(); 5099 } 5100 while (index--) { 5101 var func = funcs[index]; 5102 if (typeof func != 'function') { 5103 throw new TypeError(FUNC_ERROR_TEXT); 5104 } 5105 if (prereq && !wrapper && getFuncName(func) == 'wrapper') { 5106 var wrapper = new LodashWrapper([], true); 5107 } 5108 } 5109 index = wrapper ? index : length; 5110 while (++index < length) { 5111 func = funcs[index]; 5112 5113 var funcName = getFuncName(func), 5114 data = funcName == 'wrapper' ? getData(func) : undefined; 5115 5116 if (data && isLaziable(data[0]) && 5117 data[1] == (WRAP_ARY_FLAG | WRAP_CURRY_FLAG | WRAP_PARTIAL_FLAG | WRAP_REARG_FLAG) && 5118 !data[4].length && data[9] == 1 5119 ) { 5120 wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]); 5121 } else { 5122 wrapper = (func.length == 1 && isLaziable(func)) 5123 ? wrapper[funcName]() 5124 : wrapper.thru(func); 5125 } 5126 } 5127 return function() { 5128 var args = arguments, 5129 value = args[0]; 5130 5131 if (wrapper && args.length == 1 && isArray(value)) { 5132 return wrapper.plant(value).value(); 5133 } 5134 var index = 0, 5135 result = length ? funcs[index].apply(this, args) : value; 5136 5137 while (++index < length) { 5138 result = funcs[index].call(this, result); 5139 } 5140 return result; 5141 }; 5142 }); 5143 } 5144 5145 /** 5146 * Creates a function that wraps `func` to invoke it with optional `this` 5147 * binding of `thisArg`, partial application, and currying. 5148 * 5149 * @private 5150 * @param {Function|string} func The function or method name to wrap. 5151 * @param {number} bitmask The bitmask flags. See `createWrap` for more details. 5152 * @param {*} [thisArg] The `this` binding of `func`. 5153 * @param {Array} [partials] The arguments to prepend to those provided to 5154 * the new function. 5155 * @param {Array} [holders] The `partials` placeholder indexes. 5156 * @param {Array} [partialsRight] The arguments to append to those provided 5157 * to the new function. 5158 * @param {Array} [holdersRight] The `partialsRight` placeholder indexes. 5159 * @param {Array} [argPos] The argument positions of the new function. 5160 * @param {number} [ary] The arity cap of `func`. 5161 * @param {number} [arity] The arity of `func`. 5162 * @returns {Function} Returns the new wrapped function. 5163 */ 5164 function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) { 5165 var isAry = bitmask & WRAP_ARY_FLAG, 5166 isBind = bitmask & WRAP_BIND_FLAG, 5167 isBindKey = bitmask & WRAP_BIND_KEY_FLAG, 5168 isCurried = bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG), 5169 isFlip = bitmask & WRAP_FLIP_FLAG, 5170 Ctor = isBindKey ? undefined : createCtor(func); 5171 5172 function wrapper() { 5173 var length = arguments.length, 5174 args = Array(length), 5175 index = length; 5176 5177 while (index--) { 5178 args[index] = arguments[index]; 5179 } 5180 if (isCurried) { 5181 var placeholder = getHolder(wrapper), 5182 holdersCount = countHolders(args, placeholder); 5183 } 5184 if (partials) { 5185 args = composeArgs(args, partials, holders, isCurried); 5186 } 5187 if (partialsRight) { 5188 args = composeArgsRight(args, partialsRight, holdersRight, isCurried); 5189 } 5190 length -= holdersCount; 5191 if (isCurried && length < arity) { 5192 var newHolders = replaceHolders(args, placeholder); 5193 return createRecurry( 5194 func, bitmask, createHybrid, wrapper.placeholder, thisArg, 5195 args, newHolders, argPos, ary, arity - length 5196 ); 5197 } 5198 var thisBinding = isBind ? thisArg : this, 5199 fn = isBindKey ? thisBinding[func] : func; 5200 5201 length = args.length; 5202 if (argPos) { 5203 args = reorder(args, argPos); 5204 } else if (isFlip && length > 1) { 5205 args.reverse(); 5206 } 5207 if (isAry && ary < length) { 5208 args.length = ary; 5209 } 5210 if (this && this !== root && this instanceof wrapper) { 5211 fn = Ctor || createCtor(fn); 5212 } 5213 return fn.apply(thisBinding, args); 5214 } 5215 return wrapper; 5216 } 5217 5218 /** 5219 * Creates a function like `_.invertBy`. 5220 * 5221 * @private 5222 * @param {Function} setter The function to set accumulator values. 5223 * @param {Function} toIteratee The function to resolve iteratees. 5224 * @returns {Function} Returns the new inverter function. 5225 */ 5226 function createInverter(setter, toIteratee) { 5227 return function(object, iteratee) { 5228 return baseInverter(object, setter, toIteratee(iteratee), {}); 5229 }; 5230 } 5231 5232 /** 5233 * Creates a function that performs a mathematical operation on two values. 5234 * 5235 * @private 5236 * @param {Function} operator The function to perform the operation. 5237 * @param {number} [defaultValue] The value used for `undefined` arguments. 5238 * @returns {Function} Returns the new mathematical operation function. 5239 */ 5240 function createMathOperation(operator, defaultValue) { 5241 return function(value, other) { 5242 var result; 5243 if (value === undefined && other === undefined) { 5244 return defaultValue; 5245 } 5246 if (value !== undefined) { 5247 result = value; 5248 } 5249 if (other !== undefined) { 5250 if (result === undefined) { 5251 return other; 5252 } 5253 if (typeof value == 'string' || typeof other == 'string') { 5254 value = baseToString(value); 5255 other = baseToString(other); 5256 } else { 5257 value = baseToNumber(value); 5258 other = baseToNumber(other); 5259 } 5260 result = operator(value, other); 5261 } 5262 return result; 5263 }; 5264 } 5265 5266 /** 5267 * Creates a function like `_.over`. 5268 * 5269 * @private 5270 * @param {Function} arrayFunc The function to iterate over iteratees. 5271 * @returns {Function} Returns the new over function. 5272 */ 5273 function createOver(arrayFunc) { 5274 return flatRest(function(iteratees) { 5275 iteratees = arrayMap(iteratees, baseUnary(getIteratee())); 5276 return baseRest(function(args) { 5277 var thisArg = this; 5278 return arrayFunc(iteratees, function(iteratee) { 5279 return apply(iteratee, thisArg, args); 5280 }); 5281 }); 5282 }); 5283 } 5284 5285 /** 5286 * Creates the padding for `string` based on `length`. The `chars` string 5287 * is truncated if the number of characters exceeds `length`. 5288 * 5289 * @private 5290 * @param {number} length The padding length. 5291 * @param {string} [chars=' '] The string used as padding. 5292 * @returns {string} Returns the padding for `string`. 5293 */ 5294 function createPadding(length, chars) { 5295 chars = chars === undefined ? ' ' : baseToString(chars); 5296 5297 var charsLength = chars.length; 5298 if (charsLength < 2) { 5299 return charsLength ? baseRepeat(chars, length) : chars; 5300 } 5301 var result = baseRepeat(chars, nativeCeil(length / stringSize(chars))); 5302 return hasUnicode(chars) 5303 ? castSlice(stringToArray(result), 0, length).join('') 5304 : result.slice(0, length); 5305 } 5306 5307 /** 5308 * Creates a function that wraps `func` to invoke it with the `this` binding 5309 * of `thisArg` and `partials` prepended to the arguments it receives. 5310 * 5311 * @private 5312 * @param {Function} func The function to wrap. 5313 * @param {number} bitmask The bitmask flags. See `createWrap` for more details. 5314 * @param {*} thisArg The `this` binding of `func`. 5315 * @param {Array} partials The arguments to prepend to those provided to 5316 * the new function. 5317 * @returns {Function} Returns the new wrapped function. 5318 */ 5319 function createPartial(func, bitmask, thisArg, partials) { 5320 var isBind = bitmask & WRAP_BIND_FLAG, 5321 Ctor = createCtor(func); 5322 5323 function wrapper() { 5324 var argsIndex = -1, 5325 argsLength = arguments.length, 5326 leftIndex = -1, 5327 leftLength = partials.length, 5328 args = Array(leftLength + argsLength), 5329 fn = (this && this !== root && this instanceof wrapper) ? Ctor : func; 5330 5331 while (++leftIndex < leftLength) { 5332 args[leftIndex] = partials[leftIndex]; 5333 } 5334 while (argsLength--) { 5335 args[leftIndex++] = arguments[++argsIndex]; 5336 } 5337 return apply(fn, isBind ? thisArg : this, args); 5338 } 5339 return wrapper; 5340 } 5341 5342 /** 5343 * Creates a `_.range` or `_.rangeRight` function. 5344 * 5345 * @private 5346 * @param {boolean} [fromRight] Specify iterating from right to left. 5347 * @returns {Function} Returns the new range function. 5348 */ 5349 function createRange(fromRight) { 5350 return function(start, end, step) { 5351 if (step && typeof step != 'number' && isIterateeCall(start, end, step)) { 5352 end = step = undefined; 5353 } 5354 // Ensure the sign of `-0` is preserved. 5355 start = toFinite(start); 5356 if (end === undefined) { 5357 end = start; 5358 start = 0; 5359 } else { 5360 end = toFinite(end); 5361 } 5362 step = step === undefined ? (start < end ? 1 : -1) : toFinite(step); 5363 return baseRange(start, end, step, fromRight); 5364 }; 5365 } 5366 5367 /** 5368 * Creates a function that performs a relational operation on two values. 5369 * 5370 * @private 5371 * @param {Function} operator The function to perform the operation. 5372 * @returns {Function} Returns the new relational operation function. 5373 */ 5374 function createRelationalOperation(operator) { 5375 return function(value, other) { 5376 if (!(typeof value == 'string' && typeof other == 'string')) { 5377 value = toNumber(value); 5378 other = toNumber(other); 5379 } 5380 return operator(value, other); 5381 }; 5382 } 5383 5384 /** 5385 * Creates a function that wraps `func` to continue currying. 5386 * 5387 * @private 5388 * @param {Function} func The function to wrap. 5389 * @param {number} bitmask The bitmask flags. See `createWrap` for more details. 5390 * @param {Function} wrapFunc The function to create the `func` wrapper. 5391 * @param {*} placeholder The placeholder value. 5392 * @param {*} [thisArg] The `this` binding of `func`. 5393 * @param {Array} [partials] The arguments to prepend to those provided to 5394 * the new function. 5395 * @param {Array} [holders] The `partials` placeholder indexes. 5396 * @param {Array} [argPos] The argument positions of the new function. 5397 * @param {number} [ary] The arity cap of `func`. 5398 * @param {number} [arity] The arity of `func`. 5399 * @returns {Function} Returns the new wrapped function. 5400 */ 5401 function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) { 5402 var isCurry = bitmask & WRAP_CURRY_FLAG, 5403 newHolders = isCurry ? holders : undefined, 5404 newHoldersRight = isCurry ? undefined : holders, 5405 newPartials = isCurry ? partials : undefined, 5406 newPartialsRight = isCurry ? undefined : partials; 5407 5408 bitmask |= (isCurry ? WRAP_PARTIAL_FLAG : WRAP_PARTIAL_RIGHT_FLAG); 5409 bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG : WRAP_PARTIAL_FLAG); 5410 5411 if (!(bitmask & WRAP_CURRY_BOUND_FLAG)) { 5412 bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG); 5413 } 5414 var newData = [ 5415 func, bitmask, thisArg, newPartials, newHolders, newPartialsRight, 5416 newHoldersRight, argPos, ary, arity 5417 ]; 5418 5419 var result = wrapFunc.apply(undefined, newData); 5420 if (isLaziable(func)) { 5421 setData(result, newData); 5422 } 5423 result.placeholder = placeholder; 5424 return setWrapToString(result, func, bitmask); 5425 } 5426 5427 /** 5428 * Creates a function like `_.round`. 5429 * 5430 * @private 5431 * @param {string} methodName The name of the `Math` method to use when rounding. 5432 * @returns {Function} Returns the new round function. 5433 */ 5434 function createRound(methodName) { 5435 var func = Math[methodName]; 5436 return function(number, precision) { 5437 number = toNumber(number); 5438 precision = precision == null ? 0 : nativeMin(toInteger(precision), 292); 5439 if (precision && nativeIsFinite(number)) { 5440 // Shift with exponential notation to avoid floating-point issues. 5441 // See [MDN](https://mdn.io/round#Examples) for more details. 5442 var pair = (toString(number) + 'e').split('e'), 5443 value = func(pair[0] + 'e' + (+pair[1] + precision)); 5444 5445 pair = (toString(value) + 'e').split('e'); 5446 return +(pair[0] + 'e' + (+pair[1] - precision)); 5447 } 5448 return func(number); 5449 }; 5450 } 5451 5452 /** 5453 * Creates a set object of `values`. 5454 * 5455 * @private 5456 * @param {Array} values The values to add to the set. 5457 * @returns {Object} Returns the new set. 5458 */ 5459 var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) { 5460 return new Set(values); 5461 }; 5462 5463 /** 5464 * Creates a `_.toPairs` or `_.toPairsIn` function. 5465 * 5466 * @private 5467 * @param {Function} keysFunc The function to get the keys of a given object. 5468 * @returns {Function} Returns the new pairs function. 5469 */ 5470 function createToPairs(keysFunc) { 5471 return function(object) { 5472 var tag = getTag(object); 5473 if (tag == mapTag) { 5474 return mapToArray(object); 5475 } 5476 if (tag == setTag) { 5477 return setToPairs(object); 5478 } 5479 return baseToPairs(object, keysFunc(object)); 5480 }; 5481 } 5482 5483 /** 5484 * Creates a function that either curries or invokes `func` with optional 5485 * `this` binding and partially applied arguments. 5486 * 5487 * @private 5488 * @param {Function|string} func The function or method name to wrap. 5489 * @param {number} bitmask The bitmask flags. 5490 * 1 - `_.bind` 5491 * 2 - `_.bindKey` 5492 * 4 - `_.curry` or `_.curryRight` of a bound function 5493 * 8 - `_.curry` 5494 * 16 - `_.curryRight` 5495 * 32 - `_.partial` 5496 * 64 - `_.partialRight` 5497 * 128 - `_.rearg` 5498 * 256 - `_.ary` 5499 * 512 - `_.flip` 5500 * @param {*} [thisArg] The `this` binding of `func`. 5501 * @param {Array} [partials] The arguments to be partially applied. 5502 * @param {Array} [holders] The `partials` placeholder indexes. 5503 * @param {Array} [argPos] The argument positions of the new function. 5504 * @param {number} [ary] The arity cap of `func`. 5505 * @param {number} [arity] The arity of `func`. 5506 * @returns {Function} Returns the new wrapped function. 5507 */ 5508 function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) { 5509 var isBindKey = bitmask & WRAP_BIND_KEY_FLAG; 5510 if (!isBindKey && typeof func != 'function') { 5511 throw new TypeError(FUNC_ERROR_TEXT); 5512 } 5513 var length = partials ? partials.length : 0; 5514 if (!length) { 5515 bitmask &= ~(WRAP_PARTIAL_FLAG | WRAP_PARTIAL_RIGHT_FLAG); 5516 partials = holders = undefined; 5517 } 5518 ary = ary === undefined ? ary : nativeMax(toInteger(ary), 0); 5519 arity = arity === undefined ? arity : toInteger(arity); 5520 length -= holders ? holders.length : 0; 5521 5522 if (bitmask & WRAP_PARTIAL_RIGHT_FLAG) { 5523 var partialsRight = partials, 5524 holdersRight = holders; 5525 5526 partials = holders = undefined; 5527 } 5528 var data = isBindKey ? undefined : getData(func); 5529 5530 var newData = [ 5531 func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, 5532 argPos, ary, arity 5533 ]; 5534 5535 if (data) { 5536 mergeData(newData, data); 5537 } 5538 func = newData[0]; 5539 bitmask = newData[1]; 5540 thisArg = newData[2]; 5541 partials = newData[3]; 5542 holders = newData[4]; 5543 arity = newData[9] = newData[9] === undefined 5544 ? (isBindKey ? 0 : func.length) 5545 : nativeMax(newData[9] - length, 0); 5546 5547 if (!arity && bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG)) { 5548 bitmask &= ~(WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG); 5549 } 5550 if (!bitmask || bitmask == WRAP_BIND_FLAG) { 5551 var result = createBind(func, bitmask, thisArg); 5552 } else if (bitmask == WRAP_CURRY_FLAG || bitmask == WRAP_CURRY_RIGHT_FLAG) { 5553 result = createCurry(func, bitmask, arity); 5554 } else if ((bitmask == WRAP_PARTIAL_FLAG || bitmask == (WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG)) && !holders.length) { 5555 result = createPartial(func, bitmask, thisArg, partials); 5556 } else { 5557 result = createHybrid.apply(undefined, newData); 5558 } 5559 var setter = data ? baseSetData : setData; 5560 return setWrapToString(setter(result, newData), func, bitmask); 5561 } 5562 5563 /** 5564 * Used by `_.defaults` to customize its `_.assignIn` use to assign properties 5565 * of source objects to the destination object for all destination properties 5566 * that resolve to `undefined`. 5567 * 5568 * @private 5569 * @param {*} objValue The destination value. 5570 * @param {*} srcValue The source value. 5571 * @param {string} key The key of the property to assign. 5572 * @param {Object} object The parent object of `objValue`. 5573 * @returns {*} Returns the value to assign. 5574 */ 5575 function customDefaultsAssignIn(objValue, srcValue, key, object) { 5576 if (objValue === undefined || 5577 (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) { 5578 return srcValue; 5579 } 5580 return objValue; 5581 } 5582 5583 /** 5584 * Used by `_.defaultsDeep` to customize its `_.merge` use to merge source 5585 * objects into destination objects that are passed thru. 5586 * 5587 * @private 5588 * @param {*} objValue The destination value. 5589 * @param {*} srcValue The source value. 5590 * @param {string} key The key of the property to merge. 5591 * @param {Object} object The parent object of `objValue`. 5592 * @param {Object} source The parent object of `srcValue`. 5593 * @param {Object} [stack] Tracks traversed source values and their merged 5594 * counterparts. 5595 * @returns {*} Returns the value to assign. 5596 */ 5597 function customDefaultsMerge(objValue, srcValue, key, object, source, stack) { 5598 if (isObject(objValue) && isObject(srcValue)) { 5599 // Recursively merge objects and arrays (susceptible to call stack limits). 5600 stack.set(srcValue, objValue); 5601 baseMerge(objValue, srcValue, undefined, customDefaultsMerge, stack); 5602 stack['delete'](srcValue); 5603 } 5604 return objValue; 5605 } 5606 5607 /** 5608 * Used by `_.omit` to customize its `_.cloneDeep` use to only clone plain 5609 * objects. 5610 * 5611 * @private 5612 * @param {*} value The value to inspect. 5613 * @param {string} key The key of the property to inspect. 5614 * @returns {*} Returns the uncloned value or `undefined` to defer cloning to `_.cloneDeep`. 5615 */ 5616 function customOmitClone(value) { 5617 return isPlainObject(value) ? undefined : value; 5618 } 5619 5620 /** 5621 * A specialized version of `baseIsEqualDeep` for arrays with support for 5622 * partial deep comparisons. 5623 * 5624 * @private 5625 * @param {Array} array The array to compare. 5626 * @param {Array} other The other array to compare. 5627 * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details. 5628 * @param {Function} customizer The function to customize comparisons. 5629 * @param {Function} equalFunc The function to determine equivalents of values. 5630 * @param {Object} stack Tracks traversed `array` and `other` objects. 5631 * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`. 5632 */ 5633 function equalArrays(array, other, bitmask, customizer, equalFunc, stack) { 5634 var isPartial = bitmask & COMPARE_PARTIAL_FLAG, 5635 arrLength = array.length, 5636 othLength = other.length; 5637 5638 if (arrLength != othLength && !(isPartial && othLength > arrLength)) { 5639 return false; 5640 } 5641 // Check that cyclic values are equal. 5642 var arrStacked = stack.get(array); 5643 var othStacked = stack.get(other); 5644 if (arrStacked && othStacked) { 5645 return arrStacked == other && othStacked == array; 5646 } 5647 var index = -1, 5648 result = true, 5649 seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined; 5650 5651 stack.set(array, other); 5652 stack.set(other, array); 5653 5654 // Ignore non-index properties. 5655 while (++index < arrLength) { 5656 var arrValue = array[index], 5657 othValue = other[index]; 5658 5659 if (customizer) { 5660 var compared = isPartial 5661 ? customizer(othValue, arrValue, index, other, array, stack) 5662 : customizer(arrValue, othValue, index, array, other, stack); 5663 } 5664 if (compared !== undefined) { 5665 if (compared) { 5666 continue; 5667 } 5668 result = false; 5669 break; 5670 } 5671 // Recursively compare arrays (susceptible to call stack limits). 5672 if (seen) { 5673 if (!arraySome(other, function(othValue, othIndex) { 5674 if (!cacheHas(seen, othIndex) && 5675 (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) { 5676 return seen.push(othIndex); 5677 } 5678 })) { 5679 result = false; 5680 break; 5681 } 5682 } else if (!( 5683 arrValue === othValue || 5684 equalFunc(arrValue, othValue, bitmask, customizer, stack) 5685 )) { 5686 result = false; 5687 break; 5688 } 5689 } 5690 stack['delete'](array); 5691 stack['delete'](other); 5692 return result; 5693 } 5694 5695 /** 5696 * A specialized version of `baseIsEqualDeep` for comparing objects of 5697 * the same `toStringTag`. 5698 * 5699 * **Note:** This function only supports comparing values with tags of 5700 * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`. 5701 * 5702 * @private 5703 * @param {Object} object The object to compare. 5704 * @param {Object} other The other object to compare. 5705 * @param {string} tag The `toStringTag` of the objects to compare. 5706 * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details. 5707 * @param {Function} customizer The function to customize comparisons. 5708 * @param {Function} equalFunc The function to determine equivalents of values. 5709 * @param {Object} stack Tracks traversed `object` and `other` objects. 5710 * @returns {boolean} Returns `true` if the objects are equivalent, else `false`. 5711 */ 5712 function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) { 5713 switch (tag) { 5714 case dataViewTag: 5715 if ((object.byteLength != other.byteLength) || 5716 (object.byteOffset != other.byteOffset)) { 5717 return false; 5718 } 5719 object = object.buffer; 5720 other = other.buffer; 5721 5722 case arrayBufferTag: 5723 if ((object.byteLength != other.byteLength) || 5724 !equalFunc(new Uint8Array(object), new Uint8Array(other))) { 5725 return false; 5726 } 5727 return true; 5728 5729 case boolTag: 5730 case dateTag: 5731 case numberTag: 5732 // Coerce booleans to `1` or `0` and dates to milliseconds. 5733 // Invalid dates are coerced to `NaN`. 5734 return eq(+object, +other); 5735 5736 case errorTag: 5737 return object.name == other.name && object.message == other.message; 5738 5739 case regexpTag: 5740 case stringTag: 5741 // Coerce regexes to strings and treat strings, primitives and objects, 5742 // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring 5743 // for more details. 5744 return object == (other + ''); 5745 5746 case mapTag: 5747 var convert = mapToArray; 5748 5749 case setTag: 5750 var isPartial = bitmask & COMPARE_PARTIAL_FLAG; 5751 convert || (convert = setToArray); 5752 5753 if (object.size != other.size && !isPartial) { 5754 return false; 5755 } 5756 // Assume cyclic values are equal. 5757 var stacked = stack.get(object); 5758 if (stacked) { 5759 return stacked == other; 5760 } 5761 bitmask |= COMPARE_UNORDERED_FLAG; 5762 5763 // Recursively compare objects (susceptible to call stack limits). 5764 stack.set(object, other); 5765 var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack); 5766 stack['delete'](object); 5767 return result; 5768 5769 case symbolTag: 5770 if (symbolValueOf) { 5771 return symbolValueOf.call(object) == symbolValueOf.call(other); 5772 } 5773 } 5774 return false; 5775 } 5776 5777 /** 5778 * A specialized version of `baseIsEqualDeep` for objects with support for 5779 * partial deep comparisons. 5780 * 5781 * @private 5782 * @param {Object} object The object to compare. 5783 * @param {Object} other The other object to compare. 5784 * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details. 5785 * @param {Function} customizer The function to customize comparisons. 5786 * @param {Function} equalFunc The function to determine equivalents of values. 5787 * @param {Object} stack Tracks traversed `object` and `other` objects. 5788 * @returns {boolean} Returns `true` if the objects are equivalent, else `false`. 5789 */ 5790 function equalObjects(object, other, bitmask, customizer, equalFunc, stack) { 5791 var isPartial = bitmask & COMPARE_PARTIAL_FLAG, 5792 objProps = getAllKeys(object), 5793 objLength = objProps.length, 5794 othProps = getAllKeys(other), 5795 othLength = othProps.length; 5796 5797 if (objLength != othLength && !isPartial) { 5798 return false; 5799 } 5800 var index = objLength; 5801 while (index--) { 5802 var key = objProps[index]; 5803 if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) { 5804 return false; 5805 } 5806 } 5807 // Check that cyclic values are equal. 5808 var objStacked = stack.get(object); 5809 var othStacked = stack.get(other); 5810 if (objStacked && othStacked) { 5811 return objStacked == other && othStacked == object; 5812 } 5813 var result = true; 5814 stack.set(object, other); 5815 stack.set(other, object); 5816 5817 var skipCtor = isPartial; 5818 while (++index < objLength) { 5819 key = objProps[index]; 5820 var objValue = object[key], 5821 othValue = other[key]; 5822 5823 if (customizer) { 5824 var compared = isPartial 5825 ? customizer(othValue, objValue, key, other, object, stack) 5826 : customizer(objValue, othValue, key, object, other, stack); 5827 } 5828 // Recursively compare objects (susceptible to call stack limits). 5829 if (!(compared === undefined 5830 ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack)) 5831 : compared 5832 )) { 5833 result = false; 5834 break; 5835 } 5836 skipCtor || (skipCtor = key == 'constructor'); 5837 } 5838 if (result && !skipCtor) { 5839 var objCtor = object.constructor, 5840 othCtor = other.constructor; 5841 5842 // Non `Object` object instances with different constructors are not equal. 5843 if (objCtor != othCtor && 5844 ('constructor' in object && 'constructor' in other) && 5845 !(typeof objCtor == 'function' && objCtor instanceof objCtor && 5846 typeof othCtor == 'function' && othCtor instanceof othCtor)) { 5847 result = false; 5848 } 5849 } 5850 stack['delete'](object); 5851 stack['delete'](other); 5852 return result; 5853 } 5854 5855 /** 5856 * A specialized version of `baseRest` which flattens the rest array. 5857 * 5858 * @private 5859 * @param {Function} func The function to apply a rest parameter to. 5860 * @returns {Function} Returns the new function. 5861 */ 5862 function flatRest(func) { 5863 return setToString(overRest(func, undefined, flatten), func + ''); 5864 } 5865 5866 /** 5867 * Creates an array of own enumerable property names and symbols of `object`. 5868 * 5869 * @private 5870 * @param {Object} object The object to query. 5871 * @returns {Array} Returns the array of property names and symbols. 5872 */ 5873 function getAllKeys(object) { 5874 return baseGetAllKeys(object, keys, getSymbols); 5875 } 5876 5877 /** 5878 * Creates an array of own and inherited enumerable property names and 5879 * symbols of `object`. 5880 * 5881 * @private 5882 * @param {Object} object The object to query. 5883 * @returns {Array} Returns the array of property names and symbols. 5884 */ 5885 function getAllKeysIn(object) { 5886 return baseGetAllKeys(object, keysIn, getSymbolsIn); 5887 } 5888 5889 /** 5890 * Gets metadata for `func`. 5891 * 5892 * @private 5893 * @param {Function} func The function to query. 5894 * @returns {*} Returns the metadata for `func`. 5895 */ 5896 var getData = !metaMap ? noop : function(func) { 5897 return metaMap.get(func); 5898 }; 5899 5900 /** 5901 * Gets the name of `func`. 5902 * 5903 * @private 5904 * @param {Function} func The function to query. 5905 * @returns {string} Returns the function name. 5906 */ 5907 function getFuncName(func) { 5908 var result = (func.name + ''), 5909 array = realNames[result], 5910 length = hasOwnProperty.call(realNames, result) ? array.length : 0; 5911 5912 while (length--) { 5913 var data = array[length], 5914 otherFunc = data.func; 5915 if (otherFunc == null || otherFunc == func) { 5916 return data.name; 5917 } 5918 } 5919 return result; 5920 } 5921 5922 /** 5923 * Gets the argument placeholder value for `func`. 5924 * 5925 * @private 5926 * @param {Function} func The function to inspect. 5927 * @returns {*} Returns the placeholder value. 5928 */ 5929 function getHolder(func) { 5930 var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func; 5931 return object.placeholder; 5932 } 5933 5934 /** 5935 * Gets the appropriate "iteratee" function. If `_.iteratee` is customized, 5936 * this function returns the custom method, otherwise it returns `baseIteratee`. 5937 * If arguments are provided, the chosen function is invoked with them and 5938 * its result is returned. 5939 * 5940 * @private 5941 * @param {*} [value] The value to convert to an iteratee. 5942 * @param {number} [arity] The arity of the created iteratee. 5943 * @returns {Function} Returns the chosen function or its result. 5944 */ 5945 function getIteratee() { 5946 var result = lodash.iteratee || iteratee; 5947 result = result === iteratee ? baseIteratee : result; 5948 return arguments.length ? result(arguments[0], arguments[1]) : result; 5949 } 5950 5951 /** 5952 * Gets the data for `map`. 5953 * 5954 * @private 5955 * @param {Object} map The map to query. 5956 * @param {string} key The reference key. 5957 * @returns {*} Returns the map data. 5958 */ 5959 function getMapData(map, key) { 5960 var data = map.__data__; 5961 return isKeyable(key) 5962 ? data[typeof key == 'string' ? 'string' : 'hash'] 5963 : data.map; 5964 } 5965 5966 /** 5967 * Gets the property names, values, and compare flags of `object`. 5968 * 5969 * @private 5970 * @param {Object} object The object to query. 5971 * @returns {Array} Returns the match data of `object`. 5972 */ 5973 function getMatchData(object) { 5974 var result = keys(object), 5975 length = result.length; 5976 5977 while (length--) { 5978 var key = result[length], 5979 value = object[key]; 5980 5981 result[length] = [key, value, isStrictComparable(value)]; 5982 } 5983 return result; 5984 } 5985 5986 /** 5987 * Gets the native function at `key` of `object`. 5988 * 5989 * @private 5990 * @param {Object} object The object to query. 5991 * @param {string} key The key of the method to get. 5992 * @returns {*} Returns the function if it's native, else `undefined`. 5993 */ 5994 function getNative(object, key) { 5995 var value = getValue(object, key); 5996 return baseIsNative(value) ? value : undefined; 5997 } 5998 5999 /** 6000 * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values. 6001 * 6002 * @private 6003 * @param {*} value The value to query. 6004 * @returns {string} Returns the raw `toStringTag`. 6005 */ 6006 function getRawTag(value) { 6007 var isOwn = hasOwnProperty.call(value, symToStringTag), 6008 tag = value[symToStringTag]; 6009 6010 try { 6011 value[symToStringTag] = undefined; 6012 var unmasked = true; 6013 } catch (e) {} 6014 6015 var result = nativeObjectToString.call(value); 6016 if (unmasked) { 6017 if (isOwn) { 6018 value[symToStringTag] = tag; 6019 } else { 6020 delete value[symToStringTag]; 6021 } 6022 } 6023 return result; 6024 } 6025 6026 /** 6027 * Creates an array of the own enumerable symbols of `object`. 6028 * 6029 * @private 6030 * @param {Object} object The object to query. 6031 * @returns {Array} Returns the array of symbols. 6032 */ 6033 var getSymbols = !nativeGetSymbols ? stubArray : function(object) { 6034 if (object == null) { 6035 return []; 6036 } 6037 object = Object(object); 6038 return arrayFilter(nativeGetSymbols(object), function(symbol) { 6039 return propertyIsEnumerable.call(object, symbol); 6040 }); 6041 }; 6042 6043 /** 6044 * Creates an array of the own and inherited enumerable symbols of `object`. 6045 * 6046 * @private 6047 * @param {Object} object The object to query. 6048 * @returns {Array} Returns the array of symbols. 6049 */ 6050 var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) { 6051 var result = []; 6052 while (object) { 6053 arrayPush(result, getSymbols(object)); 6054 object = getPrototype(object); 6055 } 6056 return result; 6057 }; 6058 6059 /** 6060 * Gets the `toStringTag` of `value`. 6061 * 6062 * @private 6063 * @param {*} value The value to query. 6064 * @returns {string} Returns the `toStringTag`. 6065 */ 6066 var getTag = baseGetTag; 6067 6068 // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6. 6069 if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) || 6070 (Map && getTag(new Map) != mapTag) || 6071 (Promise && getTag(Promise.resolve()) != promiseTag) || 6072 (Set && getTag(new Set) != setTag) || 6073 (WeakMap && getTag(new WeakMap) != weakMapTag)) { 6074 getTag = function(value) { 6075 var result = baseGetTag(value), 6076 Ctor = result == objectTag ? value.constructor : undefined, 6077 ctorString = Ctor ? toSource(Ctor) : ''; 6078 6079 if (ctorString) { 6080 switch (ctorString) { 6081 case dataViewCtorString: return dataViewTag; 6082 case mapCtorString: return mapTag; 6083 case promiseCtorString: return promiseTag; 6084 case setCtorString: return setTag; 6085 case weakMapCtorString: return weakMapTag; 6086 } 6087 } 6088 return result; 6089 }; 6090 } 6091 6092 /** 6093 * Gets the view, applying any `transforms` to the `start` and `end` positions. 6094 * 6095 * @private 6096 * @param {number} start The start of the view. 6097 * @param {number} end The end of the view. 6098 * @param {Array} transforms The transformations to apply to the view. 6099 * @returns {Object} Returns an object containing the `start` and `end` 6100 * positions of the view. 6101 */ 6102 function getView(start, end, transforms) { 6103 var index = -1, 6104 length = transforms.length; 6105 6106 while (++index < length) { 6107 var data = transforms[index], 6108 size = data.size; 6109 6110 switch (data.type) { 6111 case 'drop': start += size; break; 6112 case 'dropRight': end -= size; break; 6113 case 'take': end = nativeMin(end, start + size); break; 6114 case 'takeRight': start = nativeMax(start, end - size); break; 6115 } 6116 } 6117 return { 'start': start, 'end': end }; 6118 } 6119 6120 /** 6121 * Extracts wrapper details from the `source` body comment. 6122 * 6123 * @private 6124 * @param {string} source The source to inspect. 6125 * @returns {Array} Returns the wrapper details. 6126 */ 6127 function getWrapDetails(source) { 6128 var match = source.match(reWrapDetails); 6129 return match ? match[1].split(reSplitDetails) : []; 6130 } 6131 6132 /** 6133 * Checks if `path` exists on `object`. 6134 * 6135 * @private 6136 * @param {Object} object The object to query. 6137 * @param {Array|string} path The path to check. 6138 * @param {Function} hasFunc The function to check properties. 6139 * @returns {boolean} Returns `true` if `path` exists, else `false`. 6140 */ 6141 function hasPath(object, path, hasFunc) { 6142 path = castPath(path, object); 6143 6144 var index = -1, 6145 length = path.length, 6146 result = false; 6147 6148 while (++index < length) { 6149 var key = toKey(path[index]); 6150 if (!(result = object != null && hasFunc(object, key))) { 6151 break; 6152 } 6153 object = object[key]; 6154 } 6155 if (result || ++index != length) { 6156 return result; 6157 } 6158 length = object == null ? 0 : object.length; 6159 return !!length && isLength(length) && isIndex(key, length) && 6160 (isArray(object) || isArguments(object)); 6161 } 6162 6163 /** 6164 * Initializes an array clone. 6165 * 6166 * @private 6167 * @param {Array} array The array to clone. 6168 * @returns {Array} Returns the initialized clone. 6169 */ 6170 function initCloneArray(array) { 6171 var length = array.length, 6172 result = new array.constructor(length); 6173 6174 // Add properties assigned by `RegExp#exec`. 6175 if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) { 6176 result.index = array.index; 6177 result.input = array.input; 6178 } 6179 return result; 6180 } 6181 6182 /** 6183 * Initializes an object clone. 6184 * 6185 * @private 6186 * @param {Object} object The object to clone. 6187 * @returns {Object} Returns the initialized clone. 6188 */ 6189 function initCloneObject(object) { 6190 return (typeof object.constructor == 'function' && !isPrototype(object)) 6191 ? baseCreate(getPrototype(object)) 6192 : {}; 6193 } 6194 6195 /** 6196 * Initializes an object clone based on its `toStringTag`. 6197 * 6198 * **Note:** This function only supports cloning values with tags of 6199 * `Boolean`, `Date`, `Error`, `Map`, `Number`, `RegExp`, `Set`, or `String`. 6200 * 6201 * @private 6202 * @param {Object} object The object to clone. 6203 * @param {string} tag The `toStringTag` of the object to clone. 6204 * @param {boolean} [isDeep] Specify a deep clone. 6205 * @returns {Object} Returns the initialized clone. 6206 */ 6207 function initCloneByTag(object, tag, isDeep) { 6208 var Ctor = object.constructor; 6209 switch (tag) { 6210 case arrayBufferTag: 6211 return cloneArrayBuffer(object); 6212 6213 case boolTag: 6214 case dateTag: 6215 return new Ctor(+object); 6216 6217 case dataViewTag: 6218 return cloneDataView(object, isDeep); 6219 6220 case float32Tag: case float64Tag: 6221 case int8Tag: case int16Tag: case int32Tag: 6222 case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag: 6223 return cloneTypedArray(object, isDeep); 6224 6225 case mapTag: 6226 return new Ctor; 6227 6228 case numberTag: 6229 case stringTag: 6230 return new Ctor(object); 6231 6232 case regexpTag: 6233 return cloneRegExp(object); 6234 6235 case setTag: 6236 return new Ctor; 6237 6238 case symbolTag: 6239 return cloneSymbol(object); 6240 } 6241 } 6242 6243 /** 6244 * Inserts wrapper `details` in a comment at the top of the `source` body. 6245 * 6246 * @private 6247 * @param {string} source The source to modify. 6248 * @returns {Array} details The details to insert. 6249 * @returns {string} Returns the modified source. 6250 */ 6251 function insertWrapDetails(source, details) { 6252 var length = details.length; 6253 if (!length) { 6254 return source; 6255 } 6256 var lastIndex = length - 1; 6257 details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex]; 6258 details = details.join(length > 2 ? ', ' : ' '); 6259 return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n'); 6260 } 6261 6262 /** 6263 * Checks if `value` is a flattenable `arguments` object or array. 6264 * 6265 * @private 6266 * @param {*} value The value to check. 6267 * @returns {boolean} Returns `true` if `value` is flattenable, else `false`. 6268 */ 6269 function isFlattenable(value) { 6270 return isArray(value) || isArguments(value) || 6271 !!(spreadableSymbol && value && value[spreadableSymbol]); 6272 } 6273 6274 /** 6275 * Checks if `value` is a valid array-like index. 6276 * 6277 * @private 6278 * @param {*} value The value to check. 6279 * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index. 6280 * @returns {boolean} Returns `true` if `value` is a valid index, else `false`. 6281 */ 6282 function isIndex(value, length) { 6283 var type = typeof value; 6284 length = length == null ? MAX_SAFE_INTEGER : length; 6285 6286 return !!length && 6287 (type == 'number' || 6288 (type != 'symbol' && reIsUint.test(value))) && 6289 (value > -1 && value % 1 == 0 && value < length); 6290 } 6291 6292 /** 6293 * Checks if the given arguments are from an iteratee call. 6294 * 6295 * @private 6296 * @param {*} value The potential iteratee value argument. 6297 * @param {*} index The potential iteratee index or key argument. 6298 * @param {*} object The potential iteratee object argument. 6299 * @returns {boolean} Returns `true` if the arguments are from an iteratee call, 6300 * else `false`. 6301 */ 6302 function isIterateeCall(value, index, object) { 6303 if (!isObject(object)) { 6304 return false; 6305 } 6306 var type = typeof index; 6307 if (type == 'number' 6308 ? (isArrayLike(object) && isIndex(index, object.length)) 6309 : (type == 'string' && index in object) 6310 ) { 6311 return eq(object[index], value); 6312 } 6313 return false; 6314 } 6315 6316 /** 6317 * Checks if `value` is a property name and not a property path. 6318 * 6319 * @private 6320 * @param {*} value The value to check. 6321 * @param {Object} [object] The object to query keys on. 6322 * @returns {boolean} Returns `true` if `value` is a property name, else `false`. 6323 */ 6324 function isKey(value, object) { 6325 if (isArray(value)) { 6326 return false; 6327 } 6328 var type = typeof value; 6329 if (type == 'number' || type == 'symbol' || type == 'boolean' || 6330 value == null || isSymbol(value)) { 6331 return true; 6332 } 6333 return reIsPlainProp.test(value) || !reIsDeepProp.test(value) || 6334 (object != null && value in Object(object)); 6335 } 6336 6337 /** 6338 * Checks if `value` is suitable for use as unique object key. 6339 * 6340 * @private 6341 * @param {*} value The value to check. 6342 * @returns {boolean} Returns `true` if `value` is suitable, else `false`. 6343 */ 6344 function isKeyable(value) { 6345 var type = typeof value; 6346 return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean') 6347 ? (value !== '__proto__') 6348 : (value === null); 6349 } 6350 6351 /** 6352 * Checks if `func` has a lazy counterpart. 6353 * 6354 * @private 6355 * @param {Function} func The function to check. 6356 * @returns {boolean} Returns `true` if `func` has a lazy counterpart, 6357 * else `false`. 6358 */ 6359 function isLaziable(func) { 6360 var funcName = getFuncName(func), 6361 other = lodash[funcName]; 6362 6363 if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) { 6364 return false; 6365 } 6366 if (func === other) { 6367 return true; 6368 } 6369 var data = getData(other); 6370 return !!data && func === data[0]; 6371 } 6372 6373 /** 6374 * Checks if `func` has its source masked. 6375 * 6376 * @private 6377 * @param {Function} func The function to check. 6378 * @returns {boolean} Returns `true` if `func` is masked, else `false`. 6379 */ 6380 function isMasked(func) { 6381 return !!maskSrcKey && (maskSrcKey in func); 6382 } 6383 6384 /** 6385 * Checks if `func` is capable of being masked. 6386 * 6387 * @private 6388 * @param {*} value The value to check. 6389 * @returns {boolean} Returns `true` if `func` is maskable, else `false`. 6390 */ 6391 var isMaskable = coreJsData ? isFunction : stubFalse; 6392 6393 /** 6394 * Checks if `value` is likely a prototype object. 6395 * 6396 * @private 6397 * @param {*} value The value to check. 6398 * @returns {boolean} Returns `true` if `value` is a prototype, else `false`. 6399 */ 6400 function isPrototype(value) { 6401 var Ctor = value && value.constructor, 6402 proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto; 6403 6404 return value === proto; 6405 } 6406 6407 /** 6408 * Checks if `value` is suitable for strict equality comparisons, i.e. `===`. 6409 * 6410 * @private 6411 * @param {*} value The value to check. 6412 * @returns {boolean} Returns `true` if `value` if suitable for strict 6413 * equality comparisons, else `false`. 6414 */ 6415 function isStrictComparable(value) { 6416 return value === value && !isObject(value); 6417 } 6418 6419 /** 6420 * A specialized version of `matchesProperty` for source values suitable 6421 * for strict equality comparisons, i.e. `===`. 6422 * 6423 * @private 6424 * @param {string} key The key of the property to get. 6425 * @param {*} srcValue The value to match. 6426 * @returns {Function} Returns the new spec function. 6427 */ 6428 function matchesStrictComparable(key, srcValue) { 6429 return function(object) { 6430 if (object == null) { 6431 return false; 6432 } 6433 return object[key] === srcValue && 6434 (srcValue !== undefined || (key in Object(object))); 6435 }; 6436 } 6437 6438 /** 6439 * A specialized version of `_.memoize` which clears the memoized function's 6440 * cache when it exceeds `MAX_MEMOIZE_SIZE`. 6441 * 6442 * @private 6443 * @param {Function} func The function to have its output memoized. 6444 * @returns {Function} Returns the new memoized function. 6445 */ 6446 function memoizeCapped(func) { 6447 var result = memoize(func, function(key) { 6448 if (cache.size === MAX_MEMOIZE_SIZE) { 6449 cache.clear(); 6450 } 6451 return key; 6452 }); 6453 6454 var cache = result.cache; 6455 return result; 6456 } 6457 6458 /** 6459 * Merges the function metadata of `source` into `data`. 6460 * 6461 * Merging metadata reduces the number of wrappers used to invoke a function. 6462 * This is possible because methods like `_.bind`, `_.curry`, and `_.partial` 6463 * may be applied regardless of execution order. Methods like `_.ary` and 6464 * `_.rearg` modify function arguments, making the order in which they are 6465 * executed important, preventing the merging of metadata. However, we make 6466 * an exception for a safe combined case where curried functions have `_.ary` 6467 * and or `_.rearg` applied. 6468 * 6469 * @private 6470 * @param {Array} data The destination metadata. 6471 * @param {Array} source The source metadata. 6472 * @returns {Array} Returns `data`. 6473 */ 6474 function mergeData(data, source) { 6475 var bitmask = data[1], 6476 srcBitmask = source[1], 6477 newBitmask = bitmask | srcBitmask, 6478 isCommon = newBitmask < (WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG | WRAP_ARY_FLAG); 6479 6480 var isCombo = 6481 ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_CURRY_FLAG)) || 6482 ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_REARG_FLAG) && (data[7].length <= source[8])) || 6483 ((srcBitmask == (WRAP_ARY_FLAG | WRAP_REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == WRAP_CURRY_FLAG)); 6484 6485 // Exit early if metadata can't be merged. 6486 if (!(isCommon || isCombo)) { 6487 return data; 6488 } 6489 // Use source `thisArg` if available. 6490 if (srcBitmask & WRAP_BIND_FLAG) { 6491 data[2] = source[2]; 6492 // Set when currying a bound function. 6493 newBitmask |= bitmask & WRAP_BIND_FLAG ? 0 : WRAP_CURRY_BOUND_FLAG; 6494 } 6495 // Compose partial arguments. 6496 var value = source[3]; 6497 if (value) { 6498 var partials = data[3]; 6499 data[3] = partials ? composeArgs(partials, value, source[4]) : value; 6500 data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4]; 6501 } 6502 // Compose partial right arguments. 6503 value = source[5]; 6504 if (value) { 6505 partials = data[5]; 6506 data[5] = partials ? composeArgsRight(partials, value, source[6]) : value; 6507 data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6]; 6508 } 6509 // Use source `argPos` if available. 6510 value = source[7]; 6511 if (value) { 6512 data[7] = value; 6513 } 6514 // Use source `ary` if it's smaller. 6515 if (srcBitmask & WRAP_ARY_FLAG) { 6516 data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]); 6517 } 6518 // Use source `arity` if one is not provided. 6519 if (data[9] == null) { 6520 data[9] = source[9]; 6521 } 6522 // Use source `func` and merge bitmasks. 6523 data[0] = source[0]; 6524 data[1] = newBitmask; 6525 6526 return data; 6527 } 6528 6529 /** 6530 * This function is like 6531 * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys) 6532 * except that it includes inherited enumerable properties. 6533 * 6534 * @private 6535 * @param {Object} object The object to query. 6536 * @returns {Array} Returns the array of property names. 6537 */ 6538 function nativeKeysIn(object) { 6539 var result = []; 6540 if (object != null) { 6541 for (var key in Object(object)) { 6542 result.push(key); 6543 } 6544 } 6545 return result; 6546 } 6547 6548 /** 6549 * Converts `value` to a string using `Object.prototype.toString`. 6550 * 6551 * @private 6552 * @param {*} value The value to convert. 6553 * @returns {string} Returns the converted string. 6554 */ 6555 function objectToString(value) { 6556 return nativeObjectToString.call(value); 6557 } 6558 6559 /** 6560 * A specialized version of `baseRest` which transforms the rest array. 6561 * 6562 * @private 6563 * @param {Function} func The function to apply a rest parameter to. 6564 * @param {number} [start=func.length-1] The start position of the rest parameter. 6565 * @param {Function} transform The rest array transform. 6566 * @returns {Function} Returns the new function. 6567 */ 6568 function overRest(func, start, transform) { 6569 start = nativeMax(start === undefined ? (func.length - 1) : start, 0); 6570 return function() { 6571 var args = arguments, 6572 index = -1, 6573 length = nativeMax(args.length - start, 0), 6574 array = Array(length); 6575 6576 while (++index < length) { 6577 array[index] = args[start + index]; 6578 } 6579 index = -1; 6580 var otherArgs = Array(start + 1); 6581 while (++index < start) { 6582 otherArgs[index] = args[index]; 6583 } 6584 otherArgs[start] = transform(array); 6585 return apply(func, this, otherArgs); 6586 }; 6587 } 6588 6589 /** 6590 * Gets the parent value at `path` of `object`. 6591 * 6592 * @private 6593 * @param {Object} object The object to query. 6594 * @param {Array} path The path to get the parent value of. 6595 * @returns {*} Returns the parent value. 6596 */ 6597 function parent(object, path) { 6598 return path.length < 2 ? object : baseGet(object, baseSlice(path, 0, -1)); 6599 } 6600 6601 /** 6602 * Reorder `array` according to the specified indexes where the element at 6603 * the first index is assigned as the first element, the element at 6604 * the second index is assigned as the second element, and so on. 6605 * 6606 * @private 6607 * @param {Array} array The array to reorder. 6608 * @param {Array} indexes The arranged array indexes. 6609 * @returns {Array} Returns `array`. 6610 */ 6611 function reorder(array, indexes) { 6612 var arrLength = array.length, 6613 length = nativeMin(indexes.length, arrLength), 6614 oldArray = copyArray(array); 6615 6616 while (length--) { 6617 var index = indexes[length]; 6618 array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined; 6619 } 6620 return array; 6621 } 6622 6623 /** 6624 * Gets the value at `key`, unless `key` is "__proto__" or "constructor". 6625 * 6626 * @private 6627 * @param {Object} object The object to query. 6628 * @param {string} key The key of the property to get. 6629 * @returns {*} Returns the property value. 6630 */ 6631 function safeGet(object, key) { 6632 if (key === 'constructor' && typeof object[key] === 'function') { 6633 return; 6634 } 6635 6636 if (key == '__proto__') { 6637 return; 6638 } 6639 6640 return object[key]; 6641 } 6642 6643 /** 6644 * Sets metadata for `func`. 6645 * 6646 * **Note:** If this function becomes hot, i.e. is invoked a lot in a short 6647 * period of time, it will trip its breaker and transition to an identity 6648 * function to avoid garbage collection pauses in V8. See 6649 * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070) 6650 * for more details. 6651 * 6652 * @private 6653 * @param {Function} func The function to associate metadata with. 6654 * @param {*} data The metadata. 6655 * @returns {Function} Returns `func`. 6656 */ 6657 var setData = shortOut(baseSetData); 6658 6659 /** 6660 * A simple wrapper around the global [`setTimeout`](https://mdn.io/setTimeout). 6661 * 6662 * @private 6663 * @param {Function} func The function to delay. 6664 * @param {number} wait The number of milliseconds to delay invocation. 6665 * @returns {number|Object} Returns the timer id or timeout object. 6666 */ 6667 var setTimeout = ctxSetTimeout || function(func, wait) { 6668 return root.setTimeout(func, wait); 6669 }; 6670 6671 /** 6672 * Sets the `toString` method of `func` to return `string`. 6673 * 6674 * @private 6675 * @param {Function} func The function to modify. 6676 * @param {Function} string The `toString` result. 6677 * @returns {Function} Returns `func`. 6678 */ 6679 var setToString = shortOut(baseSetToString); 6680 6681 /** 6682 * Sets the `toString` method of `wrapper` to mimic the source of `reference` 6683 * with wrapper details in a comment at the top of the source body. 6684 * 6685 * @private 6686 * @param {Function} wrapper The function to modify. 6687 * @param {Function} reference The reference function. 6688 * @param {number} bitmask The bitmask flags. See `createWrap` for more details. 6689 * @returns {Function} Returns `wrapper`. 6690 */ 6691 function setWrapToString(wrapper, reference, bitmask) { 6692 var source = (reference + ''); 6693 return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask))); 6694 } 6695 6696 /** 6697 * Creates a function that'll short out and invoke `identity` instead 6698 * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN` 6699 * milliseconds. 6700 * 6701 * @private 6702 * @param {Function} func The function to restrict. 6703 * @returns {Function} Returns the new shortable function. 6704 */ 6705 function shortOut(func) { 6706 var count = 0, 6707 lastCalled = 0; 6708 6709 return function() { 6710 var stamp = nativeNow(), 6711 remaining = HOT_SPAN - (stamp - lastCalled); 6712 6713 lastCalled = stamp; 6714 if (remaining > 0) { 6715 if (++count >= HOT_COUNT) { 6716 return arguments[0]; 6717 } 6718 } else { 6719 count = 0; 6720 } 6721 return func.apply(undefined, arguments); 6722 }; 6723 } 6724 6725 /** 6726 * A specialized version of `_.shuffle` which mutates and sets the size of `array`. 6727 * 6728 * @private 6729 * @param {Array} array The array to shuffle. 6730 * @param {number} [size=array.length] The size of `array`. 6731 * @returns {Array} Returns `array`. 6732 */ 6733 function shuffleSelf(array, size) { 6734 var index = -1, 6735 length = array.length, 6736 lastIndex = length - 1; 6737 6738 size = size === undefined ? length : size; 6739 while (++index < size) { 6740 var rand = baseRandom(index, lastIndex), 6741 value = array[rand]; 6742 6743 array[rand] = array[index]; 6744 array[index] = value; 6745 } 6746 array.length = size; 6747 return array; 6748 } 6749 6750 /** 6751 * Converts `string` to a property path array. 6752 * 6753 * @private 6754 * @param {string} string The string to convert. 6755 * @returns {Array} Returns the property path array. 6756 */ 6757 var stringToPath = memoizeCapped(function(string) { 6758 var result = []; 6759 if (string.charCodeAt(0) === 46 /* . */) { 6760 result.push(''); 6761 } 6762 string.replace(rePropName, function(match, number, quote, subString) { 6763 result.push(quote ? subString.replace(reEscapeChar, '$1') : (number || match)); 6764 }); 6765 return result; 6766 }); 6767 6768 /** 6769 * Converts `value` to a string key if it's not a string or symbol. 6770 * 6771 * @private 6772 * @param {*} value The value to inspect. 6773 * @returns {string|symbol} Returns the key. 6774 */ 6775 function toKey(value) { 6776 if (typeof value == 'string' || isSymbol(value)) { 6777 return value; 6778 } 6779 var result = (value + ''); 6780 return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result; 6781 } 6782 6783 /** 6784 * Converts `func` to its source code. 6785 * 6786 * @private 6787 * @param {Function} func The function to convert. 6788 * @returns {string} Returns the source code. 6789 */ 6790 function toSource(func) { 6791 if (func != null) { 6792 try { 6793 return funcToString.call(func); 6794 } catch (e) {} 6795 try { 6796 return (func + ''); 6797 } catch (e) {} 6798 } 6799 return ''; 6800 } 6801 6802 /** 6803 * Updates wrapper `details` based on `bitmask` flags. 6804 * 6805 * @private 6806 * @returns {Array} details The details to modify. 6807 * @param {number} bitmask The bitmask flags. See `createWrap` for more details. 6808 * @returns {Array} Returns `details`. 6809 */ 6810 function updateWrapDetails(details, bitmask) { 6811 arrayEach(wrapFlags, function(pair) { 6812 var value = '_.' + pair[0]; 6813 if ((bitmask & pair[1]) && !arrayIncludes(details, value)) { 6814 details.push(value); 6815 } 6816 }); 6817 return details.sort(); 6818 } 6819 6820 /** 6821 * Creates a clone of `wrapper`. 6822 * 6823 * @private 6824 * @param {Object} wrapper The wrapper to clone. 6825 * @returns {Object} Returns the cloned wrapper. 6826 */ 6827 function wrapperClone(wrapper) { 6828 if (wrapper instanceof LazyWrapper) { 6829 return wrapper.clone(); 6830 } 6831 var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__); 6832 result.__actions__ = copyArray(wrapper.__actions__); 6833 result.__index__ = wrapper.__index__; 6834 result.__values__ = wrapper.__values__; 6835 return result; 6836 } 6837 6838 /*------------------------------------------------------------------------*/ 6839 6840 /** 6841 * Creates an array of elements split into groups the length of `size`. 6842 * If `array` can't be split evenly, the final chunk will be the remaining 6843 * elements. 6844 * 6845 * @static 6846 * @memberOf _ 6847 * @since 3.0.0 6848 * @category Array 6849 * @param {Array} array The array to process. 6850 * @param {number} [size=1] The length of each chunk 6851 * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. 6852 * @returns {Array} Returns the new array of chunks. 6853 * @example 6854 * 6855 * _.chunk(['a', 'b', 'c', 'd'], 2); 6856 * // => [['a', 'b'], ['c', 'd']] 6857 * 6858 * _.chunk(['a', 'b', 'c', 'd'], 3); 6859 * // => [['a', 'b', 'c'], ['d']] 6860 */ 6861 function chunk(array, size, guard) { 6862 if ((guard ? isIterateeCall(array, size, guard) : size === undefined)) { 6863 size = 1; 6864 } else { 6865 size = nativeMax(toInteger(size), 0); 6866 } 6867 var length = array == null ? 0 : array.length; 6868 if (!length || size < 1) { 6869 return []; 6870 } 6871 var index = 0, 6872 resIndex = 0, 6873 result = Array(nativeCeil(length / size)); 6874 6875 while (index < length) { 6876 result[resIndex++] = baseSlice(array, index, (index += size)); 6877 } 6878 return result; 6879 } 6880 6881 /** 6882 * Creates an array with all falsey values removed. The values `false`, `null`, 6883 * `0`, `""`, `undefined`, and `NaN` are falsey. 6884 * 6885 * @static 6886 * @memberOf _ 6887 * @since 0.1.0 6888 * @category Array 6889 * @param {Array} array The array to compact. 6890 * @returns {Array} Returns the new array of filtered values. 6891 * @example 6892 * 6893 * _.compact([0, 1, false, 2, '', 3]); 6894 * // => [1, 2, 3] 6895 */ 6896 function compact(array) { 6897 var index = -1, 6898 length = array == null ? 0 : array.length, 6899 resIndex = 0, 6900 result = []; 6901 6902 while (++index < length) { 6903 var value = array[index]; 6904 if (value) { 6905 result[resIndex++] = value; 6906 } 6907 } 6908 return result; 6909 } 6910 6911 /** 6912 * Creates a new array concatenating `array` with any additional arrays 6913 * and/or values. 6914 * 6915 * @static 6916 * @memberOf _ 6917 * @since 4.0.0 6918 * @category Array 6919 * @param {Array} array The array to concatenate. 6920 * @param {...*} [values] The values to concatenate. 6921 * @returns {Array} Returns the new concatenated array. 6922 * @example 6923 * 6924 * var array = [1]; 6925 * var other = _.concat(array, 2, [3], [[4]]); 6926 * 6927 * console.log(other); 6928 * // => [1, 2, 3, [4]] 6929 * 6930 * console.log(array); 6931 * // => [1] 6932 */ 6933 function concat() { 6934 var length = arguments.length; 6935 if (!length) { 6936 return []; 6937 } 6938 var args = Array(length - 1), 6939 array = arguments[0], 6940 index = length; 6941 6942 while (index--) { 6943 args[index - 1] = arguments[index]; 6944 } 6945 return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1)); 6946 } 6947 6948 /** 6949 * Creates an array of `array` values not included in the other given arrays 6950 * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) 6951 * for equality comparisons. The order and references of result values are 6952 * determined by the first array. 6953 * 6954 * **Note:** Unlike `_.pullAll`, this method returns a new array. 6955 * 6956 * @static 6957 * @memberOf _ 6958 * @since 0.1.0 6959 * @category Array 6960 * @param {Array} array The array to inspect. 6961 * @param {...Array} [values] The values to exclude. 6962 * @returns {Array} Returns the new array of filtered values. 6963 * @see _.without, _.xor 6964 * @example 6965 * 6966 * _.difference([2, 1], [2, 3]); 6967 * // => [1] 6968 */ 6969 var difference = baseRest(function(array, values) { 6970 return isArrayLikeObject(array) 6971 ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true)) 6972 : []; 6973 }); 6974 6975 /** 6976 * This method is like `_.difference` except that it accepts `iteratee` which 6977 * is invoked for each element of `array` and `values` to generate the criterion 6978 * by which they're compared. The order and references of result values are 6979 * determined by the first array. The iteratee is invoked with one argument: 6980 * (value). 6981 * 6982 * **Note:** Unlike `_.pullAllBy`, this method returns a new array. 6983 * 6984 * @static 6985 * @memberOf _ 6986 * @since 4.0.0 6987 * @category Array 6988 * @param {Array} array The array to inspect. 6989 * @param {...Array} [values] The values to exclude. 6990 * @param {Function} [iteratee=_.identity] The iteratee invoked per element. 6991 * @returns {Array} Returns the new array of filtered values. 6992 * @example 6993 * 6994 * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor); 6995 * // => [1.2] 6996 * 6997 * // The `_.property` iteratee shorthand. 6998 * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x'); 6999 * // => [{ 'x': 2 }] 7000 */ 7001 var differenceBy = baseRest(function(array, values) { 7002 var iteratee = last(values); 7003 if (isArrayLikeObject(iteratee)) { 7004 iteratee = undefined; 7005 } 7006 return isArrayLikeObject(array) 7007 ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee, 2)) 7008 : []; 7009 }); 7010 7011 /** 7012 * This method is like `_.difference` except that it accepts `comparator` 7013 * which is invoked to compare elements of `array` to `values`. The order and 7014 * references of result values are determined by the first array. The comparator 7015 * is invoked with two arguments: (arrVal, othVal). 7016 * 7017 * **Note:** Unlike `_.pullAllWith`, this method returns a new array. 7018 * 7019 * @static 7020 * @memberOf _ 7021 * @since 4.0.0 7022 * @category Array 7023 * @param {Array} array The array to inspect. 7024 * @param {...Array} [values] The values to exclude. 7025 * @param {Function} [comparator] The comparator invoked per element. 7026 * @returns {Array} Returns the new array of filtered values. 7027 * @example 7028 * 7029 * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]; 7030 * 7031 * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual); 7032 * // => [{ 'x': 2, 'y': 1 }] 7033 */ 7034 var differenceWith = baseRest(function(array, values) { 7035 var comparator = last(values); 7036 if (isArrayLikeObject(comparator)) { 7037 comparator = undefined; 7038 } 7039 return isArrayLikeObject(array) 7040 ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined, comparator) 7041 : []; 7042 }); 7043 7044 /** 7045 * Creates a slice of `array` with `n` elements dropped from the beginning. 7046 * 7047 * @static 7048 * @memberOf _ 7049 * @since 0.5.0 7050 * @category Array 7051 * @param {Array} array The array to query. 7052 * @param {number} [n=1] The number of elements to drop. 7053 * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. 7054 * @returns {Array} Returns the slice of `array`. 7055 * @example 7056 * 7057 * _.drop([1, 2, 3]); 7058 * // => [2, 3] 7059 * 7060 * _.drop([1, 2, 3], 2); 7061 * // => [3] 7062 * 7063 * _.drop([1, 2, 3], 5); 7064 * // => [] 7065 * 7066 * _.drop([1, 2, 3], 0); 7067 * // => [1, 2, 3] 7068 */ 7069 function drop(array, n, guard) { 7070 var length = array == null ? 0 : array.length; 7071 if (!length) { 7072 return []; 7073 } 7074 n = (guard || n === undefined) ? 1 : toInteger(n); 7075 return baseSlice(array, n < 0 ? 0 : n, length); 7076 } 7077 7078 /** 7079 * Creates a slice of `array` with `n` elements dropped from the end. 7080 * 7081 * @static 7082 * @memberOf _ 7083 * @since 3.0.0 7084 * @category Array 7085 * @param {Array} array The array to query. 7086 * @param {number} [n=1] The number of elements to drop. 7087 * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. 7088 * @returns {Array} Returns the slice of `array`. 7089 * @example 7090 * 7091 * _.dropRight([1, 2, 3]); 7092 * // => [1, 2] 7093 * 7094 * _.dropRight([1, 2, 3], 2); 7095 * // => [1] 7096 * 7097 * _.dropRight([1, 2, 3], 5); 7098 * // => [] 7099 * 7100 * _.dropRight([1, 2, 3], 0); 7101 * // => [1, 2, 3] 7102 */ 7103 function dropRight(array, n, guard) { 7104 var length = array == null ? 0 : array.length; 7105 if (!length) { 7106 return []; 7107 } 7108 n = (guard || n === undefined) ? 1 : toInteger(n); 7109 n = length - n; 7110 return baseSlice(array, 0, n < 0 ? 0 : n); 7111 } 7112 7113 /** 7114 * Creates a slice of `array` excluding elements dropped from the end. 7115 * Elements are dropped until `predicate` returns falsey. The predicate is 7116 * invoked with three arguments: (value, index, array). 7117 * 7118 * @static 7119 * @memberOf _ 7120 * @since 3.0.0 7121 * @category Array 7122 * @param {Array} array The array to query. 7123 * @param {Function} [predicate=_.identity] The function invoked per iteration. 7124 * @returns {Array} Returns the slice of `array`. 7125 * @example 7126 * 7127 * var users = [ 7128 * { 'user': 'barney', 'active': true }, 7129 * { 'user': 'fred', 'active': false }, 7130 * { 'user': 'pebbles', 'active': false } 7131 * ]; 7132 * 7133 * _.dropRightWhile(users, function(o) { return !o.active; }); 7134 * // => objects for ['barney'] 7135 * 7136 * // The `_.matches` iteratee shorthand. 7137 * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false }); 7138 * // => objects for ['barney', 'fred'] 7139 * 7140 * // The `_.matchesProperty` iteratee shorthand. 7141 * _.dropRightWhile(users, ['active', false]); 7142 * // => objects for ['barney'] 7143 * 7144 * // The `_.property` iteratee shorthand. 7145 * _.dropRightWhile(users, 'active'); 7146 * // => objects for ['barney', 'fred', 'pebbles'] 7147 */ 7148 function dropRightWhile(array, predicate) { 7149 return (array && array.length) 7150 ? baseWhile(array, getIteratee(predicate, 3), true, true) 7151 : []; 7152 } 7153 7154 /** 7155 * Creates a slice of `array` excluding elements dropped from the beginning. 7156 * Elements are dropped until `predicate` returns falsey. The predicate is 7157 * invoked with three arguments: (value, index, array). 7158 * 7159 * @static 7160 * @memberOf _ 7161 * @since 3.0.0 7162 * @category Array 7163 * @param {Array} array The array to query. 7164 * @param {Function} [predicate=_.identity] The function invoked per iteration. 7165 * @returns {Array} Returns the slice of `array`. 7166 * @example 7167 * 7168 * var users = [ 7169 * { 'user': 'barney', 'active': false }, 7170 * { 'user': 'fred', 'active': false }, 7171 * { 'user': 'pebbles', 'active': true } 7172 * ]; 7173 * 7174 * _.dropWhile(users, function(o) { return !o.active; }); 7175 * // => objects for ['pebbles'] 7176 * 7177 * // The `_.matches` iteratee shorthand. 7178 * _.dropWhile(users, { 'user': 'barney', 'active': false }); 7179 * // => objects for ['fred', 'pebbles'] 7180 * 7181 * // The `_.matchesProperty` iteratee shorthand. 7182 * _.dropWhile(users, ['active', false]); 7183 * // => objects for ['pebbles'] 7184 * 7185 * // The `_.property` iteratee shorthand. 7186 * _.dropWhile(users, 'active'); 7187 * // => objects for ['barney', 'fred', 'pebbles'] 7188 */ 7189 function dropWhile(array, predicate) { 7190 return (array && array.length) 7191 ? baseWhile(array, getIteratee(predicate, 3), true) 7192 : []; 7193 } 7194 7195 /** 7196 * Fills elements of `array` with `value` from `start` up to, but not 7197 * including, `end`. 7198 * 7199 * **Note:** This method mutates `array`. 7200 * 7201 * @static 7202 * @memberOf _ 7203 * @since 3.2.0 7204 * @category Array 7205 * @param {Array} array The array to fill. 7206 * @param {*} value The value to fill `array` with. 7207 * @param {number} [start=0] The start position. 7208 * @param {number} [end=array.length] The end position. 7209 * @returns {Array} Returns `array`. 7210 * @example 7211 * 7212 * var array = [1, 2, 3]; 7213 * 7214 * _.fill(array, 'a'); 7215 * console.log(array); 7216 * // => ['a', 'a', 'a'] 7217 * 7218 * _.fill(Array(3), 2); 7219 * // => [2, 2, 2] 7220 * 7221 * _.fill([4, 6, 8, 10], '*', 1, 3); 7222 * // => [4, '*', '*', 10] 7223 */ 7224 function fill(array, value, start, end) { 7225 var length = array == null ? 0 : array.length; 7226 if (!length) { 7227 return []; 7228 } 7229 if (start && typeof start != 'number' && isIterateeCall(array, value, start)) { 7230 start = 0; 7231 end = length; 7232 } 7233 return baseFill(array, value, start, end); 7234 } 7235 7236 /** 7237 * This method is like `_.find` except that it returns the index of the first 7238 * element `predicate` returns truthy for instead of the element itself. 7239 * 7240 * @static 7241 * @memberOf _ 7242 * @since 1.1.0 7243 * @category Array 7244 * @param {Array} array The array to inspect. 7245 * @param {Function} [predicate=_.identity] The function invoked per iteration. 7246 * @param {number} [fromIndex=0] The index to search from. 7247 * @returns {number} Returns the index of the found element, else `-1`. 7248 * @example 7249 * 7250 * var users = [ 7251 * { 'user': 'barney', 'active': false }, 7252 * { 'user': 'fred', 'active': false }, 7253 * { 'user': 'pebbles', 'active': true } 7254 * ]; 7255 * 7256 * _.findIndex(users, function(o) { return o.user == 'barney'; }); 7257 * // => 0 7258 * 7259 * // The `_.matches` iteratee shorthand. 7260 * _.findIndex(users, { 'user': 'fred', 'active': false }); 7261 * // => 1 7262 * 7263 * // The `_.matchesProperty` iteratee shorthand. 7264 * _.findIndex(users, ['active', false]); 7265 * // => 0 7266 * 7267 * // The `_.property` iteratee shorthand. 7268 * _.findIndex(users, 'active'); 7269 * // => 2 7270 */ 7271 function findIndex(array, predicate, fromIndex) { 7272 var length = array == null ? 0 : array.length; 7273 if (!length) { 7274 return -1; 7275 } 7276 var index = fromIndex == null ? 0 : toInteger(fromIndex); 7277 if (index < 0) { 7278 index = nativeMax(length + index, 0); 7279 } 7280 return baseFindIndex(array, getIteratee(predicate, 3), index); 7281 } 7282 7283 /** 7284 * This method is like `_.findIndex` except that it iterates over elements 7285 * of `collection` from right to left. 7286 * 7287 * @static 7288 * @memberOf _ 7289 * @since 2.0.0 7290 * @category Array 7291 * @param {Array} array The array to inspect. 7292 * @param {Function} [predicate=_.identity] The function invoked per iteration. 7293 * @param {number} [fromIndex=array.length-1] The index to search from. 7294 * @returns {number} Returns the index of the found element, else `-1`. 7295 * @example 7296 * 7297 * var users = [ 7298 * { 'user': 'barney', 'active': true }, 7299 * { 'user': 'fred', 'active': false }, 7300 * { 'user': 'pebbles', 'active': false } 7301 * ]; 7302 * 7303 * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; }); 7304 * // => 2 7305 * 7306 * // The `_.matches` iteratee shorthand. 7307 * _.findLastIndex(users, { 'user': 'barney', 'active': true }); 7308 * // => 0 7309 * 7310 * // The `_.matchesProperty` iteratee shorthand. 7311 * _.findLastIndex(users, ['active', false]); 7312 * // => 2 7313 * 7314 * // The `_.property` iteratee shorthand. 7315 * _.findLastIndex(users, 'active'); 7316 * // => 0 7317 */ 7318 function findLastIndex(array, predicate, fromIndex) { 7319 var length = array == null ? 0 : array.length; 7320 if (!length) { 7321 return -1; 7322 } 7323 var index = length - 1; 7324 if (fromIndex !== undefined) { 7325 index = toInteger(fromIndex); 7326 index = fromIndex < 0 7327 ? nativeMax(length + index, 0) 7328 : nativeMin(index, length - 1); 7329 } 7330 return baseFindIndex(array, getIteratee(predicate, 3), index, true); 7331 } 7332 7333 /** 7334 * Flattens `array` a single level deep. 7335 * 7336 * @static 7337 * @memberOf _ 7338 * @since 0.1.0 7339 * @category Array 7340 * @param {Array} array The array to flatten. 7341 * @returns {Array} Returns the new flattened array. 7342 * @example 7343 * 7344 * _.flatten([1, [2, [3, [4]], 5]]); 7345 * // => [1, 2, [3, [4]], 5] 7346 */ 7347 function flatten(array) { 7348 var length = array == null ? 0 : array.length; 7349 return length ? baseFlatten(array, 1) : []; 7350 } 7351 7352 /** 7353 * Recursively flattens `array`. 7354 * 7355 * @static 7356 * @memberOf _ 7357 * @since 3.0.0 7358 * @category Array 7359 * @param {Array} array The array to flatten. 7360 * @returns {Array} Returns the new flattened array. 7361 * @example 7362 * 7363 * _.flattenDeep([1, [2, [3, [4]], 5]]); 7364 * // => [1, 2, 3, 4, 5] 7365 */ 7366 function flattenDeep(array) { 7367 var length = array == null ? 0 : array.length; 7368 return length ? baseFlatten(array, INFINITY) : []; 7369 } 7370 7371 /** 7372 * Recursively flatten `array` up to `depth` times. 7373 * 7374 * @static 7375 * @memberOf _ 7376 * @since 4.4.0 7377 * @category Array 7378 * @param {Array} array The array to flatten. 7379 * @param {number} [depth=1] The maximum recursion depth. 7380 * @returns {Array} Returns the new flattened array. 7381 * @example 7382 * 7383 * var array = [1, [2, [3, [4]], 5]]; 7384 * 7385 * _.flattenDepth(array, 1); 7386 * // => [1, 2, [3, [4]], 5] 7387 * 7388 * _.flattenDepth(array, 2); 7389 * // => [1, 2, 3, [4], 5] 7390 */ 7391 function flattenDepth(array, depth) { 7392 var length = array == null ? 0 : array.length; 7393 if (!length) { 7394 return []; 7395 } 7396 depth = depth === undefined ? 1 : toInteger(depth); 7397 return baseFlatten(array, depth); 7398 } 7399 7400 /** 7401 * The inverse of `_.toPairs`; this method returns an object composed 7402 * from key-value `pairs`. 7403 * 7404 * @static 7405 * @memberOf _ 7406 * @since 4.0.0 7407 * @category Array 7408 * @param {Array} pairs The key-value pairs. 7409 * @returns {Object} Returns the new object. 7410 * @example 7411 * 7412 * _.fromPairs([['a', 1], ['b', 2]]); 7413 * // => { 'a': 1, 'b': 2 } 7414 */ 7415 function fromPairs(pairs) { 7416 var index = -1, 7417 length = pairs == null ? 0 : pairs.length, 7418 result = {}; 7419 7420 while (++index < length) { 7421 var pair = pairs[index]; 7422 result[pair[0]] = pair[1]; 7423 } 7424 return result; 7425 } 7426 7427 /** 7428 * Gets the first element of `array`. 7429 * 7430 * @static 7431 * @memberOf _ 7432 * @since 0.1.0 7433 * @alias first 7434 * @category Array 7435 * @param {Array} array The array to query. 7436 * @returns {*} Returns the first element of `array`. 7437 * @example 7438 * 7439 * _.head([1, 2, 3]); 7440 * // => 1 7441 * 7442 * _.head([]); 7443 * // => undefined 7444 */ 7445 function head(array) { 7446 return (array && array.length) ? array[0] : undefined; 7447 } 7448 7449 /** 7450 * Gets the index at which the first occurrence of `value` is found in `array` 7451 * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) 7452 * for equality comparisons. If `fromIndex` is negative, it's used as the 7453 * offset from the end of `array`. 7454 * 7455 * @static 7456 * @memberOf _ 7457 * @since 0.1.0 7458 * @category Array 7459 * @param {Array} array The array to inspect. 7460 * @param {*} value The value to search for. 7461 * @param {number} [fromIndex=0] The index to search from. 7462 * @returns {number} Returns the index of the matched value, else `-1`. 7463 * @example 7464 * 7465 * _.indexOf([1, 2, 1, 2], 2); 7466 * // => 1 7467 * 7468 * // Search from the `fromIndex`. 7469 * _.indexOf([1, 2, 1, 2], 2, 2); 7470 * // => 3 7471 */ 7472 function indexOf(array, value, fromIndex) { 7473 var length = array == null ? 0 : array.length; 7474 if (!length) { 7475 return -1; 7476 } 7477 var index = fromIndex == null ? 0 : toInteger(fromIndex); 7478 if (index < 0) { 7479 index = nativeMax(length + index, 0); 7480 } 7481 return baseIndexOf(array, value, index); 7482 } 7483 7484 /** 7485 * Gets all but the last element of `array`. 7486 * 7487 * @static 7488 * @memberOf _ 7489 * @since 0.1.0 7490 * @category Array 7491 * @param {Array} array The array to query. 7492 * @returns {Array} Returns the slice of `array`. 7493 * @example 7494 * 7495 * _.initial([1, 2, 3]); 7496 * // => [1, 2] 7497 */ 7498 function initial(array) { 7499 var length = array == null ? 0 : array.length; 7500 return length ? baseSlice(array, 0, -1) : []; 7501 } 7502 7503 /** 7504 * Creates an array of unique values that are included in all given arrays 7505 * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) 7506 * for equality comparisons. The order and references of result values are 7507 * determined by the first array. 7508 * 7509 * @static 7510 * @memberOf _ 7511 * @since 0.1.0 7512 * @category Array 7513 * @param {...Array} [arrays] The arrays to inspect. 7514 * @returns {Array} Returns the new array of intersecting values. 7515 * @example 7516 * 7517 * _.intersection([2, 1], [2, 3]); 7518 * // => [2] 7519 */ 7520 var intersection = baseRest(function(arrays) { 7521 var mapped = arrayMap(arrays, castArrayLikeObject); 7522 return (mapped.length && mapped[0] === arrays[0]) 7523 ? baseIntersection(mapped) 7524 : []; 7525 }); 7526 7527 /** 7528 * This method is like `_.intersection` except that it accepts `iteratee` 7529 * which is invoked for each element of each `arrays` to generate the criterion 7530 * by which they're compared. The order and references of result values are 7531 * determined by the first array. The iteratee is invoked with one argument: 7532 * (value). 7533 * 7534 * @static 7535 * @memberOf _ 7536 * @since 4.0.0 7537 * @category Array 7538 * @param {...Array} [arrays] The arrays to inspect. 7539 * @param {Function} [iteratee=_.identity] The iteratee invoked per element. 7540 * @returns {Array} Returns the new array of intersecting values. 7541 * @example 7542 * 7543 * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor); 7544 * // => [2.1] 7545 * 7546 * // The `_.property` iteratee shorthand. 7547 * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x'); 7548 * // => [{ 'x': 1 }] 7549 */ 7550 var intersectionBy = baseRest(function(arrays) { 7551 var iteratee = last(arrays), 7552 mapped = arrayMap(arrays, castArrayLikeObject); 7553 7554 if (iteratee === last(mapped)) { 7555 iteratee = undefined; 7556 } else { 7557 mapped.pop(); 7558 } 7559 return (mapped.length && mapped[0] === arrays[0]) 7560 ? baseIntersection(mapped, getIteratee(iteratee, 2)) 7561 : []; 7562 }); 7563 7564 /** 7565 * This method is like `_.intersection` except that it accepts `comparator` 7566 * which is invoked to compare elements of `arrays`. The order and references 7567 * of result values are determined by the first array. The comparator is 7568 * invoked with two arguments: (arrVal, othVal). 7569 * 7570 * @static 7571 * @memberOf _ 7572 * @since 4.0.0 7573 * @category Array 7574 * @param {...Array} [arrays] The arrays to inspect. 7575 * @param {Function} [comparator] The comparator invoked per element. 7576 * @returns {Array} Returns the new array of intersecting values. 7577 * @example 7578 * 7579 * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]; 7580 * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }]; 7581 * 7582 * _.intersectionWith(objects, others, _.isEqual); 7583 * // => [{ 'x': 1, 'y': 2 }] 7584 */ 7585 var intersectionWith = baseRest(function(arrays) { 7586 var comparator = last(arrays), 7587 mapped = arrayMap(arrays, castArrayLikeObject); 7588 7589 comparator = typeof comparator == 'function' ? comparator : undefined; 7590 if (comparator) { 7591 mapped.pop(); 7592 } 7593 return (mapped.length && mapped[0] === arrays[0]) 7594 ? baseIntersection(mapped, undefined, comparator) 7595 : []; 7596 }); 7597 7598 /** 7599 * Converts all elements in `array` into a string separated by `separator`. 7600 * 7601 * @static 7602 * @memberOf _ 7603 * @since 4.0.0 7604 * @category Array 7605 * @param {Array} array The array to convert. 7606 * @param {string} [separator=','] The element separator. 7607 * @returns {string} Returns the joined string. 7608 * @example 7609 * 7610 * _.join(['a', 'b', 'c'], '~'); 7611 * // => 'a~b~c' 7612 */ 7613 function join(array, separator) { 7614 return array == null ? '' : nativeJoin.call(array, separator); 7615 } 7616 7617 /** 7618 * Gets the last element of `array`. 7619 * 7620 * @static 7621 * @memberOf _ 7622 * @since 0.1.0 7623 * @category Array 7624 * @param {Array} array The array to query. 7625 * @returns {*} Returns the last element of `array`. 7626 * @example 7627 * 7628 * _.last([1, 2, 3]); 7629 * // => 3 7630 */ 7631 function last(array) { 7632 var length = array == null ? 0 : array.length; 7633 return length ? array[length - 1] : undefined; 7634 } 7635 7636 /** 7637 * This method is like `_.indexOf` except that it iterates over elements of 7638 * `array` from right to left. 7639 * 7640 * @static 7641 * @memberOf _ 7642 * @since 0.1.0 7643 * @category Array 7644 * @param {Array} array The array to inspect. 7645 * @param {*} value The value to search for. 7646 * @param {number} [fromIndex=array.length-1] The index to search from. 7647 * @returns {number} Returns the index of the matched value, else `-1`. 7648 * @example 7649 * 7650 * _.lastIndexOf([1, 2, 1, 2], 2); 7651 * // => 3 7652 * 7653 * // Search from the `fromIndex`. 7654 * _.lastIndexOf([1, 2, 1, 2], 2, 2); 7655 * // => 1 7656 */ 7657 function lastIndexOf(array, value, fromIndex) { 7658 var length = array == null ? 0 : array.length; 7659 if (!length) { 7660 return -1; 7661 } 7662 var index = length; 7663 if (fromIndex !== undefined) { 7664 index = toInteger(fromIndex); 7665 index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1); 7666 } 7667 return value === value 7668 ? strictLastIndexOf(array, value, index) 7669 : baseFindIndex(array, baseIsNaN, index, true); 7670 } 7671 7672 /** 7673 * Gets the element at index `n` of `array`. If `n` is negative, the nth 7674 * element from the end is returned. 7675 * 7676 * @static 7677 * @memberOf _ 7678 * @since 4.11.0 7679 * @category Array 7680 * @param {Array} array The array to query. 7681 * @param {number} [n=0] The index of the element to return. 7682 * @returns {*} Returns the nth element of `array`. 7683 * @example 7684 * 7685 * var array = ['a', 'b', 'c', 'd']; 7686 * 7687 * _.nth(array, 1); 7688 * // => 'b' 7689 * 7690 * _.nth(array, -2); 7691 * // => 'c'; 7692 */ 7693 function nth(array, n) { 7694 return (array && array.length) ? baseNth(array, toInteger(n)) : undefined; 7695 } 7696 7697 /** 7698 * Removes all given values from `array` using 7699 * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) 7700 * for equality comparisons. 7701 * 7702 * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove` 7703 * to remove elements from an array by predicate. 7704 * 7705 * @static 7706 * @memberOf _ 7707 * @since 2.0.0 7708 * @category Array 7709 * @param {Array} array The array to modify. 7710 * @param {...*} [values] The values to remove. 7711 * @returns {Array} Returns `array`. 7712 * @example 7713 * 7714 * var array = ['a', 'b', 'c', 'a', 'b', 'c']; 7715 * 7716 * _.pull(array, 'a', 'c'); 7717 * console.log(array); 7718 * // => ['b', 'b'] 7719 */ 7720 var pull = baseRest(pullAll); 7721 7722 /** 7723 * This method is like `_.pull` except that it accepts an array of values to remove. 7724 * 7725 * **Note:** Unlike `_.difference`, this method mutates `array`. 7726 * 7727 * @static 7728 * @memberOf _ 7729 * @since 4.0.0 7730 * @category Array 7731 * @param {Array} array The array to modify. 7732 * @param {Array} values The values to remove. 7733 * @returns {Array} Returns `array`. 7734 * @example 7735 * 7736 * var array = ['a', 'b', 'c', 'a', 'b', 'c']; 7737 * 7738 * _.pullAll(array, ['a', 'c']); 7739 * console.log(array); 7740 * // => ['b', 'b'] 7741 */ 7742 function pullAll(array, values) { 7743 return (array && array.length && values && values.length) 7744 ? basePullAll(array, values) 7745 : array; 7746 } 7747 7748 /** 7749 * This method is like `_.pullAll` except that it accepts `iteratee` which is 7750 * invoked for each element of `array` and `values` to generate the criterion 7751 * by which they're compared. The iteratee is invoked with one argument: (value). 7752 * 7753 * **Note:** Unlike `_.differenceBy`, this method mutates `array`. 7754 * 7755 * @static 7756 * @memberOf _ 7757 * @since 4.0.0 7758 * @category Array 7759 * @param {Array} array The array to modify. 7760 * @param {Array} values The values to remove. 7761 * @param {Function} [iteratee=_.identity] The iteratee invoked per element. 7762 * @returns {Array} Returns `array`. 7763 * @example 7764 * 7765 * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }]; 7766 * 7767 * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x'); 7768 * console.log(array); 7769 * // => [{ 'x': 2 }] 7770 */ 7771 function pullAllBy(array, values, iteratee) { 7772 return (array && array.length && values && values.length) 7773 ? basePullAll(array, values, getIteratee(iteratee, 2)) 7774 : array; 7775 } 7776 7777 /** 7778 * This method is like `_.pullAll` except that it accepts `comparator` which 7779 * is invoked to compare elements of `array` to `values`. The comparator is 7780 * invoked with two arguments: (arrVal, othVal). 7781 * 7782 * **Note:** Unlike `_.differenceWith`, this method mutates `array`. 7783 * 7784 * @static 7785 * @memberOf _ 7786 * @since 4.6.0 7787 * @category Array 7788 * @param {Array} array The array to modify. 7789 * @param {Array} values The values to remove. 7790 * @param {Function} [comparator] The comparator invoked per element. 7791 * @returns {Array} Returns `array`. 7792 * @example 7793 * 7794 * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }]; 7795 * 7796 * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual); 7797 * console.log(array); 7798 * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }] 7799 */ 7800 function pullAllWith(array, values, comparator) { 7801 return (array && array.length && values && values.length) 7802 ? basePullAll(array, values, undefined, comparator) 7803 : array; 7804 } 7805 7806 /** 7807 * Removes elements from `array` corresponding to `indexes` and returns an 7808 * array of removed elements. 7809 * 7810 * **Note:** Unlike `_.at`, this method mutates `array`. 7811 * 7812 * @static 7813 * @memberOf _ 7814 * @since 3.0.0 7815 * @category Array 7816 * @param {Array} array The array to modify. 7817 * @param {...(number|number[])} [indexes] The indexes of elements to remove. 7818 * @returns {Array} Returns the new array of removed elements. 7819 * @example 7820 * 7821 * var array = ['a', 'b', 'c', 'd']; 7822 * var pulled = _.pullAt(array, [1, 3]); 7823 * 7824 * console.log(array); 7825 * // => ['a', 'c'] 7826 * 7827 * console.log(pulled); 7828 * // => ['b', 'd'] 7829 */ 7830 var pullAt = flatRest(function(array, indexes) { 7831 var length = array == null ? 0 : array.length, 7832 result = baseAt(array, indexes); 7833 7834 basePullAt(array, arrayMap(indexes, function(index) { 7835 return isIndex(index, length) ? +index : index; 7836 }).sort(compareAscending)); 7837 7838 return result; 7839 }); 7840 7841 /** 7842 * Removes all elements from `array` that `predicate` returns truthy for 7843 * and returns an array of the removed elements. The predicate is invoked 7844 * with three arguments: (value, index, array). 7845 * 7846 * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull` 7847 * to pull elements from an array by value. 7848 * 7849 * @static 7850 * @memberOf _ 7851 * @since 2.0.0 7852 * @category Array 7853 * @param {Array} array The array to modify. 7854 * @param {Function} [predicate=_.identity] The function invoked per iteration. 7855 * @returns {Array} Returns the new array of removed elements. 7856 * @example 7857 * 7858 * var array = [1, 2, 3, 4]; 7859 * var evens = _.remove(array, function(n) { 7860 * return n % 2 == 0; 7861 * }); 7862 * 7863 * console.log(array); 7864 * // => [1, 3] 7865 * 7866 * console.log(evens); 7867 * // => [2, 4] 7868 */ 7869 function remove(array, predicate) { 7870 var result = []; 7871 if (!(array && array.length)) { 7872 return result; 7873 } 7874 var index = -1, 7875 indexes = [], 7876 length = array.length; 7877 7878 predicate = getIteratee(predicate, 3); 7879 while (++index < length) { 7880 var value = array[index]; 7881 if (predicate(value, index, array)) { 7882 result.push(value); 7883 indexes.push(index); 7884 } 7885 } 7886 basePullAt(array, indexes); 7887 return result; 7888 } 7889 7890 /** 7891 * Reverses `array` so that the first element becomes the last, the second 7892 * element becomes the second to last, and so on. 7893 * 7894 * **Note:** This method mutates `array` and is based on 7895 * [`Array#reverse`](https://mdn.io/Array/reverse). 7896 * 7897 * @static 7898 * @memberOf _ 7899 * @since 4.0.0 7900 * @category Array 7901 * @param {Array} array The array to modify. 7902 * @returns {Array} Returns `array`. 7903 * @example 7904 * 7905 * var array = [1, 2, 3]; 7906 * 7907 * _.reverse(array); 7908 * // => [3, 2, 1] 7909 * 7910 * console.log(array); 7911 * // => [3, 2, 1] 7912 */ 7913 function reverse(array) { 7914 return array == null ? array : nativeReverse.call(array); 7915 } 7916 7917 /** 7918 * Creates a slice of `array` from `start` up to, but not including, `end`. 7919 * 7920 * **Note:** This method is used instead of 7921 * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are 7922 * returned. 7923 * 7924 * @static 7925 * @memberOf _ 7926 * @since 3.0.0 7927 * @category Array 7928 * @param {Array} array The array to slice. 7929 * @param {number} [start=0] The start position. 7930 * @param {number} [end=array.length] The end position. 7931 * @returns {Array} Returns the slice of `array`. 7932 */ 7933 function slice(array, start, end) { 7934 var length = array == null ? 0 : array.length; 7935 if (!length) { 7936 return []; 7937 } 7938 if (end && typeof end != 'number' && isIterateeCall(array, start, end)) { 7939 start = 0; 7940 end = length; 7941 } 7942 else { 7943 start = start == null ? 0 : toInteger(start); 7944 end = end === undefined ? length : toInteger(end); 7945 } 7946 return baseSlice(array, start, end); 7947 } 7948 7949 /** 7950 * Uses a binary search to determine the lowest index at which `value` 7951 * should be inserted into `array` in order to maintain its sort order. 7952 * 7953 * @static 7954 * @memberOf _ 7955 * @since 0.1.0 7956 * @category Array 7957 * @param {Array} array The sorted array to inspect. 7958 * @param {*} value The value to evaluate. 7959 * @returns {number} Returns the index at which `value` should be inserted 7960 * into `array`. 7961 * @example 7962 * 7963 * _.sortedIndex([30, 50], 40); 7964 * // => 1 7965 */ 7966 function sortedIndex(array, value) { 7967 return baseSortedIndex(array, value); 7968 } 7969 7970 /** 7971 * This method is like `_.sortedIndex` except that it accepts `iteratee` 7972 * which is invoked for `value` and each element of `array` to compute their 7973 * sort ranking. The iteratee is invoked with one argument: (value). 7974 * 7975 * @static 7976 * @memberOf _ 7977 * @since 4.0.0 7978 * @category Array 7979 * @param {Array} array The sorted array to inspect. 7980 * @param {*} value The value to evaluate. 7981 * @param {Function} [iteratee=_.identity] The iteratee invoked per element. 7982 * @returns {number} Returns the index at which `value` should be inserted 7983 * into `array`. 7984 * @example 7985 * 7986 * var objects = [{ 'x': 4 }, { 'x': 5 }]; 7987 * 7988 * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; }); 7989 * // => 0 7990 * 7991 * // The `_.property` iteratee shorthand. 7992 * _.sortedIndexBy(objects, { 'x': 4 }, 'x'); 7993 * // => 0 7994 */ 7995 function sortedIndexBy(array, value, iteratee) { 7996 return baseSortedIndexBy(array, value, getIteratee(iteratee, 2)); 7997 } 7998 7999 /** 8000 * This method is like `_.indexOf` except that it performs a binary 8001 * search on a sorted `array`. 8002 * 8003 * @static 8004 * @memberOf _ 8005 * @since 4.0.0 8006 * @category Array 8007 * @param {Array} array The array to inspect. 8008 * @param {*} value The value to search for. 8009 * @returns {number} Returns the index of the matched value, else `-1`. 8010 * @example 8011 * 8012 * _.sortedIndexOf([4, 5, 5, 5, 6], 5); 8013 * // => 1 8014 */ 8015 function sortedIndexOf(array, value) { 8016 var length = array == null ? 0 : array.length; 8017 if (length) { 8018 var index = baseSortedIndex(array, value); 8019 if (index < length && eq(array[index], value)) { 8020 return index; 8021 } 8022 } 8023 return -1; 8024 } 8025 8026 /** 8027 * This method is like `_.sortedIndex` except that it returns the highest 8028 * index at which `value` should be inserted into `array` in order to 8029 * maintain its sort order. 8030 * 8031 * @static 8032 * @memberOf _ 8033 * @since 3.0.0 8034 * @category Array 8035 * @param {Array} array The sorted array to inspect. 8036 * @param {*} value The value to evaluate. 8037 * @returns {number} Returns the index at which `value` should be inserted 8038 * into `array`. 8039 * @example 8040 * 8041 * _.sortedLastIndex([4, 5, 5, 5, 6], 5); 8042 * // => 4 8043 */ 8044 function sortedLastIndex(array, value) { 8045 return baseSortedIndex(array, value, true); 8046 } 8047 8048 /** 8049 * This method is like `_.sortedLastIndex` except that it accepts `iteratee` 8050 * which is invoked for `value` and each element of `array` to compute their 8051 * sort ranking. The iteratee is invoked with one argument: (value). 8052 * 8053 * @static 8054 * @memberOf _ 8055 * @since 4.0.0 8056 * @category Array 8057 * @param {Array} array The sorted array to inspect. 8058 * @param {*} value The value to evaluate. 8059 * @param {Function} [iteratee=_.identity] The iteratee invoked per element. 8060 * @returns {number} Returns the index at which `value` should be inserted 8061 * into `array`. 8062 * @example 8063 * 8064 * var objects = [{ 'x': 4 }, { 'x': 5 }]; 8065 * 8066 * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; }); 8067 * // => 1 8068 * 8069 * // The `_.property` iteratee shorthand. 8070 * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x'); 8071 * // => 1 8072 */ 8073 function sortedLastIndexBy(array, value, iteratee) { 8074 return baseSortedIndexBy(array, value, getIteratee(iteratee, 2), true); 8075 } 8076 8077 /** 8078 * This method is like `_.lastIndexOf` except that it performs a binary 8079 * search on a sorted `array`. 8080 * 8081 * @static 8082 * @memberOf _ 8083 * @since 4.0.0 8084 * @category Array 8085 * @param {Array} array The array to inspect. 8086 * @param {*} value The value to search for. 8087 * @returns {number} Returns the index of the matched value, else `-1`. 8088 * @example 8089 * 8090 * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5); 8091 * // => 3 8092 */ 8093 function sortedLastIndexOf(array, value) { 8094 var length = array == null ? 0 : array.length; 8095 if (length) { 8096 var index = baseSortedIndex(array, value, true) - 1; 8097 if (eq(array[index], value)) { 8098 return index; 8099 } 8100 } 8101 return -1; 8102 } 8103 8104 /** 8105 * This method is like `_.uniq` except that it's designed and optimized 8106 * for sorted arrays. 8107 * 8108 * @static 8109 * @memberOf _ 8110 * @since 4.0.0 8111 * @category Array 8112 * @param {Array} array The array to inspect. 8113 * @returns {Array} Returns the new duplicate free array. 8114 * @example 8115 * 8116 * _.sortedUniq([1, 1, 2]); 8117 * // => [1, 2] 8118 */ 8119 function sortedUniq(array) { 8120 return (array && array.length) 8121 ? baseSortedUniq(array) 8122 : []; 8123 } 8124 8125 /** 8126 * This method is like `_.uniqBy` except that it's designed and optimized 8127 * for sorted arrays. 8128 * 8129 * @static 8130 * @memberOf _ 8131 * @since 4.0.0 8132 * @category Array 8133 * @param {Array} array The array to inspect. 8134 * @param {Function} [iteratee] The iteratee invoked per element. 8135 * @returns {Array} Returns the new duplicate free array. 8136 * @example 8137 * 8138 * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor); 8139 * // => [1.1, 2.3] 8140 */ 8141 function sortedUniqBy(array, iteratee) { 8142 return (array && array.length) 8143 ? baseSortedUniq(array, getIteratee(iteratee, 2)) 8144 : []; 8145 } 8146 8147 /** 8148 * Gets all but the first element of `array`. 8149 * 8150 * @static 8151 * @memberOf _ 8152 * @since 4.0.0 8153 * @category Array 8154 * @param {Array} array The array to query. 8155 * @returns {Array} Returns the slice of `array`. 8156 * @example 8157 * 8158 * _.tail([1, 2, 3]); 8159 * // => [2, 3] 8160 */ 8161 function tail(array) { 8162 var length = array == null ? 0 : array.length; 8163 return length ? baseSlice(array, 1, length) : []; 8164 } 8165 8166 /** 8167 * Creates a slice of `array` with `n` elements taken from the beginning. 8168 * 8169 * @static 8170 * @memberOf _ 8171 * @since 0.1.0 8172 * @category Array 8173 * @param {Array} array The array to query. 8174 * @param {number} [n=1] The number of elements to take. 8175 * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. 8176 * @returns {Array} Returns the slice of `array`. 8177 * @example 8178 * 8179 * _.take([1, 2, 3]); 8180 * // => [1] 8181 * 8182 * _.take([1, 2, 3], 2); 8183 * // => [1, 2] 8184 * 8185 * _.take([1, 2, 3], 5); 8186 * // => [1, 2, 3] 8187 * 8188 * _.take([1, 2, 3], 0); 8189 * // => [] 8190 */ 8191 function take(array, n, guard) { 8192 if (!(array && array.length)) { 8193 return []; 8194 } 8195 n = (guard || n === undefined) ? 1 : toInteger(n); 8196 return baseSlice(array, 0, n < 0 ? 0 : n); 8197 } 8198 8199 /** 8200 * Creates a slice of `array` with `n` elements taken from the end. 8201 * 8202 * @static 8203 * @memberOf _ 8204 * @since 3.0.0 8205 * @category Array 8206 * @param {Array} array The array to query. 8207 * @param {number} [n=1] The number of elements to take. 8208 * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. 8209 * @returns {Array} Returns the slice of `array`. 8210 * @example 8211 * 8212 * _.takeRight([1, 2, 3]); 8213 * // => [3] 8214 * 8215 * _.takeRight([1, 2, 3], 2); 8216 * // => [2, 3] 8217 * 8218 * _.takeRight([1, 2, 3], 5); 8219 * // => [1, 2, 3] 8220 * 8221 * _.takeRight([1, 2, 3], 0); 8222 * // => [] 8223 */ 8224 function takeRight(array, n, guard) { 8225 var length = array == null ? 0 : array.length; 8226 if (!length) { 8227 return []; 8228 } 8229 n = (guard || n === undefined) ? 1 : toInteger(n); 8230 n = length - n; 8231 return baseSlice(array, n < 0 ? 0 : n, length); 8232 } 8233 8234 /** 8235 * Creates a slice of `array` with elements taken from the end. Elements are 8236 * taken until `predicate` returns falsey. The predicate is invoked with 8237 * three arguments: (value, index, array). 8238 * 8239 * @static 8240 * @memberOf _ 8241 * @since 3.0.0 8242 * @category Array 8243 * @param {Array} array The array to query. 8244 * @param {Function} [predicate=_.identity] The function invoked per iteration. 8245 * @returns {Array} Returns the slice of `array`. 8246 * @example 8247 * 8248 * var users = [ 8249 * { 'user': 'barney', 'active': true }, 8250 * { 'user': 'fred', 'active': false }, 8251 * { 'user': 'pebbles', 'active': false } 8252 * ]; 8253 * 8254 * _.takeRightWhile(users, function(o) { return !o.active; }); 8255 * // => objects for ['fred', 'pebbles'] 8256 * 8257 * // The `_.matches` iteratee shorthand. 8258 * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false }); 8259 * // => objects for ['pebbles'] 8260 * 8261 * // The `_.matchesProperty` iteratee shorthand. 8262 * _.takeRightWhile(users, ['active', false]); 8263 * // => objects for ['fred', 'pebbles'] 8264 * 8265 * // The `_.property` iteratee shorthand. 8266 * _.takeRightWhile(users, 'active'); 8267 * // => [] 8268 */ 8269 function takeRightWhile(array, predicate) { 8270 return (array && array.length) 8271 ? baseWhile(array, getIteratee(predicate, 3), false, true) 8272 : []; 8273 } 8274 8275 /** 8276 * Creates a slice of `array` with elements taken from the beginning. Elements 8277 * are taken until `predicate` returns falsey. The predicate is invoked with 8278 * three arguments: (value, index, array). 8279 * 8280 * @static 8281 * @memberOf _ 8282 * @since 3.0.0 8283 * @category Array 8284 * @param {Array} array The array to query. 8285 * @param {Function} [predicate=_.identity] The function invoked per iteration. 8286 * @returns {Array} Returns the slice of `array`. 8287 * @example 8288 * 8289 * var users = [ 8290 * { 'user': 'barney', 'active': false }, 8291 * { 'user': 'fred', 'active': false }, 8292 * { 'user': 'pebbles', 'active': true } 8293 * ]; 8294 * 8295 * _.takeWhile(users, function(o) { return !o.active; }); 8296 * // => objects for ['barney', 'fred'] 8297 * 8298 * // The `_.matches` iteratee shorthand. 8299 * _.takeWhile(users, { 'user': 'barney', 'active': false }); 8300 * // => objects for ['barney'] 8301 * 8302 * // The `_.matchesProperty` iteratee shorthand. 8303 * _.takeWhile(users, ['active', false]); 8304 * // => objects for ['barney', 'fred'] 8305 * 8306 * // The `_.property` iteratee shorthand. 8307 * _.takeWhile(users, 'active'); 8308 * // => [] 8309 */ 8310 function takeWhile(array, predicate) { 8311 return (array && array.length) 8312 ? baseWhile(array, getIteratee(predicate, 3)) 8313 : []; 8314 } 8315 8316 /** 8317 * Creates an array of unique values, in order, from all given arrays using 8318 * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) 8319 * for equality comparisons. 8320 * 8321 * @static 8322 * @memberOf _ 8323 * @since 0.1.0 8324 * @category Array 8325 * @param {...Array} [arrays] The arrays to inspect. 8326 * @returns {Array} Returns the new array of combined values. 8327 * @example 8328 * 8329 * _.union([2], [1, 2]); 8330 * // => [2, 1] 8331 */ 8332 var union = baseRest(function(arrays) { 8333 return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true)); 8334 }); 8335 8336 /** 8337 * This method is like `_.union` except that it accepts `iteratee` which is 8338 * invoked for each element of each `arrays` to generate the criterion by 8339 * which uniqueness is computed. Result values are chosen from the first 8340 * array in which the value occurs. The iteratee is invoked with one argument: 8341 * (value). 8342 * 8343 * @static 8344 * @memberOf _ 8345 * @since 4.0.0 8346 * @category Array 8347 * @param {...Array} [arrays] The arrays to inspect. 8348 * @param {Function} [iteratee=_.identity] The iteratee invoked per element. 8349 * @returns {Array} Returns the new array of combined values. 8350 * @example 8351 * 8352 * _.unionBy([2.1], [1.2, 2.3], Math.floor); 8353 * // => [2.1, 1.2] 8354 * 8355 * // The `_.property` iteratee shorthand. 8356 * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x'); 8357 * // => [{ 'x': 1 }, { 'x': 2 }] 8358 */ 8359 var unionBy = baseRest(function(arrays) { 8360 var iteratee = last(arrays); 8361 if (isArrayLikeObject(iteratee)) { 8362 iteratee = undefined; 8363 } 8364 return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee, 2)); 8365 }); 8366 8367 /** 8368 * This method is like `_.union` except that it accepts `comparator` which 8369 * is invoked to compare elements of `arrays`. Result values are chosen from 8370 * the first array in which the value occurs. The comparator is invoked 8371 * with two arguments: (arrVal, othVal). 8372 * 8373 * @static 8374 * @memberOf _ 8375 * @since 4.0.0 8376 * @category Array 8377 * @param {...Array} [arrays] The arrays to inspect. 8378 * @param {Function} [comparator] The comparator invoked per element. 8379 * @returns {Array} Returns the new array of combined values. 8380 * @example 8381 * 8382 * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]; 8383 * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }]; 8384 * 8385 * _.unionWith(objects, others, _.isEqual); 8386 * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }] 8387 */ 8388 var unionWith = baseRest(function(arrays) { 8389 var comparator = last(arrays); 8390 comparator = typeof comparator == 'function' ? comparator : undefined; 8391 return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator); 8392 }); 8393 8394 /** 8395 * Creates a duplicate-free version of an array, using 8396 * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) 8397 * for equality comparisons, in which only the first occurrence of each element 8398 * is kept. The order of result values is determined by the order they occur 8399 * in the array. 8400 * 8401 * @static 8402 * @memberOf _ 8403 * @since 0.1.0 8404 * @category Array 8405 * @param {Array} array The array to inspect. 8406 * @returns {Array} Returns the new duplicate free array. 8407 * @example 8408 * 8409 * _.uniq([2, 1, 2]); 8410 * // => [2, 1] 8411 */ 8412 function uniq(array) { 8413 return (array && array.length) ? baseUniq(array) : []; 8414 } 8415 8416 /** 8417 * This method is like `_.uniq` except that it accepts `iteratee` which is 8418 * invoked for each element in `array` to generate the criterion by which 8419 * uniqueness is computed. The order of result values is determined by the 8420 * order they occur in the array. The iteratee is invoked with one argument: 8421 * (value). 8422 * 8423 * @static 8424 * @memberOf _ 8425 * @since 4.0.0 8426 * @category Array 8427 * @param {Array} array The array to inspect. 8428 * @param {Function} [iteratee=_.identity] The iteratee invoked per element. 8429 * @returns {Array} Returns the new duplicate free array. 8430 * @example 8431 * 8432 * _.uniqBy([2.1, 1.2, 2.3], Math.floor); 8433 * // => [2.1, 1.2] 8434 * 8435 * // The `_.property` iteratee shorthand. 8436 * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x'); 8437 * // => [{ 'x': 1 }, { 'x': 2 }] 8438 */ 8439 function uniqBy(array, iteratee) { 8440 return (array && array.length) ? baseUniq(array, getIteratee(iteratee, 2)) : []; 8441 } 8442 8443 /** 8444 * This method is like `_.uniq` except that it accepts `comparator` which 8445 * is invoked to compare elements of `array`. The order of result values is 8446 * determined by the order they occur in the array.The comparator is invoked 8447 * with two arguments: (arrVal, othVal). 8448 * 8449 * @static 8450 * @memberOf _ 8451 * @since 4.0.0 8452 * @category Array 8453 * @param {Array} array The array to inspect. 8454 * @param {Function} [comparator] The comparator invoked per element. 8455 * @returns {Array} Returns the new duplicate free array. 8456 * @example 8457 * 8458 * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }]; 8459 * 8460 * _.uniqWith(objects, _.isEqual); 8461 * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }] 8462 */ 8463 function uniqWith(array, comparator) { 8464 comparator = typeof comparator == 'function' ? comparator : undefined; 8465 return (array && array.length) ? baseUniq(array, undefined, comparator) : []; 8466 } 8467 8468 /** 8469 * This method is like `_.zip` except that it accepts an array of grouped 8470 * elements and creates an array regrouping the elements to their pre-zip 8471 * configuration. 8472 * 8473 * @static 8474 * @memberOf _ 8475 * @since 1.2.0 8476 * @category Array 8477 * @param {Array} array The array of grouped elements to process. 8478 * @returns {Array} Returns the new array of regrouped elements. 8479 * @example 8480 * 8481 * var zipped = _.zip(['a', 'b'], [1, 2], [true, false]); 8482 * // => [['a', 1, true], ['b', 2, false]] 8483 * 8484 * _.unzip(zipped); 8485 * // => [['a', 'b'], [1, 2], [true, false]] 8486 */ 8487 function unzip(array) { 8488 if (!(array && array.length)) { 8489 return []; 8490 } 8491 var length = 0; 8492 array = arrayFilter(array, function(group) { 8493 if (isArrayLikeObject(group)) { 8494 length = nativeMax(group.length, length); 8495 return true; 8496 } 8497 }); 8498 return baseTimes(length, function(index) { 8499 return arrayMap(array, baseProperty(index)); 8500 }); 8501 } 8502 8503 /** 8504 * This method is like `_.unzip` except that it accepts `iteratee` to specify 8505 * how regrouped values should be combined. The iteratee is invoked with the 8506 * elements of each group: (...group). 8507 * 8508 * @static 8509 * @memberOf _ 8510 * @since 3.8.0 8511 * @category Array 8512 * @param {Array} array The array of grouped elements to process. 8513 * @param {Function} [iteratee=_.identity] The function to combine 8514 * regrouped values. 8515 * @returns {Array} Returns the new array of regrouped elements. 8516 * @example 8517 * 8518 * var zipped = _.zip([1, 2], [10, 20], [100, 200]); 8519 * // => [[1, 10, 100], [2, 20, 200]] 8520 * 8521 * _.unzipWith(zipped, _.add); 8522 * // => [3, 30, 300] 8523 */ 8524 function unzipWith(array, iteratee) { 8525 if (!(array && array.length)) { 8526 return []; 8527 } 8528 var result = unzip(array); 8529 if (iteratee == null) { 8530 return result; 8531 } 8532 return arrayMap(result, function(group) { 8533 return apply(iteratee, undefined, group); 8534 }); 8535 } 8536 8537 /** 8538 * Creates an array excluding all given values using 8539 * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) 8540 * for equality comparisons. 8541 * 8542 * **Note:** Unlike `_.pull`, this method returns a new array. 8543 * 8544 * @static 8545 * @memberOf _ 8546 * @since 0.1.0 8547 * @category Array 8548 * @param {Array} array The array to inspect. 8549 * @param {...*} [values] The values to exclude. 8550 * @returns {Array} Returns the new array of filtered values. 8551 * @see _.difference, _.xor 8552 * @example 8553 * 8554 * _.without([2, 1, 2, 3], 1, 2); 8555 * // => [3] 8556 */ 8557 var without = baseRest(function(array, values) { 8558 return isArrayLikeObject(array) 8559 ? baseDifference(array, values) 8560 : []; 8561 }); 8562 8563 /** 8564 * Creates an array of unique values that is the 8565 * [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference) 8566 * of the given arrays. The order of result values is determined by the order 8567 * they occur in the arrays. 8568 * 8569 * @static 8570 * @memberOf _ 8571 * @since 2.4.0 8572 * @category Array 8573 * @param {...Array} [arrays] The arrays to inspect. 8574 * @returns {Array} Returns the new array of filtered values. 8575 * @see _.difference, _.without 8576 * @example 8577 * 8578 * _.xor([2, 1], [2, 3]); 8579 * // => [1, 3] 8580 */ 8581 var xor = baseRest(function(arrays) { 8582 return baseXor(arrayFilter(arrays, isArrayLikeObject)); 8583 }); 8584 8585 /** 8586 * This method is like `_.xor` except that it accepts `iteratee` which is 8587 * invoked for each element of each `arrays` to generate the criterion by 8588 * which by which they're compared. The order of result values is determined 8589 * by the order they occur in the arrays. The iteratee is invoked with one 8590 * argument: (value). 8591 * 8592 * @static 8593 * @memberOf _ 8594 * @since 4.0.0 8595 * @category Array 8596 * @param {...Array} [arrays] The arrays to inspect. 8597 * @param {Function} [iteratee=_.identity] The iteratee invoked per element. 8598 * @returns {Array} Returns the new array of filtered values. 8599 * @example 8600 * 8601 * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor); 8602 * // => [1.2, 3.4] 8603 * 8604 * // The `_.property` iteratee shorthand. 8605 * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x'); 8606 * // => [{ 'x': 2 }] 8607 */ 8608 var xorBy = baseRest(function(arrays) { 8609 var iteratee = last(arrays); 8610 if (isArrayLikeObject(iteratee)) { 8611 iteratee = undefined; 8612 } 8613 return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2)); 8614 }); 8615 8616 /** 8617 * This method is like `_.xor` except that it accepts `comparator` which is 8618 * invoked to compare elements of `arrays`. The order of result values is 8619 * determined by the order they occur in the arrays. The comparator is invoked 8620 * with two arguments: (arrVal, othVal). 8621 * 8622 * @static 8623 * @memberOf _ 8624 * @since 4.0.0 8625 * @category Array 8626 * @param {...Array} [arrays] The arrays to inspect. 8627 * @param {Function} [comparator] The comparator invoked per element. 8628 * @returns {Array} Returns the new array of filtered values. 8629 * @example 8630 * 8631 * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]; 8632 * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }]; 8633 * 8634 * _.xorWith(objects, others, _.isEqual); 8635 * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }] 8636 */ 8637 var xorWith = baseRest(function(arrays) { 8638 var comparator = last(arrays); 8639 comparator = typeof comparator == 'function' ? comparator : undefined; 8640 return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined, comparator); 8641 }); 8642 8643 /** 8644 * Creates an array of grouped elements, the first of which contains the 8645 * first elements of the given arrays, the second of which contains the 8646 * second elements of the given arrays, and so on. 8647 * 8648 * @static 8649 * @memberOf _ 8650 * @since 0.1.0 8651 * @category Array 8652 * @param {...Array} [arrays] The arrays to process. 8653 * @returns {Array} Returns the new array of grouped elements. 8654 * @example 8655 * 8656 * _.zip(['a', 'b'], [1, 2], [true, false]); 8657 * // => [['a', 1, true], ['b', 2, false]] 8658 */ 8659 var zip =