/** * @license * lodash (Custom Build) * Build: `lodash include="isUndefined,isFunction,toArray,includes,union,each,isString,merge,isObject,set" exports="node"` * Copyright jQuery Foundation and other contributors * Released under MIT license * Based on Underscore.js 1.8.3 * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors */ ;(function() { /** Used as a safe reference for `undefined` in pre-ES5 environments. */ var undefined; /** Used as the semantic version number. */ var VERSION = '4.13.1'; /** Used as the size to enable large array optimizations. */ var LARGE_ARRAY_SIZE = 200; /** Used as the `TypeError` message for "Functions" methods. */ var FUNC_ERROR_TEXT = 'Expected a function'; /** Used to stand-in for `undefined` hash values. */ var HASH_UNDEFINED = '__lodash_hash_undefined__'; /** Used to compose bitmasks for comparison styles. */ var UNORDERED_COMPARE_FLAG = 1, PARTIAL_COMPARE_FLAG = 2; /** Used as references for various `Number` constants. */ var INFINITY = 1 / 0, MAX_SAFE_INTEGER = 9007199254740991, MAX_INTEGER = 1.7976931348623157e+308, NAN = 0 / 0; /** `Object#toString` result references. */ var argsTag = '[object Arguments]', arrayTag = '[object Array]', boolTag = '[object Boolean]', dateTag = '[object Date]', errorTag = '[object Error]', funcTag = '[object Function]', genTag = '[object GeneratorFunction]', mapTag = '[object Map]', numberTag = '[object Number]', objectTag = '[object Object]', promiseTag = '[object Promise]', regexpTag = '[object RegExp]', setTag = '[object Set]', stringTag = '[object String]', symbolTag = '[object Symbol]', weakMapTag = '[object WeakMap]'; var arrayBufferTag = '[object ArrayBuffer]', dataViewTag = '[object DataView]', float32Tag = '[object Float32Array]', float64Tag = '[object Float64Array]', int8Tag = '[object Int8Array]', int16Tag = '[object Int16Array]', int32Tag = '[object Int32Array]', uint8Tag = '[object Uint8Array]', uint8ClampedTag = '[object Uint8ClampedArray]', uint16Tag = '[object Uint16Array]', uint32Tag = '[object Uint32Array]'; /** Used to match property names within property paths. */ var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/, reIsPlainProp = /^\w*$/, rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(\.|\[\])(?:\4|$))/g; /** * Used to match `RegExp` * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns). */ var reRegExpChar = /[\\^$.*+?()[\]{}|]/g; /** Used to match leading and trailing whitespace. */ var reTrim = /^\s+|\s+$/g; /** Used to match backslashes in property paths. */ var reEscapeChar = /\\(\\)?/g; /** Used to match `RegExp` flags from their coerced string values. */ var reFlags = /\w*$/; /** Used to detect bad signed hexadecimal string values. */ var reIsBadHex = /^[-+]0x[0-9a-f]+$/i; /** Used to detect binary string values. */ var reIsBinary = /^0b[01]+$/i; /** Used to detect host constructors (Safari). */ var reIsHostCtor = /^\[object .+?Constructor\]$/; /** Used to detect octal string values. */ var reIsOctal = /^0o[0-7]+$/i; /** Used to detect unsigned integer values. */ var reIsUint = /^(?:0|[1-9]\d*)$/; /** Used to compose unicode character classes. */ var rsAstralRange = '\\ud800-\\udfff', rsComboMarksRange = '\\u0300-\\u036f\\ufe20-\\ufe23', rsComboSymbolsRange = '\\u20d0-\\u20f0', rsVarRange = '\\ufe0e\\ufe0f'; /** Used to compose unicode capture groups. */ var rsAstral = '[' + rsAstralRange + ']', rsCombo = '[' + rsComboMarksRange + rsComboSymbolsRange + ']', rsFitz = '\\ud83c[\\udffb-\\udfff]', rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')', rsNonAstral = '[^' + rsAstralRange + ']', rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}', rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]', rsZWJ = '\\u200d'; /** Used to compose unicode regexes. */ var reOptMod = rsModifier + '?', rsOptVar = '[' + rsVarRange + ']?', rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*', rsSeq = rsOptVar + reOptMod + rsOptJoin, rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')'; /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */ var reComplexSymbol = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g'); /** Used to identify `toStringTag` values of typed arrays. */ var typedArrayTags = {}; typedArrayTags[float32Tag] = typedArrayTags[float64Tag] = typedArrayTags[int8Tag] = typedArrayTags[int16Tag] = typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] = typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] = typedArrayTags[uint32Tag] = true; typedArrayTags[argsTag] = typedArrayTags[arrayTag] = typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] = typedArrayTags[dataViewTag] = typedArrayTags[dateTag] = typedArrayTags[errorTag] = typedArrayTags[funcTag] = typedArrayTags[mapTag] = typedArrayTags[numberTag] = typedArrayTags[objectTag] = typedArrayTags[regexpTag] = typedArrayTags[setTag] = typedArrayTags[stringTag] = typedArrayTags[weakMapTag] = false; /** Used to identify `toStringTag` values supported by `_.clone`. */ var cloneableTags = {}; cloneableTags[argsTag] = cloneableTags[arrayTag] = cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] = cloneableTags[boolTag] = cloneableTags[dateTag] = cloneableTags[float32Tag] = cloneableTags[float64Tag] = cloneableTags[int8Tag] = cloneableTags[int16Tag] = cloneableTags[int32Tag] = cloneableTags[mapTag] = cloneableTags[numberTag] = cloneableTags[objectTag] = cloneableTags[regexpTag] = cloneableTags[setTag] = cloneableTags[stringTag] = cloneableTags[symbolTag] = cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] = cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true; cloneableTags[errorTag] = cloneableTags[funcTag] = cloneableTags[weakMapTag] = false; /** Built-in method references without a dependency on `root`. */ var freeParseInt = parseInt; /** Detect free variable `exports`. */ var freeExports = typeof exports == 'object' && exports; /** Detect free variable `module`. */ var freeModule = freeExports && typeof module == 'object' && module; /** Detect the popular CommonJS extension `module.exports`. */ var moduleExports = freeModule && freeModule.exports === freeExports; /** Detect free variable `global` from Node.js. */ var freeGlobal = checkGlobal(typeof global == 'object' && global); /** Detect free variable `self`. */ var freeSelf = checkGlobal(typeof self == 'object' && self); /** Detect `this` as the global object. */ var thisGlobal = checkGlobal(typeof this == 'object' && this); /** Used as a reference to the global object. */ var root = freeGlobal || freeSelf || thisGlobal || Function('return this')(); /*--------------------------------------------------------------------------*/ /** * Adds the key-value `pair` to `map`. * * @private * @param {Object} map The map to modify. * @param {Array} pair The key-value pair to add. * @returns {Object} Returns `map`. */ function addMapEntry(map, pair) { // Don't return `Map#set` because it doesn't return the map instance in IE 11. map.set(pair[0], pair[1]); return map; } /** * Adds `value` to `set`. * * @private * @param {Object} set The set to modify. * @param {*} value The value to add. * @returns {Object} Returns `set`. */ function addSetEntry(set, value) { set.add(value); return set; } /** * A faster alternative to `Function#apply`, this function invokes `func` * with the `this` binding of `thisArg` and the arguments of `args`. * * @private * @param {Function} func The function to invoke. * @param {*} thisArg The `this` binding of `func`. * @param {Array} args The arguments to invoke `func` with. * @returns {*} Returns the result of `func`. */ function apply(func, thisArg, args) { var length = args.length; switch (length) { case 0: return func.call(thisArg); case 1: return func.call(thisArg, args[0]); case 2: return func.call(thisArg, args[0], args[1]); case 3: return func.call(thisArg, args[0], args[1], args[2]); } return func.apply(thisArg, args); } /** * A specialized version of `_.forEach` for arrays without support for * iteratee shorthands. * * @private * @param {Array} [array] The array to iterate over. * @param {Function} iteratee The function invoked per iteration. * @returns {Array} Returns `array`. */ function arrayEach(array, iteratee) { var index = -1, length = array ? array.length : 0; while (++index < length) { if (iteratee(array[index], index, array) === false) { break; } } return array; } /** * A specialized version of `_.includes` for arrays without support for * specifying an index to search from. * * @private * @param {Array} [array] The array to search. * @param {*} target The value to search for. * @returns {boolean} Returns `true` if `target` is found, else `false`. */ function arrayIncludes(array, value) { var length = array ? array.length : 0; return !!length && baseIndexOf(array, value, 0) > -1; } /** * This function is like `arrayIncludes` except that it accepts a comparator. * * @private * @param {Array} [array] The array to search. * @param {*} target The value to search for. * @param {Function} comparator The comparator invoked per element. * @returns {boolean} Returns `true` if `target` is found, else `false`. */ function arrayIncludesWith(array, value, comparator) { var index = -1, length = array ? array.length : 0; while (++index < length) { if (comparator(value, array[index])) { return true; } } return false; } /** * A specialized version of `_.map` for arrays without support for iteratee * shorthands. * * @private * @param {Array} [array] The array to iterate over. * @param {Function} iteratee The function invoked per iteration. * @returns {Array} Returns the new mapped array. */ function arrayMap(array, iteratee) { var index = -1, length = array ? array.length : 0, result = Array(length); while (++index < length) { result[index] = iteratee(array[index], index, array); } return result; } /** * Appends the elements of `values` to `array`. * * @private * @param {Array} array The array to modify. * @param {Array} values The values to append. * @returns {Array} Returns `array`. */ function arrayPush(array, values) { var index = -1, length = values.length, offset = array.length; while (++index < length) { array[offset + index] = values[index]; } return array; } /** * A specialized version of `_.reduce` for arrays without support for * iteratee shorthands. * * @private * @param {Array} [array] The array to iterate over. * @param {Function} iteratee The function invoked per iteration. * @param {*} [accumulator] The initial value. * @param {boolean} [initAccum] Specify using the first element of `array` as * the initial value. * @returns {*} Returns the accumulated value. */ function arrayReduce(array, iteratee, accumulator, initAccum) { var index = -1, length = array ? array.length : 0; if (initAccum && length) { accumulator = array[++index]; } while (++index < length) { accumulator = iteratee(accumulator, array[index], index, array); } return accumulator; } /** * A specialized version of `_.some` for arrays without support for iteratee * shorthands. * * @private * @param {Array} [array] The array to iterate over. * @param {Function} predicate The function invoked per iteration. * @returns {boolean} Returns `true` if any element passes the predicate check, * else `false`. */ function arraySome(array, predicate) { var index = -1, length = array ? array.length : 0; while (++index < length) { if (predicate(array[index], index, array)) { return true; } } return false; } /** * The base implementation of `_.indexOf` without `fromIndex` bounds checks. * * @private * @param {Array} array The array to search. * @param {*} value The value to search for. * @param {number} fromIndex The index to search from. * @returns {number} Returns the index of the matched value, else `-1`. */ function baseIndexOf(array, value, fromIndex) { if (value !== value) { return indexOfNaN(array, fromIndex); } var index = fromIndex - 1, length = array.length; while (++index < length) { if (array[index] === value) { return index; } } return -1; } /** * The base implementation of `_.times` without support for iteratee shorthands * or max array length checks. * * @private * @param {number} n The number of times to invoke `iteratee`. * @param {Function} iteratee The function invoked per iteration. * @returns {Array} Returns the array of results. */ function baseTimes(n, iteratee) { var index = -1, result = Array(n); while (++index < n) { result[index] = iteratee(index); } return result; } /** * The base implementation of `_.values` and `_.valuesIn` which creates an * array of `object` property values corresponding to the property names * of `props`. * * @private * @param {Object} object The object to query. * @param {Array} props The property names to get values for. * @returns {Object} Returns the array of property values. */ function baseValues(object, props) { return arrayMap(props, function(key) { return object[key]; }); } /** * Checks if a cache value for `key` exists. * * @private * @param {Object} cache The cache to query. * @param {string} key The key of the entry to check. * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`. */ function cacheHas(cache, key) { return cache.has(key); } /** * Checks if `value` is a global object. * * @private * @param {*} value The value to check. * @returns {null|Object} Returns `value` if it's a global object, else `null`. */ function checkGlobal(value) { return (value && value.Object === Object) ? value : null; } /** * Gets the value at `key` of `object`. * * @private * @param {Object} [object] The object to query. * @param {string} key The key of the property to get. * @returns {*} Returns the property value. */ function getValue(object, key) { return object == null ? undefined : object[key]; } /** * Gets the index at which the first occurrence of `NaN` is found in `array`. * * @private * @param {Array} array The array to search. * @param {number} fromIndex The index to search from. * @param {boolean} [fromRight] Specify iterating from right to left. * @returns {number} Returns the index of the matched `NaN`, else `-1`. */ function indexOfNaN(array, fromIndex, fromRight) { var length = array.length, index = fromIndex + (fromRight ? 1 : -1); while ((fromRight ? index-- : ++index < length)) { var other = array[index]; if (other !== other) { return index; } } return -1; } /** * Checks if `value` is a host object in IE < 9. * * @private * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is a host object, else `false`. */ function isHostObject(value) { // Many host objects are `Object` objects that can coerce to strings // despite having improperly defined `toString` methods. var result = false; if (value != null && typeof value.toString != 'function') { try { result = !!(value + ''); } catch (e) {} } return result; } /** * Converts `iterator` to an array. * * @private * @param {Object} iterator The iterator to convert. * @returns {Array} Returns the converted array. */ function iteratorToArray(iterator) { var data, result = []; while (!(data = iterator.next()).done) { result.push(data.value); } return result; } /** * Converts `map` to its key-value pairs. * * @private * @param {Object} map The map to convert. * @returns {Array} Returns the key-value pairs. */ function mapToArray(map) { var index = -1, result = Array(map.size); map.forEach(function(value, key) { result[++index] = [key, value]; }); return result; } /** * Converts `set` to an array of its values. * * @private * @param {Object} set The set to convert. * @returns {Array} Returns the values. */ function setToArray(set) { var index = -1, result = Array(set.size); set.forEach(function(value) { result[++index] = value; }); return result; } /** * Converts `string` to an array. * * @private * @param {string} string The string to convert. * @returns {Array} Returns the converted array. */ function stringToArray(string) { return string.match(reComplexSymbol); } /*--------------------------------------------------------------------------*/ /** Used for built-in method references. */ var arrayProto = Array.prototype, objectProto = Object.prototype; /** Used to detect overreaching core-js shims. */ var coreJsData = root['__core-js_shared__']; /** Used to detect methods masquerading as native. */ var maskSrcKey = (function() { var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || ''); return uid ? ('Symbol(src)_1.' + uid) : ''; }()); /** Used to resolve the decompiled source of functions. */ var funcToString = Function.prototype.toString; /** Used to check objects for own properties. */ var hasOwnProperty = objectProto.hasOwnProperty; /** Used to infer the `Object` constructor. */ var objectCtorString = funcToString.call(Object); /** * Used to resolve the * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring) * of values. */ var objectToString = objectProto.toString; /** Used to detect if a method is native. */ var reIsNative = RegExp('^' + funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&') .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$' ); /** Built-in value references. */ var Buffer = moduleExports ? root.Buffer : undefined, Reflect = root.Reflect, Symbol = root.Symbol, Uint8Array = root.Uint8Array, enumerate = Reflect ? Reflect.enumerate : undefined, getOwnPropertySymbols = Object.getOwnPropertySymbols, iteratorSymbol = typeof (iteratorSymbol = Symbol && Symbol.iterator) == 'symbol' ? iteratorSymbol : undefined, objectCreate = Object.create, propertyIsEnumerable = objectProto.propertyIsEnumerable, splice = arrayProto.splice; /* Built-in method references for those with the same name as other `lodash` methods. */ var nativeGetPrototype = Object.getPrototypeOf, nativeKeys = Object.keys, nativeMax = Math.max; /* Built-in method references that are verified to be native. */ var DataView = getNative(root, 'DataView'), Map = getNative(root, 'Map'), Promise = getNative(root, 'Promise'), Set = getNative(root, 'Set'), WeakMap = getNative(root, 'WeakMap'), nativeCreate = getNative(Object, 'create'); /** Used to lookup unminified function names. */ var realNames = {}; /** Used to detect maps, sets, and weakmaps. */ var dataViewCtorString = toSource(DataView), mapCtorString = toSource(Map), promiseCtorString = toSource(Promise), setCtorString = toSource(Set), weakMapCtorString = toSource(WeakMap); /** Used to convert symbols to primitives and strings. */ var symbolProto = Symbol ? Symbol.prototype : undefined, symbolValueOf = symbolProto ? symbolProto.valueOf : undefined, symbolToString = symbolProto ? symbolProto.toString : undefined; /*------------------------------------------------------------------------*/ /** * Creates a `lodash` object which wraps `value` to enable implicit method * chain sequences. Methods that operate on and return arrays, collections, * and functions can be chained together. Methods that retrieve a single value * or may return a primitive value will automatically end the chain sequence * and return the unwrapped value. Otherwise, the value must be unwrapped * with `_#value`. * * Explicit chain sequences, which must be unwrapped with `_#value`, may be * enabled using `_.chain`. * * The execution of chained methods is lazy, that is, it's deferred until * `_#value` is implicitly or explicitly called. * * Lazy evaluation allows several methods to support shortcut fusion. * Shortcut fusion is an optimization to merge iteratee calls; this avoids * the creation of intermediate arrays and can greatly reduce the number of * iteratee executions. Sections of a chain sequence qualify for shortcut * fusion if the section is applied to an array of at least `200` elements * and any iteratees accept only one argument. The heuristic for whether a * section qualifies for shortcut fusion is subject to change. * * Chaining is supported in custom builds as long as the `_#value` method is * directly or indirectly included in the build. * * In addition to lodash methods, wrappers have `Array` and `String` methods. * * The wrapper `Array` methods are: * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift` * * The wrapper `String` methods are: * `replace` and `split` * * The wrapper methods that support shortcut fusion are: * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`, * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`, * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray` * * The chainable wrapper methods are: * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`, * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`, * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`, * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`, * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`, * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`, * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`, * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`, * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`, * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`, * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`, * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`, * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`, * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`, * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`, * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`, * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`, * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`, * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`, * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`, * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`, * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`, * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`, * `zipObject`, `zipObjectDeep`, and `zipWith` * * The wrapper methods that are **not** chainable by default are: * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`, * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `deburr`, `divide`, `each`, * `eachRight`, `endsWith`, `eq`, `escape`, `escapeRegExp`, `every`, `find`, * `findIndex`, `findKey`, `findLast`, `findLastIndex`, `findLastKey`, `first`, * `floor`, `forEach`, `forEachRight`, `forIn`, `forInRight`, `forOwn`, * `forOwnRight`, `get`, `gt`, `gte`, `has`, `hasIn`, `head`, `identity`, * `includes`, `indexOf`, `inRange`, `invoke`, `isArguments`, `isArray`, * `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`, `isBoolean`, * `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`, `isEqualWith`, * `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`, `isMap`, * `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`, * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`, * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`, * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`, * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`, * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`, * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`, * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`, * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`, * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`, * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`, * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`, * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`, * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`, * `upperFirst`, `value`, and `words` * * @name _ * @constructor * @category Seq * @param {*} value The value to wrap in a `lodash` instance. * @returns {Object} Returns the new `lodash` wrapper instance. * @example * * function square(n) { * return n * n; * } * * var wrapped = _([1, 2, 3]); * * // Returns an unwrapped value. * wrapped.reduce(_.add); * // => 6 * * // Returns a wrapped value. * var squares = wrapped.map(square); * * _.isArray(squares); * // => false * * _.isArray(squares.value()); * // => true */ function lodash() { // No operation performed. } /*------------------------------------------------------------------------*/ /** * Creates a hash object. * * @private * @constructor * @param {Array} [entries] The key-value pairs to cache. */ function Hash(entries) { var index = -1, length = entries ? entries.length : 0; this.clear(); while (++index < length) { var entry = entries[index]; this.set(entry[0], entry[1]); } } /** * Removes all key-value entries from the hash. * * @private * @name clear * @memberOf Hash */ function hashClear() { this.__data__ = nativeCreate ? nativeCreate(null) : {}; } /** * Removes `key` and its value from the hash. * * @private * @name delete * @memberOf Hash * @param {Object} hash The hash to modify. * @param {string} key The key of the value to remove. * @returns {boolean} Returns `true` if the entry was removed, else `false`. */ function hashDelete(key) { return this.has(key) && delete this.__data__[key]; } /** * Gets the hash value for `key`. * * @private * @name get * @memberOf Hash * @param {string} key The key of the value to get. * @returns {*} Returns the entry value. */ function hashGet(key) { var data = this.__data__; if (nativeCreate) { var result = data[key]; return result === HASH_UNDEFINED ? undefined : result; } return hasOwnProperty.call(data, key) ? data[key] : undefined; } /** * Checks if a hash value for `key` exists. * * @private * @name has * @memberOf Hash * @param {string} key The key of the entry to check. * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`. */ function hashHas(key) { var data = this.__data__; return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key); } /** * Sets the hash `key` to `value`. * * @private * @name set * @memberOf Hash * @param {string} key The key of the value to set. * @param {*} value The value to set. * @returns {Object} Returns the hash instance. */ function hashSet(key, value) { var data = this.__data__; data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value; return this; } // Add methods to `Hash`. Hash.prototype.clear = hashClear; Hash.prototype['delete'] = hashDelete; Hash.prototype.get = hashGet; Hash.prototype.has = hashHas; Hash.prototype.set = hashSet; /*------------------------------------------------------------------------*/ /** * Creates an list cache object. * * @private * @constructor * @param {Array} [entries] The key-value pairs to cache. */ function ListCache(entries) { var index = -1, length = entries ? entries.length : 0; this.clear(); while (++index < length) { var entry = entries[index]; this.set(entry[0], entry[1]); } } /** * Removes all key-value entries from the list cache. * * @private * @name clear * @memberOf ListCache */ function listCacheClear() { this.__data__ = []; } /** * Removes `key` and its value from the list cache. * * @private * @name delete * @memberOf ListCache * @param {string} key The key of the value to remove. * @returns {boolean} Returns `true` if the entry was removed, else `false`. */ function listCacheDelete(key) { var data = this.__data__, index = assocIndexOf(data, key); if (index < 0) { return false; } var lastIndex = data.length - 1; if (index == lastIndex) { data.pop(); } else { splice.call(data, index, 1); } return true; } /** * Gets the list cache value for `key`. * * @private * @name get * @memberOf ListCache * @param {string} key The key of the value to get. * @returns {*} Returns the entry value. */ function listCacheGet(key) { var data = this.__data__, index = assocIndexOf(data, key); return index < 0 ? undefined : data[index][1]; } /** * Checks if a list cache value for `key` exists. * * @private * @name has * @memberOf ListCache * @param {string} key The key of the entry to check. * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`. */ function listCacheHas(key) { return assocIndexOf(this.__data__, key) > -1; } /** * Sets the list cache `key` to `value`. * * @private * @name set * @memberOf ListCache * @param {string} key The key of the value to set. * @param {*} value The value to set. * @returns {Object} Returns the list cache instance. */ function listCacheSet(key, value) { var data = this.__data__, index = assocIndexOf(data, key); if (index < 0) { data.push([key, value]); } else { data[index][1] = value; } return this; } // Add methods to `ListCache`. ListCache.prototype.clear = listCacheClear; ListCache.prototype['delete'] = listCacheDelete; ListCache.prototype.get = listCacheGet; ListCache.prototype.has = listCacheHas; ListCache.prototype.set = listCacheSet; /*------------------------------------------------------------------------*/ /** * Creates a map cache object to store key-value pairs. * * @private * @constructor * @param {Array} [entries] The key-value pairs to cache. */ function MapCache(entries) { var index = -1, length = entries ? entries.length : 0; this.clear(); while (++index < length) { var entry = entries[index]; this.set(entry[0], entry[1]); } } /** * Removes all key-value entries from the map. * * @private * @name clear * @memberOf MapCache */ function mapCacheClear() { this.__data__ = { 'hash': new Hash, 'map': new (Map || ListCache), 'string': new Hash }; } /** * Removes `key` and its value from the map. * * @private * @name delete * @memberOf MapCache * @param {string} key The key of the value to remove. * @returns {boolean} Returns `true` if the entry was removed, else `false`. */ function mapCacheDelete(key) { return getMapData(this, key)['delete'](key); } /** * Gets the map value for `key`. * * @private * @name get * @memberOf MapCache * @param {string} key The key of the value to get. * @returns {*} Returns the entry value. */ function mapCacheGet(key) { return getMapData(this, key).get(key); } /** * Checks if a map value for `key` exists. * * @private * @name has * @memberOf MapCache * @param {string} key The key of the entry to check. * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`. */ function mapCacheHas(key) { return getMapData(this, key).has(key); } /** * Sets the map `key` to `value`. * * @private * @name set * @memberOf MapCache * @param {string} key The key of the value to set. * @param {*} value The value to set. * @returns {Object} Returns the map cache instance. */ function mapCacheSet(key, value) { getMapData(this, key).set(key, value); return this; } // Add methods to `MapCache`. MapCache.prototype.clear = mapCacheClear; MapCache.prototype['delete'] = mapCacheDelete; MapCache.prototype.get = mapCacheGet; MapCache.prototype.has = mapCacheHas; MapCache.prototype.set = mapCacheSet; /*------------------------------------------------------------------------*/ /** * * Creates an array cache object to store unique values. * * @private * @constructor * @param {Array} [values] The values to cache. */ function SetCache(values) { var index = -1, length = values ? values.length : 0; this.__data__ = new MapCache; while (++index < length) { this.add(values[index]); } } /** * Adds `value` to the array cache. * * @private * @name add * @memberOf SetCache * @alias push * @param {*} value The value to cache. * @returns {Object} Returns the cache instance. */ function setCacheAdd(value) { this.__data__.set(value, HASH_UNDEFINED); return this; } /** * Checks if `value` is in the array cache. * * @private * @name has * @memberOf SetCache * @param {*} value The value to search for. * @returns {number} Returns `true` if `value` is found, else `false`. */ function setCacheHas(value) { return this.__data__.has(value); } // Add methods to `SetCache`. SetCache.prototype.add = SetCache.prototype.push = setCacheAdd; SetCache.prototype.has = setCacheHas; /*------------------------------------------------------------------------*/ /** * Creates a stack cache object to store key-value pairs. * * @private * @constructor * @param {Array} [entries] The key-value pairs to cache. */ function Stack(entries) { this.__data__ = new ListCache(entries); } /** * Removes all key-value entries from the stack. * * @private * @name clear * @memberOf Stack */ function stackClear() { this.__data__ = new ListCache; } /** * Removes `key` and its value from the stack. * * @private * @name delete * @memberOf Stack * @param {string} key The key of the value to remove. * @returns {boolean} Returns `true` if the entry was removed, else `false`. */ function stackDelete(key) { return this.__data__['delete'](key); } /** * Gets the stack value for `key`. * * @private * @name get * @memberOf Stack * @param {string} key The key of the value to get. * @returns {*} Returns the entry value. */ function stackGet(key) { return this.__data__.get(key); } /** * Checks if a stack value for `key` exists. * * @private * @name has * @memberOf Stack * @param {string} key The key of the entry to check. * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`. */ function stackHas(key) { return this.__data__.has(key); } /** * Sets the stack `key` to `value`. * * @private * @name set * @memberOf Stack * @param {string} key The key of the value to set. * @param {*} value The value to set. * @returns {Object} Returns the stack cache instance. */ function stackSet(key, value) { var cache = this.__data__; if (cache instanceof ListCache && cache.__data__.length == LARGE_ARRAY_SIZE) { cache = this.__data__ = new MapCache(cache.__data__); } cache.set(key, value); return this; } // Add methods to `Stack`. Stack.prototype.clear = stackClear; Stack.prototype['delete'] = stackDelete; Stack.prototype.get = stackGet; Stack.prototype.has = stackHas; Stack.prototype.set = stackSet; /*------------------------------------------------------------------------*/ /** * This function is like `assignValue` except that it doesn't assign * `undefined` values. * * @private * @param {Object} object The object to modify. * @param {string} key The key of the property to assign. * @param {*} value The value to assign. */ function assignMergeValue(object, key, value) { if ((value !== undefined && !eq(object[key], value)) || (typeof key == 'number' && value === undefined && !(key in object))) { object[key] = value; } } /** * Assigns `value` to `key` of `object` if the existing value is not equivalent * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero) * for equality comparisons. * * @private * @param {Object} object The object to modify. * @param {string} key The key of the property to assign. * @param {*} value The value to assign. */ function assignValue(object, key, value) { var objValue = object[key]; if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) || (value === undefined && !(key in object))) { object[key] = value; } } /** * Gets the index at which the `key` is found in `array` of key-value pairs. * * @private * @param {Array} array The array to search. * @param {*} key The key to search for. * @returns {number} Returns the index of the matched value, else `-1`. */ function assocIndexOf(array, key) { var length = array.length; while (length--) { if (eq(array[length][0], key)) { return length; } } return -1; } /** * The base implementation of `_.assign` without support for multiple sources * or `customizer` functions. * * @private * @param {Object} object The destination object. * @param {Object} source The source object. * @returns {Object} Returns `object`. */ function baseAssign(object, source) { return object && copyObject(source, keys(source), object); } /** * The base implementation of `_.clone` and `_.cloneDeep` which tracks * traversed objects. * * @private * @param {*} value The value to clone. * @param {boolean} [isDeep] Specify a deep clone. * @param {boolean} [isFull] Specify a clone including symbols. * @param {Function} [customizer] The function to customize cloning. * @param {string} [key] The key of `value`. * @param {Object} [object] The parent object of `value`. * @param {Object} [stack] Tracks traversed objects and their clone counterparts. * @returns {*} Returns the cloned value. */ function baseClone(value, isDeep, isFull, customizer, key, object, stack) { var result; if (customizer) { result = object ? customizer(value, key, object, stack) : customizer(value); } if (result !== undefined) { return result; } if (!isObject(value)) { return value; } var isArr = isArray(value); if (isArr) { result = initCloneArray(value); if (!isDeep) { return copyArray(value, result); } } else { var tag = getTag(value), isFunc = tag == funcTag || tag == genTag; if (isBuffer(value)) { return cloneBuffer(value, isDeep); } if (tag == objectTag || tag == argsTag || (isFunc && !object)) { if (isHostObject(value)) { return object ? value : {}; } result = initCloneObject(isFunc ? {} : value); if (!isDeep) { return copySymbols(value, baseAssign(result, value)); } } else { if (!cloneableTags[tag]) { return object ? value : {}; } result = initCloneByTag(value, tag, baseClone, isDeep); } } // Check for circular references and return its corresponding clone. stack || (stack = new Stack); var stacked = stack.get(value); if (stacked) { return stacked; } stack.set(value, result); if (!isArr) { var props = isFull ? getAllKeys(value) : keys(value); } // Recursively populate clone (susceptible to call stack limits). arrayEach(props || value, function(subValue, key) { if (props) { key = subValue; subValue = value[key]; } assignValue(result, key, baseClone(subValue, isDeep, isFull, customizer, key, value, stack)); }); return result; } /** * The base implementation of `_.create` without support for assigning * properties to the created object. * * @private * @param {Object} prototype The object to inherit from. * @returns {Object} Returns the new object. */ function baseCreate(proto) { return isObject(proto) ? objectCreate(proto) : {}; } /** * The base implementation of `_.forEach` without support for iteratee shorthands. * * @private * @param {Array|Object} collection The collection to iterate over. * @param {Function} iteratee The function invoked per iteration. * @returns {Array|Object} Returns `collection`. */ var baseEach = createBaseEach(baseForOwn); /** * The base implementation of `_.flatten` with support for restricting flattening. * * @private * @param {Array} array The array to flatten. * @param {number} depth The maximum recursion depth. * @param {boolean} [predicate=isFlattenable] The function invoked per iteration. * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks. * @param {Array} [result=[]] The initial result value. * @returns {Array} Returns the new flattened array. */ function baseFlatten(array, depth, predicate, isStrict, result) { var index = -1, length = array.length; predicate || (predicate = isFlattenable); result || (result = []); while (++index < length) { var value = array[index]; if (depth > 0 && predicate(value)) { if (depth > 1) { // Recursively flatten arrays (susceptible to call stack limits). baseFlatten(value, depth - 1, predicate, isStrict, result); } else { arrayPush(result, value); } } else if (!isStrict) { result[result.length] = value; } } return result; } /** * The base implementation of `baseForOwn` which iterates over `object` * properties returned by `keysFunc` and invokes `iteratee` for each property. * Iteratee functions may exit iteration early by explicitly returning `false`. * * @private * @param {Object} object The object to iterate over. * @param {Function} iteratee The function invoked per iteration. * @param {Function} keysFunc The function to get the keys of `object`. * @returns {Object} Returns `object`. */ var baseFor = createBaseFor(); /** * The base implementation of `_.forOwn` without support for iteratee shorthands. * * @private * @param {Object} object The object to iterate over. * @param {Function} iteratee The function invoked per iteration. * @returns {Object} Returns `object`. */ function baseForOwn(object, iteratee) { return object && baseFor(object, iteratee, keys); } /** * The base implementation of `_.get` without support for default values. * * @private * @param {Object} object The object to query. * @param {Array|string} path The path of the property to get. * @returns {*} Returns the resolved value. */ function baseGet(object, path) { path = isKey(path, object) ? [path] : castPath(path); var index = 0, length = path.length; while (object != null && index < length) { object = object[toKey(path[index++])]; } return (index && index == length) ? object : undefined; } /** * The base implementation of `getAllKeys` and `getAllKeysIn` which uses * `keysFunc` and `symbolsFunc` to get the enumerable property names and * symbols of `object`. * * @private * @param {Object} object The object to query. * @param {Function} keysFunc The function to get the keys of `object`. * @param {Function} symbolsFunc The function to get the symbols of `object`. * @returns {Array} Returns the array of property names and symbols. */ function baseGetAllKeys(object, keysFunc, symbolsFunc) { var result = keysFunc(object); return isArray(object) ? result : arrayPush(result, symbolsFunc(object)); } /** * The base implementation of `_.has` without support for deep paths. * * @private * @param {Object} [object] The object to query. * @param {Array|string} key The key to check. * @returns {boolean} Returns `true` if `key` exists, else `false`. */ function baseHas(object, key) { // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`, // that are composed entirely of index properties, return `false` for // `hasOwnProperty` checks of them. return object != null && (hasOwnProperty.call(object, key) || (typeof object == 'object' && key in object && getPrototype(object) === null)); } /** * The base implementation of `_.hasIn` without support for deep paths. * * @private * @param {Object} [object] The object to query. * @param {Array|string} key The key to check. * @returns {boolean} Returns `true` if `key` exists, else `false`. */ function baseHasIn(object, key) { return object != null && key in Object(object); } /** * The base implementation of `_.isEqual` which supports partial comparisons * and tracks traversed objects. * * @private * @param {*} value The value to compare. * @param {*} other The other value to compare. * @param {Function} [customizer] The function to customize comparisons. * @param {boolean} [bitmask] The bitmask of comparison flags. * The bitmask may be composed of the following flags: * 1 - Unordered comparison * 2 - Partial comparison * @param {Object} [stack] Tracks traversed `value` and `other` objects. * @returns {boolean} Returns `true` if the values are equivalent, else `false`. */ function baseIsEqual(value, other, customizer, bitmask, stack) { if (value === other) { return true; } if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) { return value !== value && other !== other; } return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack); } /** * A specialized version of `baseIsEqual` for arrays and objects which performs * deep comparisons and tracks traversed objects enabling objects with circular * references to be compared. * * @private * @param {Object} object The object to compare. * @param {Object} other The other object to compare. * @param {Function} equalFunc The function to determine equivalents of values. * @param {Function} [customizer] The function to customize comparisons. * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual` * for more details. * @param {Object} [stack] Tracks traversed `object` and `other` objects. * @returns {boolean} Returns `true` if the objects are equivalent, else `false`. */ function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) { var objIsArr = isArray(object), othIsArr = isArray(other), objTag = arrayTag, othTag = arrayTag; if (!objIsArr) { objTag = getTag(object); objTag = objTag == argsTag ? objectTag : objTag; } if (!othIsArr) { othTag = getTag(other); othTag = othTag == argsTag ? objectTag : othTag; } var objIsObj = objTag == objectTag && !isHostObject(object), othIsObj = othTag == objectTag && !isHostObject(other), isSameTag = objTag == othTag; if (isSameTag && !objIsObj) { stack || (stack = new Stack); return (objIsArr || isTypedArray(object)) ? equalArrays(object, other, equalFunc, customizer, bitmask, stack) : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack); } if (!(bitmask & PARTIAL_COMPARE_FLAG)) { var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'), othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__'); if (objIsWrapped || othIsWrapped) { var objUnwrapped = objIsWrapped ? object.value() : object, othUnwrapped = othIsWrapped ? other.value() : other; stack || (stack = new Stack); return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack); } } if (!isSameTag) { return false; } stack || (stack = new Stack); return equalObjects(object, other, equalFunc, customizer, bitmask, stack); } /** * The base implementation of `_.isMatch` without support for iteratee shorthands. * * @private * @param {Object} object The object to inspect. * @param {Object} source The object of property values to match. * @param {Array} matchData The property names, values, and compare flags to match. * @param {Function} [customizer] The function to customize comparisons. * @returns {boolean} Returns `true` if `object` is a match, else `false`. */ function baseIsMatch(object, source, matchData, customizer) { var index = matchData.length, length = index, noCustomizer = !customizer; if (object == null) { return !length; } object = Object(object); while (index--) { var data = matchData[index]; if ((noCustomizer && data[2]) ? data[1] !== object[data[0]] : !(data[0] in object) ) { return false; } } while (++index < length) { data = matchData[index]; var key = data[0], objValue = object[key], srcValue = data[1]; if (noCustomizer && data[2]) { if (objValue === undefined && !(key in object)) { return false; } } else { var stack = new Stack; if (customizer) { var result = customizer(objValue, srcValue, key, object, source, stack); } if (!(result === undefined ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack) : result )) { return false; } } } return true; } /** * The base implementation of `_.isNative` without bad shim checks. * * @private * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is a native function, * else `false`. */ function baseIsNative(value) { if (!isObject(value) || isMasked(value)) { return false; } var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor; return pattern.test(toSource(value)); } /** * The base implementation of `_.iteratee`. * * @private * @param {*} [value=_.identity] The value to convert to an iteratee. * @returns {Function} Returns the iteratee. */ function baseIteratee(value) { // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9. // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details. if (typeof value == 'function') { return value; } if (value == null) { return identity; } if (typeof value == 'object') { return isArray(value) ? baseMatchesProperty(value[0], value[1]) : baseMatches(value); } return property(value); } /** * The base implementation of `_.keys` which doesn't skip the constructor * property of prototypes or treat sparse arrays as dense. * * @private * @param {Object} object The object to query. * @returns {Array} Returns the array of property names. */ function baseKeys(object) { return nativeKeys(Object(object)); } /** * The base implementation of `_.keysIn` which doesn't skip the constructor * property of prototypes or treat sparse arrays as dense. * * @private * @param {Object} object The object to query. * @returns {Array} Returns the array of property names. */ function baseKeysIn(object) { object = object == null ? object : Object(object); var result = []; for (var key in object) { result.push(key); } return result; } // Fallback for IE < 9 with es6-shim. if (enumerate && !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf')) { baseKeysIn = function(object) { return iteratorToArray(enumerate(object)); }; } /** * The base implementation of `_.matches` which doesn't clone `source`. * * @private * @param {Object} source The object of property values to match. * @returns {Function} Returns the new spec function. */ function baseMatches(source) { var matchData = getMatchData(source); if (matchData.length == 1 && matchData[0][2]) { return matchesStrictComparable(matchData[0][0], matchData[0][1]); } return function(object) { return object === source || baseIsMatch(object, source, matchData); }; } /** * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`. * * @private * @param {string} path The path of the property to get. * @param {*} srcValue The value to match. * @returns {Function} Returns the new spec function. */ function baseMatchesProperty(path, srcValue) { if (isKey(path) && isStrictComparable(srcValue)) { return matchesStrictComparable(toKey(path), srcValue); } return function(object) { var objValue = get(object, path); return (objValue === undefined && objValue === srcValue) ? hasIn(object, path) : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG); }; } /** * The base implementation of `_.merge` without support for multiple sources. * * @private * @param {Object} object The destination object. * @param {Object} source The source object. * @param {number} srcIndex The index of `source`. * @param {Function} [customizer] The function to customize merged values. * @param {Object} [stack] Tracks traversed source values and their merged * counterparts. */ function baseMerge(object, source, srcIndex, customizer, stack) { if (object === source) { return; } if (!(isArray(source) || isTypedArray(source))) { var props = keysIn(source); } arrayEach(props || source, function(srcValue, key) { if (props) { key = srcValue; srcValue = source[key]; } if (isObject(srcValue)) { stack || (stack = new Stack); baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack); } else { var newValue = customizer ? customizer(object[key], srcValue, (key + ''), object, source, stack) : undefined; if (newValue === undefined) { newValue = srcValue; } assignMergeValue(object, key, newValue); } }); } /** * A specialized version of `baseMerge` for arrays and objects which performs * deep merges and tracks traversed objects enabling objects with circular * references to be merged. * * @private * @param {Object} object The destination object. * @param {Object} source The source object. * @param {string} key The key of the value to merge. * @param {number} srcIndex The index of `source`. * @param {Function} mergeFunc The function to merge values. * @param {Function} [customizer] The function to customize assigned values. * @param {Object} [stack] Tracks traversed source values and their merged * counterparts. */ function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) { var objValue = object[key], srcValue = source[key], stacked = stack.get(srcValue); if (stacked) { assignMergeValue(object, key, stacked); return; } var newValue = customizer ? customizer(objValue, srcValue, (key + ''), object, source, stack) : undefined; var isCommon = newValue === undefined; if (isCommon) { newValue = srcValue; if (isArray(srcValue) || isTypedArray(srcValue)) { if (isArray(objValue)) { newValue = objValue; } else if (isArrayLikeObject(objValue)) { newValue = copyArray(objValue); } else { isCommon = false; newValue = baseClone(srcValue, true); } } else if (isPlainObject(srcValue) || isArguments(srcValue)) { if (isArguments(objValue)) { newValue = toPlainObject(objValue); } else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) { isCommon = false; newValue = baseClone(srcValue, true); } else { newValue = objValue; } } else { isCommon = false; } } stack.set(srcValue, newValue); if (isCommon) { // Recursively merge objects and arrays (susceptible to call stack limits). mergeFunc(newValue, srcValue, srcIndex, customizer, stack); } stack['delete'](srcValue); assignMergeValue(object, key, newValue); } /** * The base implementation of `_.property` without support for deep paths. * * @private * @param {string} key The key of the property to get. * @returns {Function} Returns the new accessor function. */ function baseProperty(key) { return function(object) { return object == null ? undefined : object[key]; }; } /** * A specialized version of `baseProperty` which supports deep paths. * * @private * @param {Array|string} path The path of the property to get. * @returns {Function} Returns the new accessor function. */ function basePropertyDeep(path) { return function(object) { return baseGet(object, path); }; } /** * The base implementation of `_.set`. * * @private * @param {Object} object The object to query. * @param {Array|string} path The path of the property to set. * @param {*} value The value to set. * @param {Function} [customizer] The function to customize path creation. * @returns {Object} Returns `object`. */ function baseSet(object, path, value, customizer) { path = isKey(path, object) ? [path] : castPath(path); var index = -1, length = path.length, lastIndex = length - 1, nested = object; while (nested != null && ++index < length) { var key = toKey(path[index]); if (isObject(nested)) { var newValue = value; if (index != lastIndex) { var objValue = nested[key]; newValue = customizer ? customizer(objValue, key, nested) : undefined; if (newValue === undefined) { newValue = objValue == null ? (isIndex(path[index + 1]) ? [] : {}) : objValue; } } assignValue(nested, key, newValue); } nested = nested[key]; } return object; } /** * The base implementation of `_.toString` which doesn't convert nullish * values to empty strings. * * @private * @param {*} value The value to process. * @returns {string} Returns the string. */ function baseToString(value) { // Exit early for strings to avoid a performance hit in some environments. if (typeof value == 'string') { return value; } if (isSymbol(value)) { return symbolToString ? symbolToString.call(value) : ''; } var result = (value + ''); return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result; } /** * The base implementation of `_.uniqBy` without support for iteratee shorthands. * * @private * @param {Array} array The array to inspect. * @param {Function} [iteratee] The iteratee invoked per element. * @param {Function} [comparator] The comparator invoked per element. * @returns {Array} Returns the new duplicate free array. */ function baseUniq(array, iteratee, comparator) { var index = -1, includes = arrayIncludes, length = array.length, isCommon = true, result = [], seen = result; if (comparator) { isCommon = false; includes = arrayIncludesWith; } else if (length >= LARGE_ARRAY_SIZE) { var set = iteratee ? null : createSet(array); if (set) { return setToArray(set); } isCommon = false; includes = cacheHas; seen = new SetCache; } else { seen = iteratee ? [] : result; } outer: while (++index < length) { var value = array[index], computed = iteratee ? iteratee(value) : value; value = (comparator || value !== 0) ? value : 0; if (isCommon && computed === computed) { var seenIndex = seen.length; while (seenIndex--) { if (seen[seenIndex] === computed) { continue outer; } } if (iteratee) { seen.push(computed); } result.push(value); } else if (!includes(seen, computed, comparator)) { if (seen !== result) { seen.push(computed); } result.push(value); } } return result; } /** * Casts `value` to a path array if it's not one. * * @private * @param {*} value The value to inspect. * @returns {Array} Returns the cast property path array. */ function castPath(value) { return isArray(value) ? value : stringToPath(value); } /** * Creates a clone of `buffer`. * * @private * @param {Buffer} buffer The buffer to clone. * @param {boolean} [isDeep] Specify a deep clone. * @returns {Buffer} Returns the cloned buffer. */ function cloneBuffer(buffer, isDeep) { if (isDeep) { return buffer.slice(); } var result = new buffer.constructor(buffer.length); buffer.copy(result); return result; } /** * Creates a clone of `arrayBuffer`. * * @private * @param {ArrayBuffer} arrayBuffer The array buffer to clone. * @returns {ArrayBuffer} Returns the cloned array buffer. */ function cloneArrayBuffer(arrayBuffer) { var result = new arrayBuffer.constructor(arrayBuffer.byteLength); new Uint8Array(result).set(new Uint8Array(arrayBuffer)); return result; } /** * Creates a clone of `dataView`. * * @private * @param {Object} dataView The data view to clone. * @param {boolean} [isDeep] Specify a deep clone. * @returns {Object} Returns the cloned data view. */ function cloneDataView(dataView, isDeep) { var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer; return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength); } /** * Creates a clone of `map`. * * @private * @param {Object} map The map to clone. * @param {Function} cloneFunc The function to clone values. * @param {boolean} [isDeep] Specify a deep clone. * @returns {Object} Returns the cloned map. */ function cloneMap(map, isDeep, cloneFunc) { var array = isDeep ? cloneFunc(mapToArray(map), true) : mapToArray(map); return arrayReduce(array, addMapEntry, new map.constructor); } /** * Creates a clone of `regexp`. * * @private * @param {Object} regexp The regexp to clone. * @returns {Object} Returns the cloned regexp. */ function cloneRegExp(regexp) { var result = new regexp.constructor(regexp.source, reFlags.exec(regexp)); result.lastIndex = regexp.lastIndex; return result; } /** * Creates a clone of `set`. * * @private * @param {Object} set The set to clone. * @param {Function} cloneFunc The function to clone values. * @param {boolean} [isDeep] Specify a deep clone. * @returns {Object} Returns the cloned set. */ function cloneSet(set, isDeep, cloneFunc) { var array = isDeep ? cloneFunc(setToArray(set), true) : setToArray(set); return arrayReduce(array, addSetEntry, new set.constructor); } /** * Creates a clone of the `symbol` object. * * @private * @param {Object} symbol The symbol object to clone. * @returns {Object} Returns the cloned symbol object. */ function cloneSymbol(symbol) { return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {}; } /** * Creates a clone of `typedArray`. * * @private * @param {Object} typedArray The typed array to clone. * @param {boolean} [isDeep] Specify a deep clone. * @returns {Object} Returns the cloned typed array. */ function cloneTypedArray(typedArray, isDeep) { var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer; return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length); } /** * Copies the values of `source` to `array`. * * @private * @param {Array} source The array to copy values from. * @param {Array} [array=[]] The array to copy values to. * @returns {Array} Returns `array`. */ function copyArray(source, array) { var index = -1, length = source.length; array || (array = Array(length)); while (++index < length) { array[index] = source[index]; } return array; } /** * Copies properties of `source` to `object`. * * @private * @param {Object} source The object to copy properties from. * @param {Array} props The property identifiers to copy. * @param {Object} [object={}] The object to copy properties to. * @param {Function} [customizer] The function to customize copied values. * @returns {Object} Returns `object`. */ function copyObject(source, props, object, customizer) { object || (object = {}); var index = -1, length = props.length; while (++index < length) { var key = props[index]; var newValue = customizer ? customizer(object[key], source[key], key, object, source) : source[key]; assignValue(object, key, newValue); } return object; } /** * Copies own symbol properties of `source` to `object`. * * @private * @param {Object} source The object to copy symbols from. * @param {Object} [object={}] The object to copy symbols to. * @returns {Object} Returns `object`. */ function copySymbols(source, object) { return copyObject(source, getSymbols(source), object); } /** * Creates a function like `_.assign`. * * @private * @param {Function} assigner The function to assign values. * @returns {Function} Returns the new assigner function. */ function createAssigner(assigner) { return rest(function(object, sources) { var index = -1, length = sources.length, customizer = length > 1 ? sources[length - 1] : undefined, guard = length > 2 ? sources[2] : undefined; customizer = (assigner.length > 3 && typeof customizer == 'function') ? (length--, customizer) : undefined; if (guard && isIterateeCall(sources[0], sources[1], guard)) { customizer = length < 3 ? undefined : customizer; length = 1; } object = Object(object); while (++index < length) { var source = sources[index]; if (source) { assigner(object, source, index, customizer); } } return object; }); } /** * Creates a `baseEach` or `baseEachRight` function. * * @private * @param {Function} eachFunc The function to iterate over a collection. * @param {boolean} [fromRight] Specify iterating from right to left. * @returns {Function} Returns the new base function. */ function createBaseEach(eachFunc, fromRight) { return function(collection, iteratee) { if (collection == null) { return collection; } if (!isArrayLike(collection)) { return eachFunc(collection, iteratee); } var length = collection.length, index = fromRight ? length : -1, iterable = Object(collection); while ((fromRight ? index-- : ++index < length)) { if (iteratee(iterable[index], index, iterable) === false) { break; } } return collection; }; } /** * Creates a base function for methods like `_.forIn` and `_.forOwn`. * * @private * @param {boolean} [fromRight] Specify iterating from right to left. * @returns {Function} Returns the new base function. */ function createBaseFor(fromRight) { return function(object, iteratee, keysFunc) { var index = -1, iterable = Object(object), props = keysFunc(object), length = props.length; while (length--) { var key = props[fromRight ? length : ++index]; if (iteratee(iterable[key], key, iterable) === false) { break; } } return object; }; } /** * Creates a set of `values`. * * @private * @param {Array} values The values to add to the set. * @returns {Object} Returns the new set. */ var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) { return new Set(values); }; /** * A specialized version of `baseIsEqualDeep` for arrays with support for * partial deep comparisons. * * @private * @param {Array} array The array to compare. * @param {Array} other The other array to compare. * @param {Function} equalFunc The function to determine equivalents of values. * @param {Function} customizer The function to customize comparisons. * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual` * for more details. * @param {Object} stack Tracks traversed `array` and `other` objects. * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`. */ function equalArrays(array, other, equalFunc, customizer, bitmask, stack) { var isPartial = bitmask & PARTIAL_COMPARE_FLAG, arrLength = array.length, othLength = other.length; if (arrLength != othLength && !(isPartial && othLength > arrLength)) { return false; } // Assume cyclic values are equal. var stacked = stack.get(array); if (stacked) { return stacked == other; } var index = -1, result = true, seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined; stack.set(array, other); // Ignore non-index properties. while (++index < arrLength) { var arrValue = array[index], othValue = other[index]; if (customizer) { var compared = isPartial ? customizer(othValue, arrValue, index, other, array, stack) : customizer(arrValue, othValue, index, array, other, stack); } if (compared !== undefined) { if (compared) { continue; } result = false; break; } // Recursively compare arrays (susceptible to call stack limits). if (seen) { if (!arraySome(other, function(othValue, othIndex) { if (!seen.has(othIndex) && (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) { return seen.add(othIndex); } })) { result = false; break; } } else if (!( arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack) )) { result = false; break; } } stack['delete'](array); return result; } /** * A specialized version of `baseIsEqualDeep` for comparing objects of * the same `toStringTag`. * * **Note:** This function only supports comparing values with tags of * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`. * * @private * @param {Object} object The object to compare. * @param {Object} other The other object to compare. * @param {string} tag The `toStringTag` of the objects to compare. * @param {Function} equalFunc The function to determine equivalents of values. * @param {Function} customizer The function to customize comparisons. * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual` * for more details. * @param {Object} stack Tracks traversed `object` and `other` objects. * @returns {boolean} Returns `true` if the objects are equivalent, else `false`. */ function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) { switch (tag) { case dataViewTag: if ((object.byteLength != other.byteLength) || (object.byteOffset != other.byteOffset)) { return false; } object = object.buffer; other = other.buffer; case arrayBufferTag: if ((object.byteLength != other.byteLength) || !equalFunc(new Uint8Array(object), new Uint8Array(other))) { return false; } return true; case boolTag: case dateTag: // Coerce dates and booleans to numbers, dates to milliseconds and // booleans to `1` or `0` treating invalid dates coerced to `NaN` as // not equal. return +object == +other; case errorTag: return object.name == other.name && object.message == other.message; case numberTag: // Treat `NaN` vs. `NaN` as equal. return (object != +object) ? other != +other : object == +other; case regexpTag: case stringTag: // Coerce regexes to strings and treat strings, primitives and objects, // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring // for more details. return object == (other + ''); case mapTag: var convert = mapToArray; case setTag: var isPartial = bitmask & PARTIAL_COMPARE_FLAG; convert || (convert = setToArray); if (object.size != other.size && !isPartial) { return false; } // Assume cyclic values are equal. var stacked = stack.get(object); if (stacked) { return stacked == other; } bitmask |= UNORDERED_COMPARE_FLAG; stack.set(object, other); // Recursively compare objects (susceptible to call stack limits). return equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack); case symbolTag: if (symbolValueOf) { return symbolValueOf.call(object) == symbolValueOf.call(other); } } return false; } /** * A specialized version of `baseIsEqualDeep` for objects with support for * partial deep comparisons. * * @private * @param {Object} object The object to compare. * @param {Object} other The other object to compare. * @param {Function} equalFunc The function to determine equivalents of values. * @param {Function} customizer The function to customize comparisons. * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual` * for more details. * @param {Object} stack Tracks traversed `object` and `other` objects. * @returns {boolean} Returns `true` if the objects are equivalent, else `false`. */ function equalObjects(object, other, equalFunc, customizer, bitmask, stack) { var isPartial = bitmask & PARTIAL_COMPARE_FLAG, objProps = keys(object), objLength = objProps.length, othProps = keys(other), othLength = othProps.length; if (objLength != othLength && !isPartial) { return false; } var index = objLength; while (index--) { var key = objProps[index]; if (!(isPartial ? key in other : baseHas(other, key))) { return false; } } // Assume cyclic values are equal. var stacked = stack.get(object); if (stacked) { return stacked == other; } var result = true; stack.set(object, other); var skipCtor = isPartial; while (++index < objLength) { key = objProps[index]; var objValue = object[key], othValue = other[key]; if (customizer) { var compared = isPartial ? customizer(othValue, objValue, key, other, object, stack) : customizer(objValue, othValue, key, object, other, stack); } // Recursively compare objects (susceptible to call stack limits). if (!(compared === undefined ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack)) : compared )) { result = false; break; } skipCtor || (skipCtor = key == 'constructor'); } if (result && !skipCtor) { var objCtor = object.constructor, othCtor = other.constructor; // Non `Object` object instances with different constructors are not equal. if (objCtor != othCtor && ('constructor' in object && 'constructor' in other) && !(typeof objCtor == 'function' && objCtor instanceof objCtor && typeof othCtor == 'function' && othCtor instanceof othCtor)) { result = false; } } stack['delete'](object); return result; } /** * Creates an array of own enumerable property names and symbols of `object`. * * @private * @param {Object} object The object to query. * @returns {Array} Returns the array of property names and symbols. */ function getAllKeys(object) { return baseGetAllKeys(object, keys, getSymbols); } /** * Gets the appropriate "iteratee" function. If `_.iteratee` is customized, * this function returns the custom method, otherwise it returns `baseIteratee`. * If arguments are provided, the chosen function is invoked with them and * its result is returned. * * @private * @param {*} [value] The value to convert to an iteratee. * @param {number} [arity] The arity of the created iteratee. * @returns {Function} Returns the chosen function or its result. */ function getIteratee() { var result = lodash.iteratee || iteratee; result = result === iteratee ? baseIteratee : result; return arguments.length ? result(arguments[0], arguments[1]) : result; } /** * Gets the "length" property value of `object`. * * **Note:** This function is used to avoid a * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects * Safari on at least iOS 8.1-8.3 ARM64. * * @private * @param {Object} object The object to query. * @returns {*} Returns the "length" value. */ var getLength = baseProperty('length'); /** * Gets the data for `map`. * * @private * @param {Object} map The map to query. * @param {string} key The reference key. * @returns {*} Returns the map data. */ function getMapData(map, key) { var data = map.__data__; return isKeyable(key) ? data[typeof key == 'string' ? 'string' : 'hash'] : data.map; } /** * Gets the property names, values, and compare flags of `object`. * * @private * @param {Object} object The object to query. * @returns {Array} Returns the match data of `object`. */ function getMatchData(object) { var result = keys(object), length = result.length; while (length--) { var key = result[length], value = object[key]; result[length] = [key, value, isStrictComparable(value)]; } return result; } /** * Gets the native function at `key` of `object`. * * @private * @param {Object} object The object to query. * @param {string} key The key of the method to get. * @returns {*} Returns the function if it's native, else `undefined`. */ function getNative(object, key) { var value = getValue(object, key); return baseIsNative(value) ? value : undefined; } /** * Gets the `[[Prototype]]` of `value`. * * @private * @param {*} value The value to query. * @returns {null|Object} Returns the `[[Prototype]]`. */ function getPrototype(value) { return nativeGetPrototype(Object(value)); } /** * Creates an array of the own enumerable symbol properties of `object`. * * @private * @param {Object} object The object to query. * @returns {Array} Returns the array of symbols. */ function getSymbols(object) { // Coerce `object` to an object to avoid non-object errors in V8. // See https://bugs.chromium.org/p/v8/issues/detail?id=3443 for more details. return getOwnPropertySymbols(Object(object)); } // Fallback for IE < 11. if (!getOwnPropertySymbols) { getSymbols = stubArray; } /** * Gets the `toStringTag` of `value`. * * @private * @param {*} value The value to query. * @returns {string} Returns the `toStringTag`. */ function getTag(value) { return objectToString.call(value); } // Fallback for data views, maps, sets, and weak maps in IE 11, // for data views in Edge, and promises in Node.js. if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) || (Map && getTag(new Map) != mapTag) || (Promise && getTag(Promise.resolve()) != promiseTag) || (Set && getTag(new Set) != setTag) || (WeakMap && getTag(new WeakMap) != weakMapTag)) { getTag = function(value) { var result = objectToString.call(value), Ctor = result == objectTag ? value.constructor : undefined, ctorString = Ctor ? toSource(Ctor) : undefined; if (ctorString) { switch (ctorString) { case dataViewCtorString: return dataViewTag; case mapCtorString: return mapTag; case promiseCtorString: return promiseTag; case setCtorString: return setTag; case weakMapCtorString: return weakMapTag; } } return result; }; } /** * Checks if `path` exists on `object`. * * @private * @param {Object} object The object to query. * @param {Array|string} path The path to check. * @param {Function} hasFunc The function to check properties. * @returns {boolean} Returns `true` if `path` exists, else `false`. */ function hasPath(object, path, hasFunc) { path = isKey(path, object) ? [path] : castPath(path); var result, index = -1, length = path.length; while (++index < length) { var key = toKey(path[index]); if (!(result = object != null && hasFunc(object, key))) { break; } object = object[key]; } if (result) { return result; } var length = object ? object.length : 0; return !!length && isLength(length) && isIndex(key, length) && (isArray(object) || isString(object) || isArguments(object)); } /** * Initializes an array clone. * * @private * @param {Array} array The array to clone. * @returns {Array} Returns the initialized clone. */ function initCloneArray(array) { var length = array.length, result = array.constructor(length); // Add properties assigned by `RegExp#exec`. if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) { result.index = array.index; result.input = array.input; } return result; } /** * Initializes an object clone. * * @private * @param {Object} object The object to clone. * @returns {Object} Returns the initialized clone. */ function initCloneObject(object) { return (typeof object.constructor == 'function' && !isPrototype(object)) ? baseCreate(getPrototype(object)) : {}; } /** * Initializes an object clone based on its `toStringTag`. * * **Note:** This function only supports cloning values with tags of * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`. * * @private * @param {Object} object The object to clone. * @param {string} tag The `toStringTag` of the object to clone. * @param {Function} cloneFunc The function to clone values. * @param {boolean} [isDeep] Specify a deep clone. * @returns {Object} Returns the initialized clone. */ function initCloneByTag(object, tag, cloneFunc, isDeep) { var Ctor = object.constructor; switch (tag) { case arrayBufferTag: return cloneArrayBuffer(object); case boolTag: case dateTag: return new Ctor(+object); case dataViewTag: return cloneDataView(object, isDeep); case float32Tag: case float64Tag: case int8Tag: case int16Tag: case int32Tag: case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag: return cloneTypedArray(object, isDeep); case mapTag: return cloneMap(object, isDeep, cloneFunc); case numberTag: case stringTag: return new Ctor(object); case regexpTag: return cloneRegExp(object); case setTag: return cloneSet(object, isDeep, cloneFunc); case symbolTag: return cloneSymbol(object); } } /** * Creates an array of index keys for `object` values of arrays, * `arguments` objects, and strings, otherwise `null` is returned. * * @private * @param {Object} object The object to query. * @returns {Array|null} Returns index keys, else `null`. */ function indexKeys(object) { var length = object ? object.length : undefined; if (isLength(length) && (isArray(object) || isString(object) || isArguments(object))) { return baseTimes(length, String); } return null; } /** * Checks if `value` is a flattenable `arguments` object or array. * * @private * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is flattenable, else `false`. */ function isFlattenable(value) { return isArray(value) || isArguments(value); } /** * Checks if `value` is a valid array-like index. * * @private * @param {*} value The value to check. * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index. * @returns {boolean} Returns `true` if `value` is a valid index, else `false`. */ function isIndex(value, length) { length = length == null ? MAX_SAFE_INTEGER : length; return !!length && (typeof value == 'number' || reIsUint.test(value)) && (value > -1 && value % 1 == 0 && value < length); } /** * Checks if the given arguments are from an iteratee call. * * @private * @param {*} value The potential iteratee value argument. * @param {*} index The potential iteratee index or key argument. * @param {*} object The potential iteratee object argument. * @returns {boolean} Returns `true` if the arguments are from an iteratee call, * else `false`. */ function isIterateeCall(value, index, object) { if (!isObject(object)) { return false; } var type = typeof index; if (type == 'number' ? (isArrayLike(object) && isIndex(index, object.length)) : (type == 'string' && index in object) ) { return eq(object[index], value); } return false; } /** * Checks if `value` is a property name and not a property path. * * @private * @param {*} value The value to check. * @param {Object} [object] The object to query keys on. * @returns {boolean} Returns `true` if `value` is a property name, else `false`. */ function isKey(value, object) { if (isArray(value)) { return false; } var type = typeof value; if (type == 'number' || type == 'symbol' || type == 'boolean' || value == null || isSymbol(value)) { return true; } return reIsPlainProp.test(value) || !reIsDeepProp.test(value) || (object != null && value in Object(object)); } /** * Checks if `value` is suitable for use as unique object key. * * @private * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is suitable, else `false`. */ function isKeyable(value) { var type = typeof value; return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean') ? (value !== '__proto__') : (value === null); } /** * Checks if `func` has its source masked. * * @private * @param {Function} func The function to check. * @returns {boolean} Returns `true` if `func` is masked, else `false`. */ function isMasked(func) { return !!maskSrcKey && (maskSrcKey in func); } /** * Checks if `value` is likely a prototype object. * * @private * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is a prototype, else `false`. */ function isPrototype(value) { var Ctor = value && value.constructor, proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto; return value === proto; } /** * Checks if `value` is suitable for strict equality comparisons, i.e. `===`. * * @private * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` if suitable for strict * equality comparisons, else `false`. */ function isStrictComparable(value) { return value === value && !isObject(value); } /** * A specialized version of `matchesProperty` for source values suitable * for strict equality comparisons, i.e. `===`. * * @private * @param {string} key The key of the property to get. * @param {*} srcValue The value to match. * @returns {Function} Returns the new spec function. */ function matchesStrictComparable(key, srcValue) { return function(object) { if (object == null) { return false; } return object[key] === srcValue && (srcValue !== undefined || (key in Object(object))); }; } /** * Converts `string` to a property path array. * * @private * @param {string} string The string to convert. * @returns {Array} Returns the property path array. */ var stringToPath = memoize(function(string) { var result = []; toString(string).replace(rePropName, function(match, number, quote, string) { result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match)); }); return result; }); /** * Converts `value` to a string key if it's not a string or symbol. * * @private * @param {*} value The value to inspect. * @returns {string|symbol} Returns the key. */ function toKey(value) { if (typeof value == 'string' || isSymbol(value)) { return value; } var result = (value + ''); return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result; } /** * Converts `func` to its source code. * * @private * @param {Function} func The function to process. * @returns {string} Returns the source code. */ function toSource(func) { if (func != null) { try { return funcToString.call(func); } catch (e) {} try { return (func + ''); } catch (e) {} } return ''; } /*------------------------------------------------------------------------*/ /** * Creates an array of unique values, in order, from all given arrays using * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero) * for equality comparisons. * * @static * @memberOf _ * @since 0.1.0 * @category Array * @param {...Array} [arrays] The arrays to inspect. * @returns {Array} Returns the new array of combined values. * @example * * _.union([2], [1, 2]); * // => [2, 1] */ var union = rest(function(arrays) { return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true)); }); /*------------------------------------------------------------------------*/ /** * Iterates over elements of `collection` and invokes `iteratee` for each element. * The iteratee is invoked with three arguments: (value, index|key, collection). * Iteratee functions may exit iteration early by explicitly returning `false`. * * **Note:** As with other "Collections" methods, objects with a "length" * property are iterated like arrays. To avoid this behavior use `_.forIn` * or `_.forOwn` for object iteration. * * @static * @memberOf _ * @since 0.1.0 * @alias each * @category Collection * @param {Array|Object} collection The collection to iterate over. * @param {Function} [iteratee=_.identity] The function invoked per iteration. * @returns {Array|Object} Returns `collection`. * @see _.forEachRight * @example * * _([1, 2]).forEach(function(value) { * console.log(value); * }); * // => Logs `1` then `2`. * * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) { * console.log(key); * }); * // => Logs 'a' then 'b' (iteration order is not guaranteed). */ function forEach(collection, iteratee) { var func = isArray(collection) ? arrayEach : baseEach; return func(collection, getIteratee(iteratee, 3)); } /** * Checks if `value` is in `collection`. If `collection` is a string, it's * checked for a substring of `value`, otherwise * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero) * is used for equality comparisons. If `fromIndex` is negative, it's used as * the offset from the end of `collection`. * * @static * @memberOf _ * @since 0.1.0 * @category Collection * @param {Array|Object|string} collection The collection to search. * @param {*} value The value to search for. * @param {number} [fromIndex=0] The index to search from. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`. * @returns {boolean} Returns `true` if `value` is found, else `false`. * @example * * _.includes([1, 2, 3], 1); * // => true * * _.includes([1, 2, 3], 1, 2); * // => false * * _.includes({ 'user': 'fred', 'age': 40 }, 'fred'); * // => true * * _.includes('pebbles', 'eb'); * // => true */ function includes(collection, value, fromIndex, guard) { collection = isArrayLike(collection) ? collection : values(collection); fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0; var length = collection.length; if (fromIndex < 0) { fromIndex = nativeMax(length + fromIndex, 0); } return isString(collection) ? (fromIndex <= length && collection.indexOf(value, fromIndex) > -1) : (!!length && baseIndexOf(collection, value, fromIndex) > -1); } /*------------------------------------------------------------------------*/ /** * Creates a function that memoizes the result of `func`. If `resolver` is * provided, it determines the cache key for storing the result based on the * arguments provided to the memoized function. By default, the first argument * provided to the memoized function is used as the map cache key. The `func` * is invoked with the `this` binding of the memoized function. * * **Note:** The cache is exposed as the `cache` property on the memoized * function. Its creation may be customized by replacing the `_.memoize.Cache` * constructor with one whose instances implement the * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object) * method interface of `delete`, `get`, `has`, and `set`. * * @static * @memberOf _ * @since 0.1.0 * @category Function * @param {Function} func The function to have its output memoized. * @param {Function} [resolver] The function to resolve the cache key. * @returns {Function} Returns the new memoized function. * @example * * var object = { 'a': 1, 'b': 2 }; * var other = { 'c': 3, 'd': 4 }; * * var values = _.memoize(_.values); * values(object); * // => [1, 2] * * values(other); * // => [3, 4] * * object.a = 2; * values(object); * // => [1, 2] * * // Modify the result cache. * values.cache.set(object, ['a', 'b']); * values(object); * // => ['a', 'b'] * * // Replace `_.memoize.Cache`. * _.memoize.Cache = WeakMap; */ function memoize(func, resolver) { if (typeof func != 'function' || (resolver && typeof resolver != 'function')) { throw new TypeError(FUNC_ERROR_TEXT); } var memoized = function() { var args = arguments, key = resolver ? resolver.apply(this, args) : args[0], cache = memoized.cache; if (cache.has(key)) { return cache.get(key); } var result = func.apply(this, args); memoized.cache = cache.set(key, result); return result; }; memoized.cache = new (memoize.Cache || MapCache); return memoized; } // Assign cache to `_.memoize`. memoize.Cache = MapCache; /** * Creates a function that invokes `func` with the `this` binding of the * created function and arguments from `start` and beyond provided as * an array. * * **Note:** This method is based on the * [rest parameter](https://mdn.io/rest_parameters). * * @static * @memberOf _ * @since 4.0.0 * @category Function * @param {Function} func The function to apply a rest parameter to. * @param {number} [start=func.length-1] The start position of the rest parameter. * @returns {Function} Returns the new function. * @example * * var say = _.rest(function(what, names) { * return what + ' ' + _.initial(names).join(', ') + * (_.size(names) > 1 ? ', & ' : '') + _.last(names); * }); * * say('hello', 'fred', 'barney', 'pebbles'); * // => 'hello fred, barney, & pebbles' */ function rest(func, start) { if (typeof func != 'function') { throw new TypeError(FUNC_ERROR_TEXT); } start = nativeMax(start === undefined ? (func.length - 1) : toInteger(start), 0); return function() { var args = arguments, index = -1, length = nativeMax(args.length - start, 0), array = Array(length); while (++index < length) { array[index] = args[start + index]; } switch (start) { case 0: return func.call(this, array); case 1: return func.call(this, args[0], array); case 2: return func.call(this, args[0], args[1], array); } var otherArgs = Array(start + 1); index = -1; while (++index < start) { otherArgs[index] = args[index]; } otherArgs[start] = array; return apply(func, this, otherArgs); }; } /*------------------------------------------------------------------------*/ /** * Performs a * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero) * comparison between two values to determine if they are equivalent. * * @static * @memberOf _ * @since 4.0.0 * @category Lang * @param {*} value The value to compare. * @param {*} other The other value to compare. * @returns {boolean} Returns `true` if the values are equivalent, else `false`. * @example * * var object = { 'user': 'fred' }; * var other = { 'user': 'fred' }; * * _.eq(object, object); * // => true * * _.eq(object, other); * // => false * * _.eq('a', 'a'); * // => true * * _.eq('a', Object('a')); * // => false * * _.eq(NaN, NaN); * // => true */ function eq(value, other) { return value === other || (value !== value && other !== other); } /** * Checks if `value` is likely an `arguments` object. * * @static * @memberOf _ * @since 0.1.0 * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is correctly classified, * else `false`. * @example * * _.isArguments(function() { return arguments; }()); * // => true * * _.isArguments([1, 2, 3]); * // => false */ function isArguments(value) { // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode. return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') && (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag); } /** * Checks if `value` is classified as an `Array` object. * * @static * @memberOf _ * @since 0.1.0 * @type {Function} * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is correctly classified, * else `false`. * @example * * _.isArray([1, 2, 3]); * // => true * * _.isArray(document.body.children); * // => false * * _.isArray('abc'); * // => false * * _.isArray(_.noop); * // => false */ var isArray = Array.isArray; /** * Checks if `value` is array-like. A value is considered array-like if it's * not a function and has a `value.length` that's an integer greater than or * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`. * * @static * @memberOf _ * @since 4.0.0 * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is array-like, else `false`. * @example * * _.isArrayLike([1, 2, 3]); * // => true * * _.isArrayLike(document.body.children); * // => true * * _.isArrayLike('abc'); * // => true * * _.isArrayLike(_.noop); * // => false */ function isArrayLike(value) { return value != null && isLength(getLength(value)) && !isFunction(value); } /** * This method is like `_.isArrayLike` except that it also checks if `value` * is an object. * * @static * @memberOf _ * @since 4.0.0 * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is an array-like object, * else `false`. * @example * * _.isArrayLikeObject([1, 2, 3]); * // => true * * _.isArrayLikeObject(document.body.children); * // => true * * _.isArrayLikeObject('abc'); * // => false * * _.isArrayLikeObject(_.noop); * // => false */ function isArrayLikeObject(value) { return isObjectLike(value) && isArrayLike(value); } /** * Checks if `value` is a buffer. * * @static * @memberOf _ * @since 4.3.0 * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is a buffer, else `false`. * @example * * _.isBuffer(new Buffer(2)); * // => true * * _.isBuffer(new Uint8Array(2)); * // => false */ var isBuffer = !Buffer ? stubFalse : function(value) { return value instanceof Buffer; }; /** * Checks if `value` is classified as a `Function` object. * * @static * @memberOf _ * @since 0.1.0 * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is correctly classified, * else `false`. * @example * * _.isFunction(_); * // => true * * _.isFunction(/abc/); * // => false */ function isFunction(value) { // The use of `Object#toString` avoids issues with the `typeof` operator // in Safari 8 which returns 'object' for typed array and weak map constructors, // and PhantomJS 1.9 which returns 'function' for `NodeList` instances. var tag = isObject(value) ? objectToString.call(value) : ''; return tag == funcTag || tag == genTag; } /** * Checks if `value` is a valid array-like length. * * **Note:** This function is loosely based on * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength). * * @static * @memberOf _ * @since 4.0.0 * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is a valid length, * else `false`. * @example * * _.isLength(3); * // => true * * _.isLength(Number.MIN_VALUE); * // => false * * _.isLength(Infinity); * // => false * * _.isLength('3'); * // => false */ function isLength(value) { return typeof value == 'number' && value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER; } /** * Checks if `value` is the * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types) * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`) * * @static * @memberOf _ * @since 0.1.0 * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is an object, else `false`. * @example * * _.isObject({}); * // => true * * _.isObject([1, 2, 3]); * // => true * * _.isObject(_.noop); * // => true * * _.isObject(null); * // => false */ function isObject(value) { var type = typeof value; return !!value && (type == 'object' || type == 'function'); } /** * Checks if `value` is object-like. A value is object-like if it's not `null` * and has a `typeof` result of "object". * * @static * @memberOf _ * @since 4.0.0 * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is object-like, else `false`. * @example * * _.isObjectLike({}); * // => true * * _.isObjectLike([1, 2, 3]); * // => true * * _.isObjectLike(_.noop); * // => false * * _.isObjectLike(null); * // => false */ function isObjectLike(value) { return !!value && typeof value == 'object'; } /** * Checks if `value` is a plain object, that is, an object created by the * `Object` constructor or one with a `[[Prototype]]` of `null`. * * @static * @memberOf _ * @since 0.8.0 * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is a plain object, * else `false`. * @example * * function Foo() { * this.a = 1; * } * * _.isPlainObject(new Foo); * // => false * * _.isPlainObject([1, 2, 3]); * // => false * * _.isPlainObject({ 'x': 0, 'y': 0 }); * // => true * * _.isPlainObject(Object.create(null)); * // => true */ function isPlainObject(value) { if (!isObjectLike(value) || objectToString.call(value) != objectTag || isHostObject(value)) { return false; } var proto = getPrototype(value); if (proto === null) { return true; } var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor; return (typeof Ctor == 'function' && Ctor instanceof Ctor && funcToString.call(Ctor) == objectCtorString); } /** * Checks if `value` is classified as a `String` primitive or object. * * @static * @since 0.1.0 * @memberOf _ * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is correctly classified, * else `false`. * @example * * _.isString('abc'); * // => true * * _.isString(1); * // => false */ function isString(value) { return typeof value == 'string' || (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag); } /** * Checks if `value` is classified as a `Symbol` primitive or object. * * @static * @memberOf _ * @since 4.0.0 * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is correctly classified, * else `false`. * @example * * _.isSymbol(Symbol.iterator); * // => true * * _.isSymbol('abc'); * // => false */ function isSymbol(value) { return typeof value == 'symbol' || (isObjectLike(value) && objectToString.call(value) == symbolTag); } /** * Checks if `value` is classified as a typed array. * * @static * @memberOf _ * @since 3.0.0 * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is correctly classified, * else `false`. * @example * * _.isTypedArray(new Uint8Array); * // => true * * _.isTypedArray([]); * // => false */ function isTypedArray(value) { return isObjectLike(value) && isLength(value.length) && !!typedArrayTags[objectToString.call(value)]; } /** * Checks if `value` is `undefined`. * * @static * @since 0.1.0 * @memberOf _ * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`. * @example * * _.isUndefined(void 0); * // => true * * _.isUndefined(null); * // => false */ function isUndefined(value) { return value === undefined; } /** * Converts `value` to an array. * * @static * @since 0.1.0 * @memberOf _ * @category Lang * @param {*} value The value to convert. * @returns {Array} Returns the converted array. * @example * * _.toArray({ 'a': 1, 'b': 2 }); * // => [1, 2] * * _.toArray('abc'); * // => ['a', 'b', 'c'] * * _.toArray(1); * // => [] * * _.toArray(null); * // => [] */ function toArray(value) { if (!value) { return []; } if (isArrayLike(value)) { return isString(value) ? stringToArray(value) : copyArray(value); } if (iteratorSymbol && value[iteratorSymbol]) { return iteratorToArray(value[iteratorSymbol]()); } var tag = getTag(value), func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values); return func(value); } /** * Converts `value` to a finite number. * * @static * @memberOf _ * @since 4.12.0 * @category Lang * @param {*} value The value to convert. * @returns {number} Returns the converted number. * @example * * _.toFinite(3.2); * // => 3.2 * * _.toFinite(Number.MIN_VALUE); * // => 5e-324 * * _.toFinite(Infinity); * // => 1.7976931348623157e+308 * * _.toFinite('3.2'); * // => 3.2 */ function toFinite(value) { if (!value) { return value === 0 ? value : 0; } value = toNumber(value); if (value === INFINITY || value === -INFINITY) { var sign = (value < 0 ? -1 : 1); return sign * MAX_INTEGER; } return value === value ? value : 0; } /** * Converts `value` to an integer. * * **Note:** This method is loosely based on * [`ToInteger`](http://www.ecma-international.org/ecma-262/6.0/#sec-tointeger). * * @static * @memberOf _ * @since 4.0.0 * @category Lang * @param {*} value The value to convert. * @returns {number} Returns the converted integer. * @example * * _.toInteger(3.2); * // => 3 * * _.toInteger(Number.MIN_VALUE); * // => 0 * * _.toInteger(Infinity); * // => 1.7976931348623157e+308 * * _.toInteger('3.2'); * // => 3 */ function toInteger(value) { var result = toFinite(value), remainder = result % 1; return result === result ? (remainder ? result - remainder : result) : 0; } /** * Converts `value` to a number. * * @static * @memberOf _ * @since 4.0.0 * @category Lang * @param {*} value The value to process. * @returns {number} Returns the number. * @example * * _.toNumber(3.2); * // => 3.2 * * _.toNumber(Number.MIN_VALUE); * // => 5e-324 * * _.toNumber(Infinity); * // => Infinity * * _.toNumber('3.2'); * // => 3.2 */ function toNumber(value) { if (typeof value == 'number') { return value; } if (isSymbol(value)) { return NAN; } if (isObject(value)) { var other = isFunction(value.valueOf) ? value.valueOf() : value; value = isObject(other) ? (other + '') : other; } if (typeof value != 'string') { return value === 0 ? value : +value; } value = value.replace(reTrim, ''); var isBinary = reIsBinary.test(value); return (isBinary || reIsOctal.test(value)) ? freeParseInt(value.slice(2), isBinary ? 2 : 8) : (reIsBadHex.test(value) ? NAN : +value); } /** * Converts `value` to a plain object flattening inherited enumerable string * keyed properties of `value` to own properties of the plain object. * * @static * @memberOf _ * @since 3.0.0 * @category Lang * @param {*} value The value to convert. * @returns {Object} Returns the converted plain object. * @example * * function Foo() { * this.b = 2; * } * * Foo.prototype.c = 3; * * _.assign({ 'a': 1 }, new Foo); * // => { 'a': 1, 'b': 2 } * * _.assign({ 'a': 1 }, _.toPlainObject(new Foo)); * // => { 'a': 1, 'b': 2, 'c': 3 } */ function toPlainObject(value) { return copyObject(value, keysIn(value)); } /** * Converts `value` to a string. An empty string is returned for `null` * and `undefined` values. The sign of `-0` is preserved. * * @static * @memberOf _ * @since 4.0.0 * @category Lang * @param {*} value The value to process. * @returns {string} Returns the string. * @example * * _.toString(null); * // => '' * * _.toString(-0); * // => '-0' * * _.toString([1, 2, 3]); * // => '1,2,3' */ function toString(value) { return value == null ? '' : baseToString(value); } /*------------------------------------------------------------------------*/ /** * Gets the value at `path` of `object`. If the resolved value is * `undefined`, the `defaultValue` is used in its place. * * @static * @memberOf _ * @since 3.7.0 * @category Object * @param {Object} object The object to query. * @param {Array|string} path The path of the property to get. * @param {*} [defaultValue] The value returned for `undefined` resolved values. * @returns {*} Returns the resolved value. * @example * * var object = { 'a': [{ 'b': { 'c': 3 } }] }; * * _.get(object, 'a[0].b.c'); * // => 3 * * _.get(object, ['a', '0', 'b', 'c']); * // => 3 * * _.get(object, 'a.b.c', 'default'); * // => 'default' */ function get(object, path, defaultValue) { var result = object == null ? undefined : baseGet(object, path); return result === undefined ? defaultValue : result; } /** * Checks if `path` is a direct or inherited property of `object`. * * @static * @memberOf _ * @since 4.0.0 * @category Object * @param {Object} object The object to query. * @param {Array|string} path The path to check. * @returns {boolean} Returns `true` if `path` exists, else `false`. * @example * * var object = _.create({ 'a': _.create({ 'b': 2 }) }); * * _.hasIn(object, 'a'); * // => true * * _.hasIn(object, 'a.b'); * // => true * * _.hasIn(object, ['a', 'b']); * // => true * * _.hasIn(object, 'b'); * // => false */ function hasIn(object, path) { return object != null && hasPath(object, path, baseHasIn); } /** * Creates an array of the own enumerable property names of `object`. * * **Note:** Non-object values are coerced to objects. See the * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys) * for more details. * * @static * @since 0.1.0 * @memberOf _ * @category Object * @param {Object} object The object to query. * @returns {Array} Returns the array of property names. * @example * * function Foo() { * this.a = 1; * this.b = 2; * } * * Foo.prototype.c = 3; * * _.keys(new Foo); * // => ['a', 'b'] (iteration order is not guaranteed) * * _.keys('hi'); * // => ['0', '1'] */ function keys(object) { var isProto = isPrototype(object); if (!(isProto || isArrayLike(object))) { return baseKeys(object); } var indexes = indexKeys(object), skipIndexes = !!indexes, result = indexes || [], length = result.length; for (var key in object) { if (baseHas(object, key) && !(skipIndexes && (key == 'length' || isIndex(key, length))) && !(isProto && key == 'constructor')) { result.push(key); } } return result; } /** * Creates an array of the own and inherited enumerable property names of `object`. * * **Note:** Non-object values are coerced to objects. * * @static * @memberOf _ * @since 3.0.0 * @category Object * @param {Object} object The object to query. * @returns {Array} Returns the array of property names. * @example * * function Foo() { * this.a = 1; * this.b = 2; * } * * Foo.prototype.c = 3; * * _.keysIn(new Foo); * // => ['a', 'b', 'c'] (iteration order is not guaranteed) */ function keysIn(object) { var index = -1, isProto = isPrototype(object), props = baseKeysIn(object), propsLength = props.length, indexes = indexKeys(object), skipIndexes = !!indexes, result = indexes || [], length = result.length; while (++index < propsLength) { var key = props[index]; if (!(skipIndexes && (key == 'length' || isIndex(key, length))) && !(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) { result.push(key); } } return result; } /** * This method is like `_.assign` except that it recursively merges own and * inherited enumerable string keyed properties of source objects into the * destination object. Source properties that resolve to `undefined` are * skipped if a destination value exists. Array and plain object properties * are merged recursively. Other objects and value types are overridden by * assignment. Source objects are applied from left to right. Subsequent * sources overwrite property assignments of previous sources. * * **Note:** This method mutates `object`. * * @static * @memberOf _ * @since 0.5.0 * @category Object * @param {Object} object The destination object. * @param {...Object} [sources] The source objects. * @returns {Object} Returns `object`. * @example * * var users = { * 'data': [{ 'user': 'barney' }, { 'user': 'fred' }] * }; * * var ages = { * 'data': [{ 'age': 36 }, { 'age': 40 }] * }; * * _.merge(users, ages); * // => { 'data': [{ 'user': 'barney', 'age': 36 }, { 'user': 'fred', 'age': 40 }] } */ var merge = createAssigner(function(object, source, srcIndex) { baseMerge(object, source, srcIndex); }); /** * Sets the value at `path` of `object`. If a portion of `path` doesn't exist, * it's created. Arrays are created for missing index properties while objects * are created for all other missing properties. Use `_.setWith` to customize * `path` creation. * * **Note:** This method mutates `object`. * * @static * @memberOf _ * @since 3.7.0 * @category Object * @param {Object} object The object to modify. * @param {Array|string} path The path of the property to set. * @param {*} value The value to set. * @returns {Object} Returns `object`. * @example * * var object = { 'a': [{ 'b': { 'c': 3 } }] }; * * _.set(object, 'a[0].b.c', 4); * console.log(object.a[0].b.c); * // => 4 * * _.set(object, ['x', '0', 'y', 'z'], 5); * console.log(object.x[0].y.z); * // => 5 */ function set(object, path, value) { return object == null ? object : baseSet(object, path, value); } /** * Creates an array of the own enumerable string keyed property values of `object`. * * **Note:** Non-object values are coerced to objects. * * @static * @since 0.1.0 * @memberOf _ * @category Object * @param {Object} object The object to query. * @returns {Array} Returns the array of property values. * @example * * function Foo() { * this.a = 1; * this.b = 2; * } * * Foo.prototype.c = 3; * * _.values(new Foo); * // => [1, 2] (iteration order is not guaranteed) * * _.values('hi'); * // => ['h', 'i'] */ function values(object) { return object ? baseValues(object, keys(object)) : []; } /*------------------------------------------------------------------------*/ /** * This method returns the first argument given to it. * * @static * @since 0.1.0 * @memberOf _ * @category Util * @param {*} value Any value. * @returns {*} Returns `value`. * @example * * var object = { 'user': 'fred' }; * * console.log(_.identity(object) === object); * // => true */ function identity(value) { return value; } /** * Creates a function that invokes `func` with the arguments of the created * function. If `func` is a property name, the created function returns the * property value for a given element. If `func` is an array or object, the * created function returns `true` for elements that contain the equivalent * source properties, otherwise it returns `false`. * * @static * @since 4.0.0 * @memberOf _ * @category Util * @param {*} [func=_.identity] The value to convert to a callback. * @returns {Function} Returns the callback. * @example * * var users = [ * { 'user': 'barney', 'age': 36, 'active': true }, * { 'user': 'fred', 'age': 40, 'active': false } * ]; * * // The `_.matches` iteratee shorthand. * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true })); * // => [{ 'user': 'barney', 'age': 36, 'active': true }] * * // The `_.matchesProperty` iteratee shorthand. * _.filter(users, _.iteratee(['user', 'fred'])); * // => [{ 'user': 'fred', 'age': 40 }] * * // The `_.property` iteratee shorthand. * _.map(users, _.iteratee('user')); * // => ['barney', 'fred'] * * // Create custom iteratee shorthands. * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) { * return !_.isRegExp(func) ? iteratee(func) : function(string) { * return func.test(string); * }; * }); * * _.filter(['abc', 'def'], /ef/); * // => ['def'] */ function iteratee(func) { return baseIteratee(typeof func == 'function' ? func : baseClone(func, true)); } /** * A method that returns `undefined`. * * @static * @memberOf _ * @since 2.3.0 * @category Util * @example * * _.times(2, _.noop); * // => [undefined, undefined] */ function noop() { // No operation performed. } /** * Creates a function that returns the value at `path` of a given object. * * @static * @memberOf _ * @since 2.4.0 * @category Util * @param {Array|string} path The path of the property to get. * @returns {Function} Returns the new accessor function. * @example * * var objects = [ * { 'a': { 'b': 2 } }, * { 'a': { 'b': 1 } } * ]; * * _.map(objects, _.property('a.b')); * // => [2, 1] * * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b'); * // => [1, 2] */ function property(path) { return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path); } /** * A method that returns a new empty array. * * @static * @memberOf _ * @since 4.13.0 * @category Util * @returns {Array} Returns the new empty array. * @example * * var arrays = _.times(2, _.stubArray); * * console.log(arrays); * // => [[], []] * * console.log(arrays[0] === arrays[1]); * // => false */ function stubArray() { return []; } /** * A method that returns `false`. * * @static * @memberOf _ * @since 4.13.0 * @category Util * @returns {boolean} Returns `false`. * @example * * _.times(2, _.stubFalse); * // => [false, false] */ function stubFalse() { return false; } /*------------------------------------------------------------------------*/ // Add methods that return wrapped values in chain sequences. lodash.iteratee = iteratee; lodash.keys = keys; lodash.keysIn = keysIn; lodash.memoize = memoize; lodash.merge = merge; lodash.property = property; lodash.rest = rest; lodash.set = set; lodash.toArray = toArray; lodash.toPlainObject = toPlainObject; lodash.union = union; lodash.values = values; /*------------------------------------------------------------------------*/ // Add methods that return unwrapped values in chain sequences. lodash.eq = eq; lodash.forEach = forEach; lodash.get = get; lodash.hasIn = hasIn; lodash.identity = identity; lodash.includes = includes; lodash.isArguments = isArguments; lodash.isArray = isArray; lodash.isArrayLike = isArrayLike; lodash.isArrayLikeObject = isArrayLikeObject; lodash.isBuffer = isBuffer; lodash.isFunction = isFunction; lodash.isLength = isLength; lodash.isObject = isObject; lodash.isObjectLike = isObjectLike; lodash.isPlainObject = isPlainObject; lodash.isString = isString; lodash.isSymbol = isSymbol; lodash.isTypedArray = isTypedArray; lodash.isUndefined = isUndefined; lodash.stubArray = stubArray; lodash.stubFalse = stubFalse; lodash.noop = noop; lodash.toFinite = toFinite; lodash.toInteger = toInteger; lodash.toNumber = toNumber; lodash.toString = toString; // Add aliases. lodash.each = forEach; /*------------------------------------------------------------------------*/ /** * The semantic version number. * * @static * @memberOf _ * @type {string} */ lodash.VERSION = VERSION; /*--------------------------------------------------------------------------*/ if (freeModule) { // Export for Node.js. (freeModule.exports = lodash)._ = lodash; // Export for CommonJS support. freeExports._ = lodash; } }.call(this));