X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs-website;a=blobdiff_plain;f=node_modules%2Fgrunt-legacy-log-utils%2Fnode_modules%2Flodash%2Fcore.js;fp=node_modules%2Fgrunt-legacy-log-utils%2Fnode_modules%2Flodash%2Fcore.js;h=ee2a004e74702d7ff3ef87a7550daec41ad48c27;hp=0000000000000000000000000000000000000000;hb=a2bd1bf0c2c1f1a17d188f4dc0726a45494cefae;hpb=57c063afa3f66b07c4bbddc2d6129a96d90f0aad diff --git a/node_modules/grunt-legacy-log-utils/node_modules/lodash/core.js b/node_modules/grunt-legacy-log-utils/node_modules/lodash/core.js new file mode 100644 index 000000000..ee2a004e7 --- /dev/null +++ b/node_modules/grunt-legacy-log-utils/node_modules/lodash/core.js @@ -0,0 +1,3814 @@ +/** + * @license + * lodash 4.3.0 (Custom Build) + * Build: `lodash core -o ./dist/lodash.core.js` + * Copyright 2012-2016 The Dojo Foundation + * Based on Underscore.js 1.8.3 + * Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors + * Available under MIT license + */ +;(function() { + + /** Used as a safe reference for `undefined` in pre-ES5 environments. */ + var undefined; + + /** Used as the semantic version number. */ + var VERSION = '4.3.0'; + + /** Used to compose bitmasks for wrapper metadata. */ + var BIND_FLAG = 1, + PARTIAL_FLAG = 32; + + /** Used to compose bitmasks for comparison styles. */ + var UNORDERED_COMPARE_FLAG = 1, + PARTIAL_COMPARE_FLAG = 2; + + /** Used as the `TypeError` message for "Functions" methods. */ + var FUNC_ERROR_TEXT = 'Expected a function'; + + /** Used as references for various `Number` constants. */ + var MAX_SAFE_INTEGER = 9007199254740991; + + /** `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]', + numberTag = '[object Number]', + objectTag = '[object Object]', + regexpTag = '[object RegExp]', + stringTag = '[object String]'; + + /** Used to match HTML entities and HTML characters. */ + var reUnescapedHtml = /[&<>"'`]/g, + reHasUnescapedHtml = RegExp(reUnescapedHtml.source); + + /** Used to detect unsigned integer values. */ + var reIsUint = /^(?:0|[1-9]\d*)$/; + + /** Used to map characters to HTML entities. */ + var htmlEscapes = { + '&': '&', + '<': '<', + '>': '>', + '"': '"', + "'": ''', + '`': '`' + }; + + /** Used to determine if values are of the language type `Object`. */ + var objectTypes = { + 'function': true, + 'object': true + }; + + /** Detect free variable `exports`. */ + var freeExports = (objectTypes[typeof exports] && exports && !exports.nodeType) ? exports : null; + + /** Detect free variable `module`. */ + var freeModule = (objectTypes[typeof module] && module && !module.nodeType) ? module : null; + + /** Detect free variable `global` from Node.js. */ + var freeGlobal = checkGlobal(freeExports && freeModule && typeof global == 'object' && global); + + /** Detect free variable `self`. */ + var freeSelf = checkGlobal(objectTypes[typeof self] && self); + + /** Detect free variable `window`. */ + var freeWindow = checkGlobal(objectTypes[typeof window] && window); + + /** Detect the popular CommonJS extension `module.exports`. */ + var moduleExports = (freeModule && freeModule.exports === freeExports) ? freeExports : null; + + /** Detect `this` as the global object. */ + var thisGlobal = checkGlobal(objectTypes[typeof this] && this); + + /** + * Used as a reference to the global object. + * + * The `this` value is used if it's the global object to avoid Greasemonkey's + * restricted `window` object, otherwise the `window` object is used. + */ + var root = freeGlobal || ((freeWindow !== (thisGlobal && thisGlobal.window)) && freeWindow) || freeSelf || thisGlobal || Function('return this')(); + + /*--------------------------------------------------------------------------*/ + + /** + * Creates a new array concatenating `array` with `other`. + * + * @private + * @param {Array} array The first array to concatenate. + * @param {Array} other The second array to concatenate. + * @returns {Array} Returns the new concatenated array. + */ + function arrayConcat(array, other) { + return arrayPush(copyArray(array), values); + } + + /** + * 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; + } + + /** + * The base implementation of methods like `_.max` and `_.min` which accepts a + * `comparator` to determine the extremum value. + * + * @private + * @param {Array} array The array to iterate over. + * @param {Function} iteratee The iteratee invoked per iteration. + * @param {Function} comparator The comparator used to compare values. + * @returns {*} Returns the extremum value. + */ + function baseExtremum(array, iteratee, comparator) { + var index = -1, + length = array.length; + + while (++index < length) { + var value = array[index], + current = iteratee(value); + + if (current != null && (computed === undefined + ? current === current + : comparator(current, computed) + )) { + var computed = current, + result = value; + } + } + return result; + } + + /** + * The base implementation of methods like `_.find` and `_.findKey`, without + * support for iteratee shorthands, which iterates over `collection` using + * `eachFunc`. + * + * @private + * @param {Array|Object} collection The collection to search. + * @param {Function} predicate The function invoked per iteration. + * @param {Function} eachFunc The function to iterate over `collection`. + * @param {boolean} [retKey] Specify returning the key of the found element instead of the element itself. + * @returns {*} Returns the found element or its key, else `undefined`. + */ + function baseFind(collection, predicate, eachFunc, retKey) { + var result; + eachFunc(collection, function(value, key, collection) { + if (predicate(value, key, collection)) { + result = retKey ? key : value; + return false; + } + }); + return result; + } + + /** + * The base implementation of `_.reduce` and `_.reduceRight`, without support + * for iteratee shorthands, which iterates over `collection` using `eachFunc`. + * + * @private + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @param {*} accumulator The initial value. + * @param {boolean} initAccum Specify using the first or last element of `collection` as the initial value. + * @param {Function} eachFunc The function to iterate over `collection`. + * @returns {*} Returns the accumulated value. + */ + function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) { + eachFunc(collection, function(value, index, collection) { + accumulator = initAccum + ? (initAccum = false, value) + : iteratee(accumulator, value, index, collection); + }); + return accumulator; + } + + /** + * 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 baseMap(props, function(key) { + return object[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; + } + + /** + * Compares values to sort them in ascending order. + * + * @private + * @param {*} value The value to compare. + * @param {*} other The other value to compare. + * @returns {number} Returns the sort order indicator for `value`. + */ + function compareAscending(value, other) { + if (value !== other) { + var valIsNull = value === null, + valIsUndef = value === undefined, + valIsReflexive = value === value; + + var othIsNull = other === null, + othIsUndef = other === undefined, + othIsReflexive = other === other; + + if ((value > other && !othIsNull) || !valIsReflexive || + (valIsNull && !othIsUndef && othIsReflexive) || + (valIsUndef && othIsReflexive)) { + return 1; + } + if ((value < other && !valIsNull) || !othIsReflexive || + (othIsNull && !valIsUndef && valIsReflexive) || + (othIsUndef && valIsReflexive)) { + return -1; + } + } + return 0; + } + + /** + * Used by `_.escape` to convert characters to HTML entities. + * + * @private + * @param {string} chr The matched character to escape. + * @returns {string} Returns the escaped character. + */ + function escapeHtmlChar(chr) { + return htmlEscapes[chr]; + } + + /** + * 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; + } + + /** + * 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) { + value = (typeof value == 'number' || reIsUint.test(value)) ? +value : -1; + length = length == null ? MAX_SAFE_INTEGER : length; + return value > -1 && value % 1 == 0 && value < length; + } + + /** + * 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; + } + + /*--------------------------------------------------------------------------*/ + + /** Used for built-in method references. */ + var arrayProto = Array.prototype, + objectProto = Object.prototype; + + /** Used to check objects for own properties. */ + var hasOwnProperty = objectProto.hasOwnProperty; + + /** Used to generate unique IDs. */ + var idCounter = 0; + + /** + * 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 restore the original `_` reference in `_.noConflict`. */ + var oldDash = root._; + + /** Built-in value references. */ + var Reflect = root.Reflect, + Symbol = root.Symbol, + Uint8Array = root.Uint8Array, + enumerate = Reflect ? Reflect.enumerate : undefined, + propertyIsEnumerable = objectProto.propertyIsEnumerable; + + /* Built-in method references for those with the same name as other `lodash` methods. */ + var nativeIsFinite = root.isFinite, + nativeKeys = Object.keys, + nativeMax = Math.max; + + /*------------------------------------------------------------------------*/ + + /** + * Creates a `lodash` object which wraps `value` to enable implicit method + * chaining. 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 chaining, which must be unwrapped with `_#value` in all cases, + * 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 two hundred 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`, `chain`, `chunk`, `commit`, + * `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`, `curry`, + * `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`, `difference`, + * `differenceBy`, `differenceWith`, `drop`, `dropRight`, `dropRightWhile`, + * `dropWhile`, `fill`, `filter`, `flatten`, `flattenDeep`, `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`, `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`, `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`, `endsWith`, `eq`, + * `escape`, `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, + * `findLast`, `findLastIndex`, `findLastKey`, `floor`, `forEach`, `forEachRight`, + * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`, + * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`, + * `isArguments`, `isArray`, `isArrayLike`, `isArrayLikeObject`, `isBoolean`, + * `isDate`, `isElement`, `isEmpty`, `isEqual`, `isEqualWith`, `isError`, + * `isFinite`, `isFunction`, `isInteger`, `isLength`, `isMatch`, `isMatchWith`, + * `isNaN`, `isNative`, `isNil`, `isNull`, `isNumber`, `isObject`, `isObjectLike`, + * `isPlainObject`, `isRegExp`, `isSafeInteger`, `isString`, `isUndefined`, + * `isTypedArray`, `join`, `kebabCase`, `last`, `lastIndexOf`, `lowerCase`, + * `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `min`, `minBy`, + * `noConflict`, `noop`, `now`, `pad`, `padEnd`, `padStart`, `parseInt`, + * `pop`, `random`, `reduce`, `reduceRight`, `repeat`, `result`, `round`, + * `runInContext`, `sample`, `shift`, `size`, `snakeCase`, `some`, `sortedIndex`, + * `sortedIndexBy`, `sortedLastIndex`, `sortedLastIndexBy`, `startCase`, + * `startsWith`, `subtract`, `sum`, `sumBy`, `template`, `times`, `toLower`, + * `toInteger`, `toLength`, `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(value) { + if (isObjectLike(value) && !isArray(value)) { + if (value instanceof LodashWrapper) { + return value; + } + if (hasOwnProperty.call(value, '__wrapped__')) { + return wrapperClone(value); + } + } + return new LodashWrapper(value); + } + + /** + * The base constructor for creating `lodash` wrapper objects. + * + * @private + * @param {*} value The value to wrap. + * @param {boolean} [chainAll] Enable chaining for all wrapper methods. + */ + function LodashWrapper(value, chainAll) { + this.__wrapped__ = value; + this.__actions__ = []; + this.__chain__ = !!chainAll; + } + + /*------------------------------------------------------------------------*/ + + /** + * Used by `_.defaults` to customize its `_.assignIn` use. + * + * @private + * @param {*} objValue The destination value. + * @param {*} srcValue The source value. + * @param {string} key The key of the property to assign. + * @param {Object} object The parent object of `objValue`. + * @returns {*} Returns the value to assign. + */ + function assignInDefaults(objValue, srcValue, key, object) { + if (objValue === undefined || + (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) { + return srcValue; + } + return objValue; + } + + /** + * 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 ((!eq(objValue, value) || + (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) || + (value === undefined && !(key in object))) { + object[key] = value; + } + } + + /** + * 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. + */ + var baseCreate = (function() { + function object() {} + return function(prototype) { + if (isObject(prototype)) { + object.prototype = prototype; + var result = new object; + object.prototype = undefined; + } + return result || {}; + }; + }()); + + /** + * The base implementation of `_.delay` and `_.defer` which accepts an array + * of `func` arguments. + * + * @private + * @param {Function} func The function to delay. + * @param {number} wait The number of milliseconds to delay invocation. + * @param {Object} args The arguments to provide to `func`. + * @returns {number} Returns the timer id. + */ + function baseDelay(func, wait, args) { + if (typeof func != 'function') { + throw new TypeError(FUNC_ERROR_TEXT); + } + return setTimeout(function() { func.apply(undefined, args); }, wait); + } + + /** + * 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 `_.every` without support for iteratee shorthands. + * + * @private + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} predicate The function invoked per iteration. + * @returns {boolean} Returns `true` if all elements pass the predicate check, else `false` + */ + function baseEvery(collection, predicate) { + var result = true; + baseEach(collection, function(value, index, collection) { + result = !!predicate(value, index, collection); + return result; + }); + return result; + } + + /** + * The base implementation of `_.filter` without support for iteratee shorthands. + * + * @private + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} predicate The function invoked per iteration. + * @returns {Array} Returns the new filtered array. + */ + function baseFilter(collection, predicate) { + var result = []; + baseEach(collection, function(value, index, collection) { + if (predicate(value, index, collection)) { + result.push(value); + } + }); + return result; + } + + /** + * The base implementation of `_.flatten` with support for restricting flattening. + * + * @private + * @param {Array} array The array to flatten. + * @param {boolean} [isDeep] Specify a deep flatten. + * @param {boolean} [isStrict] Restrict flattening to arrays-like objects. + * @param {Array} [result=[]] The initial result value. + * @returns {Array} Returns the new flattened array. + */ + function baseFlatten(array, isDeep, isStrict, result) { + result || (result = []); + + var index = -1, + length = array.length; + + while (++index < length) { + var value = array[index]; + if (isArrayLikeObject(value) && + (isStrict || isArray(value) || isArguments(value))) { + if (isDeep) { + // Recursively flatten arrays (susceptible to call stack limits). + baseFlatten(value, isDeep, isStrict, result); + } else { + arrayPush(result, value); + } + } else if (!isStrict) { + result[result.length] = value; + } + } + return result; + } + + /** + * The base implementation of `baseForIn` and `baseForOwn` which iterates + * over `object` properties returned by `keysFunc` invoking `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 `_.functions` which creates an array of + * `object` function property names filtered from `props`. + * + * @private + * @param {Object} object The object to inspect. + * @param {Array} props The property names to filter. + * @returns {Array} Returns the new array of filtered property names. + */ + function baseFunctions(object, props) { + return baseFilter(props, function(key) { + return isFunction(object[key]); + }); + } + + /** + * 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 = objectToString.call(object); + if (objTag == argsTag) { + objTag = objectTag; + } + } + if (!othIsArr) { + othTag = objectToString.call(other); + if (othTag == argsTag) { + othTag = objectTag; + } + } + var objIsObj = objTag == objectTag && !isHostObject(object), + othIsObj = othTag == objectTag && !isHostObject(other), + isSameTag = objTag == othTag; + + if (isSameTag && !(objIsArr || objIsObj)) { + return equalByTag(object, other, objTag, equalFunc, customizer, bitmask); + } + var isPartial = bitmask & PARTIAL_COMPARE_FLAG; + if (!isPartial) { + var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'), + othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__'); + + if (objIsWrapped || othIsWrapped) { + return equalFunc(objIsWrapped ? object.value() : object, othIsWrapped ? other.value() : other, customizer, bitmask, stack); + } + } + if (!isSameTag) { + return false; + } + stack || (stack = []); + var stacked = find(stack, function(entry) { + return entry[0] === object; + }); + if (stacked && stacked[1]) { + return stacked[1] == other; + } + stack.push([object, other]); + var result = (objIsArr ? equalArrays : equalObjects)(object, other, equalFunc, customizer, bitmask, stack); + stack.pop(); + return result; + } + + /** + * The base implementation of `_.iteratee`. + * + * @private + * @param {*} [value=_.identity] The value to convert to an iteratee. + * @returns {Function} Returns the iteratee. + */ + function baseIteratee(func) { + var type = typeof func; + if (type == 'function') { + return func; + } + return func == null + ? identity + : (type == 'object' ? baseMatches : baseProperty)(func); + } + + /** + * The base implementation of `_.keys` which doesn't skip the constructor + * property of prototypes or treat sparse arrays as dense. + * + * @private + * @type Function + * @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 `_.map` 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} Returns the new mapped array. + */ + function baseMap(collection, iteratee) { + var index = -1, + result = isArrayLike(collection) ? Array(collection.length) : []; + + baseEach(collection, function(value, key, collection) { + result[++index] = iteratee(value, key, collection); + }); + return result; + } + + /** + * 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 function. + */ + function baseMatches(source) { + var props = keys(source); + return function(object) { + var length = props.length; + if (object == null) { + return !length; + } + object = Object(object); + while (length--) { + var key = props[length]; + if (!(key in object && + baseIsEqual(source[key], object[key], undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG) + )) { + return false; + } + } + return true; + }; + } + + /** + * The base implementation of `_.pick` without support for individual + * property names. + * + * @private + * @param {Object} object The source object. + * @param {string[]} props The property names to pick. + * @returns {Object} Returns the new object. + */ + function basePick(object, props) { + object = Object(object); + return reduce(props, function(result, key) { + if (key in object) { + result[key] = object[key]; + } + return result; + }, {}); + } + + /** + * 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 function. + */ + function baseProperty(key) { + return function(object) { + return object == null ? undefined : object[key]; + }; + } + + /** + * The base implementation of `_.slice` without an iteratee call guard. + * + * @private + * @param {Array} array The array to slice. + * @param {number} [start=0] The start position. + * @param {number} [end=array.length] The end position. + * @returns {Array} Returns the slice of `array`. + */ + function baseSlice(array, start, end) { + var index = -1, + length = array.length; + + if (start < 0) { + start = -start > length ? 0 : (length + start); + } + end = end > length ? length : end; + if (end < 0) { + end += length; + } + length = start > end ? 0 : ((end - start) >>> 0); + start >>>= 0; + + var result = Array(length); + while (++index < length) { + result[index] = array[index + start]; + } + return result; + } + + /** + * 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) { + return baseSlice(source, 0, source.length); + } + + /** + * The base implementation of `_.some` without support for iteratee shorthands. + * + * @private + * @param {Array|Object} collection The collection 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 baseSome(collection, predicate) { + var result; + + baseEach(collection, function(value, index, collection) { + result = predicate(value, index, collection); + return !result; + }); + return !!result; + } + + /** + * The base implementation of `wrapperValue` which returns the result of + * performing a sequence of actions on the unwrapped `value`, where each + * successive action is supplied the return value of the previous. + * + * @private + * @param {*} value The unwrapped value. + * @param {Array} actions Actions to perform to resolve the unwrapped value. + * @returns {*} Returns the resolved value. + */ + function baseWrapperValue(value, actions) { + var result = value; + return reduce(actions, function(result, action) { + return action.func.apply(action.thisArg, arrayPush([result], action.args)); + }, result); + } + + /** + * Copies properties of `source` to `object`. + * + * @private + * @param {Object} source The object to copy properties from. + * @param {Array} props The property names to copy. + * @param {Object} [object={}] The object to copy properties to. + * @returns {Object} Returns `object`. + */ + var copyObject = copyObjectWith; + + /** + * This function is like `copyObject` except that it accepts a function to + * customize copied values. + * + * @private + * @param {Object} source The object to copy properties from. + * @param {Array} props The property names 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 copyObjectWith(source, props, object, customizer) { + object || (object = {}); + + var index = -1, + length = props.length; + + while (++index < length) { + var key = props[index], + newValue = customizer ? customizer(object[key], source[key], key, object, source) : source[key]; + + assignValue(object, key, newValue); + } + return 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; + + customizer = typeof customizer == 'function' ? (length--, customizer) : undefined; + 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`. + * + * @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 function that produces an instance of `Ctor` regardless of + * whether it was invoked as part of a `new` expression or by `call` or `apply`. + * + * @private + * @param {Function} Ctor The constructor to wrap. + * @returns {Function} Returns the new wrapped function. + */ + function createCtorWrapper(Ctor) { + return function() { + // Use a `switch` statement to work with class constructors. + // See http://ecma-international.org/ecma-262/6.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist + // for more details. + var args = arguments; + var thisBinding = baseCreate(Ctor.prototype), + result = Ctor.apply(thisBinding, args); + + // Mimic the constructor's `return` behavior. + // See https://es5.github.io/#x13.2.2 for more details. + return isObject(result) ? result : thisBinding; + }; + } + + /** + * Creates a function that wraps `func` to invoke it with the optional `this` + * binding of `thisArg` and the `partials` prepended to those provided to + * the wrapper. + * + * @private + * @param {Function} func The function to wrap. + * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper` for more details. + * @param {*} thisArg The `this` binding of `func`. + * @param {Array} partials The arguments to prepend to those provided to the new function. + * @returns {Function} Returns the new wrapped function. + */ + function createPartialWrapper(func, bitmask, thisArg, partials) { + if (typeof func != 'function') { + throw new TypeError(FUNC_ERROR_TEXT); + } + var isBind = bitmask & BIND_FLAG, + Ctor = createCtorWrapper(func); + + function wrapper() { + var argsIndex = -1, + argsLength = arguments.length, + leftIndex = -1, + leftLength = partials.length, + args = Array(leftLength + argsLength), + fn = (this && this !== root && this instanceof wrapper) ? Ctor : func; + + while (++leftIndex < leftLength) { + args[leftIndex] = partials[leftIndex]; + } + while (argsLength--) { + args[leftIndex++] = arguments[++argsIndex]; + } + return fn.apply(isBind ? thisArg : this, args); + } + return wrapper; + } + + /** + * 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 index = -1, + isPartial = bitmask & PARTIAL_COMPARE_FLAG, + isUnordered = bitmask & UNORDERED_COMPARE_FLAG, + arrLength = array.length, + othLength = other.length; + + if (arrLength != othLength && !(isPartial && othLength > arrLength)) { + return false; + } + var result = true; + + // Ignore non-index properties. + while (++index < arrLength) { + var arrValue = array[index], + othValue = other[index]; + + var compared; + if (compared !== undefined) { + if (compared) { + continue; + } + result = false; + break; + } + // Recursively compare arrays (susceptible to call stack limits). + if (isUnordered) { + if (!baseSome(other, function(othValue) { + return arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack); + })) { + result = false; + break; + } + } else if (!(arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) { + result = false; + break; + } + } + 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. + * @returns {boolean} Returns `true` if the objects are equivalent, else `false`. + */ + function equalByTag(object, other, tag, equalFunc, customizer, bitmask) { + switch (tag) { + + 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 string + // objects as equal. See https://es5.github.io/#x15.10.6.4 for more details. + return object == (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 : hasOwnProperty.call(other, key))) { + return false; + } + } + var result = true; + + var skipCtor = isPartial; + while (++index < objLength) { + key = objProps[index]; + var objValue = object[key], + othValue = other[key]; + + var compared; + // 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; + } + } + return 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'); + + /** + * 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 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; + } + + /** + * Converts `value` to a function if it's not one. + * + * @private + * @param {*} value The value to process. + * @returns {Function} Returns the function. + */ + function toFunction(value) { + return typeof value == 'function' ? value : identity; + } + + /** + * Creates a clone of `wrapper`. + * + * @private + * @param {Object} wrapper The wrapper to clone. + * @returns {Object} Returns the cloned wrapper. + */ + function wrapperClone(wrapper) { + var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__); + result.__actions__ = copyArray(wrapper.__actions__); + return result; + } + + /*------------------------------------------------------------------------*/ + + /** + * Creates an array with all falsey values removed. The values `false`, `null`, + * `0`, `""`, `undefined`, and `NaN` are falsey. + * + * @static + * @memberOf _ + * @category Array + * @param {Array} array The array to compact. + * @returns {Array} Returns the new array of filtered values. + * @example + * + * _.compact([0, 1, false, 2, '', 3]); + * // => [1, 2, 3] + */ + function compact(array) { + return baseFilter(array, Boolean); + } + + /** + * Creates a new array concatenating `array` with any additional arrays + * and/or values. + * + * @static + * @memberOf _ + * @category Array + * @param {Array} array The array to concatenate. + * @param {...*} [values] The values to concatenate. + * @returns {Array} Returns the new concatenated array. + * @example + * + * var array = [1]; + * var other = _.concat(array, 2, [3], [[4]]); + * + * console.log(other); + * // => [1, 2, 3, [4]] + * + * console.log(array); + * // => [1] + */ + var concat = rest(function(array, values) { + if (!isArray(array)) { + array = array == null ? [] : [Object(array)]; + } + values = baseFlatten(values); + return arrayConcat(array, values); + }); + + /** + * Flattens `array` a single level. + * + * @static + * @memberOf _ + * @category Array + * @param {Array} array The array to flatten. + * @returns {Array} Returns the new flattened array. + * @example + * + * _.flatten([1, [2, 3, [4]]]); + * // => [1, 2, 3, [4]] + */ + function flatten(array) { + var length = array ? array.length : 0; + return length ? baseFlatten(array) : []; + } + + /** + * This method is like `_.flatten` except that it recursively flattens `array`. + * + * @static + * @memberOf _ + * @category Array + * @param {Array} array The array to recursively flatten. + * @returns {Array} Returns the new flattened array. + * @example + * + * _.flattenDeep([1, [2, 3, [4]]]); + * // => [1, 2, 3, 4] + */ + function flattenDeep(array) { + var length = array ? array.length : 0; + return length ? baseFlatten(array, true) : []; + } + + /** + * Gets the first element of `array`. + * + * @static + * @memberOf _ + * @alias first + * @category Array + * @param {Array} array The array to query. + * @returns {*} Returns the first element of `array`. + * @example + * + * _.head([1, 2, 3]); + * // => 1 + * + * _.head([]); + * // => undefined + */ + function head(array) { + return array ? array[0] : undefined; + } + + /** + * Gets the index at which the first occurrence of `value` is found in `array` + * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero) + * for equality comparisons. If `fromIndex` is negative, it's used as the offset + * from the end of `array`. + * + * @static + * @memberOf _ + * @category Array + * @param {Array} array The array to search. + * @param {*} value The value to search for. + * @param {number} [fromIndex=0] The index to search from. + * @returns {number} Returns the index of the matched value, else `-1`. + * @example + * + * _.indexOf([1, 2, 1, 2], 2); + * // => 1 + * + * // Search from the `fromIndex`. + * _.indexOf([1, 2, 1, 2], 2, 2); + * // => 3 + */ + function indexOf(array, value, fromIndex) { + var length = array ? array.length : 0; + if (typeof fromIndex == 'number') { + fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : fromIndex; + } else { + fromIndex = 0; + } + var index = (fromIndex || 0) - 1, + isReflexive = value === value; + + while (++index < length) { + var other = array[index]; + if ((isReflexive ? other === value : other !== other)) { + return index; + } + } + return -1; + } + + /** + * Gets the last element of `array`. + * + * @static + * @memberOf _ + * @category Array + * @param {Array} array The array to query. + * @returns {*} Returns the last element of `array`. + * @example + * + * _.last([1, 2, 3]); + * // => 3 + */ + function last(array) { + var length = array ? array.length : 0; + return length ? array[length - 1] : undefined; + } + + /** + * Creates a slice of `array` from `start` up to, but not including, `end`. + * + * **Note:** This method is used instead of [`Array#slice`](https://mdn.io/Array/slice) + * to ensure dense arrays are returned. + * + * @static + * @memberOf _ + * @category Array + * @param {Array} array The array to slice. + * @param {number} [start=0] The start position. + * @param {number} [end=array.length] The end position. + * @returns {Array} Returns the slice of `array`. + */ + function slice(array, start, end) { + var length = array ? array.length : 0; + start = start == null ? 0 : +start; + end = end === undefined ? length : +end; + return length ? baseSlice(array, start, end) : []; + } + + /*------------------------------------------------------------------------*/ + + /** + * Creates a `lodash` object that wraps `value` with explicit method chaining enabled. + * The result of such method chaining must be unwrapped with `_#value`. + * + * @static + * @memberOf _ + * @category Seq + * @param {*} value The value to wrap. + * @returns {Object} Returns the new `lodash` wrapper instance. + * @example + * + * var users = [ + * { 'user': 'barney', 'age': 36 }, + * { 'user': 'fred', 'age': 40 }, + * { 'user': 'pebbles', 'age': 1 } + * ]; + * + * var youngest = _ + * .chain(users) + * .sortBy('age') + * .map(function(o) { + * return o.user + ' is ' + o.age; + * }) + * .head() + * .value(); + * // => 'pebbles is 1' + */ + function chain(value) { + var result = lodash(value); + result.__chain__ = true; + return result; + } + + /** + * This method invokes `interceptor` and returns `value`. The interceptor + * is invoked with one argument; (value). The purpose of this method is to + * "tap into" a method chain in order to modify intermediate results. + * + * @static + * @memberOf _ + * @category Seq + * @param {*} value The value to provide to `interceptor`. + * @param {Function} interceptor The function to invoke. + * @returns {*} Returns `value`. + * @example + * + * _([1, 2, 3]) + * .tap(function(array) { + * // Mutate input array. + * array.pop(); + * }) + * .reverse() + * .value(); + * // => [2, 1] + */ + function tap(value, interceptor) { + interceptor(value); + return value; + } + + /** + * This method is like `_.tap` except that it returns the result of `interceptor`. + * The purpose of this method is to "pass thru" values replacing intermediate + * results in a method chain. + * + * @static + * @memberOf _ + * @category Seq + * @param {*} value The value to provide to `interceptor`. + * @param {Function} interceptor The function to invoke. + * @returns {*} Returns the result of `interceptor`. + * @example + * + * _(' abc ') + * .chain() + * .trim() + * .thru(function(value) { + * return [value]; + * }) + * .value(); + * // => ['abc'] + */ + function thru(value, interceptor) { + return interceptor(value); + } + + /** + * Enables explicit method chaining on the wrapper object. + * + * @name chain + * @memberOf _ + * @category Seq + * @returns {Object} Returns the new `lodash` wrapper instance. + * @example + * + * var users = [ + * { 'user': 'barney', 'age': 36 }, + * { 'user': 'fred', 'age': 40 } + * ]; + * + * // A sequence without explicit chaining. + * _(users).head(); + * // => { 'user': 'barney', 'age': 36 } + * + * // A sequence with explicit chaining. + * _(users) + * .chain() + * .head() + * .pick('user') + * .value(); + * // => { 'user': 'barney' } + */ + function wrapperChain() { + return chain(this); + } + + /** + * Executes the chained sequence to extract the unwrapped value. + * + * @name value + * @memberOf _ + * @alias toJSON, valueOf + * @category Seq + * @returns {*} Returns the resolved unwrapped value. + * @example + * + * _([1, 2, 3]).value(); + * // => [1, 2, 3] + */ + function wrapperValue() { + return baseWrapperValue(this.__wrapped__, this.__actions__); + } + + /*------------------------------------------------------------------------*/ + + /** + * Checks if `predicate` returns truthy for **all** elements of `collection`. + * Iteration is stopped once `predicate` returns falsey. The predicate is + * invoked with three arguments: (value, index|key, collection). + * + * @static + * @memberOf _ + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration. + * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`. + * @returns {boolean} Returns `true` if all elements pass the predicate check, else `false`. + * @example + * + * _.every([true, 1, null, 'yes'], Boolean); + * // => false + * + * var users = [ + * { 'user': 'barney', 'active': false }, + * { 'user': 'fred', 'active': false } + * ]; + * + * // The `_.matches` iteratee shorthand. + * _.every(users, { 'user': 'barney', 'active': false }); + * // => false + * + * // The `_.matchesProperty` iteratee shorthand. + * _.every(users, ['active', false]); + * // => true + * + * // The `_.property` iteratee shorthand. + * _.every(users, 'active'); + * // => false + */ + function every(collection, predicate, guard) { + predicate = guard ? undefined : predicate; + return baseEvery(collection, baseIteratee(predicate)); + } + + /** + * Iterates over elements of `collection`, returning an array of all elements + * `predicate` returns truthy for. The predicate is invoked with three arguments: + * (value, index|key, collection). + * + * @static + * @memberOf _ + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration. + * @returns {Array} Returns the new filtered array. + * @example + * + * var users = [ + * { 'user': 'barney', 'age': 36, 'active': true }, + * { 'user': 'fred', 'age': 40, 'active': false } + * ]; + * + * _.filter(users, function(o) { return !o.active; }); + * // => objects for ['fred'] + * + * // The `_.matches` iteratee shorthand. + * _.filter(users, { 'age': 36, 'active': true }); + * // => objects for ['barney'] + * + * // The `_.matchesProperty` iteratee shorthand. + * _.filter(users, ['active', false]); + * // => objects for ['fred'] + * + * // The `_.property` iteratee shorthand. + * _.filter(users, 'active'); + * // => objects for ['barney'] + */ + function filter(collection, predicate) { + return baseFilter(collection, baseIteratee(predicate)); + } + + /** + * Iterates over elements of `collection`, returning the first element + * `predicate` returns truthy for. The predicate is invoked with three arguments: + * (value, index|key, collection). + * + * @static + * @memberOf _ + * @category Collection + * @param {Array|Object} collection The collection to search. + * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration. + * @returns {*} Returns the matched element, else `undefined`. + * @example + * + * var users = [ + * { 'user': 'barney', 'age': 36, 'active': true }, + * { 'user': 'fred', 'age': 40, 'active': false }, + * { 'user': 'pebbles', 'age': 1, 'active': true } + * ]; + * + * _.find(users, function(o) { return o.age < 40; }); + * // => object for 'barney' + * + * // The `_.matches` iteratee shorthand. + * _.find(users, { 'age': 1, 'active': true }); + * // => object for 'pebbles' + * + * // The `_.matchesProperty` iteratee shorthand. + * _.find(users, ['active', false]); + * // => object for 'fred' + * + * // The `_.property` iteratee shorthand. + * _.find(users, 'active'); + * // => object for 'barney' + */ + function find(collection, predicate) { + return baseFind(collection, baseIteratee(predicate), baseEach); + } + + /** + * Iterates over elements of `collection` invoking `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 _ + * @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`. + * @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) { + return baseEach(collection, toFunction(iteratee)); + } + + /** + * Creates an array of values by running each element in `collection` through + * `iteratee`. The iteratee is invoked with three arguments: + * (value, index|key, collection). + * + * Many lodash methods are guarded to work as iteratees for methods like + * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`. + * + * The guarded methods are: + * `ary`, `curry`, `curryRight`, `drop`, `dropRight`, `every`, `fill`, + * `invert`, `parseInt`, `random`, `range`, `rangeRight`, `slice`, `some`, + * `sortBy`, `take`, `takeRight`, `template`, `trim`, `trimEnd`, `trimStart`, + * and `words` + * + * @static + * @memberOf _ + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function|Object|string} [iteratee=_.identity] The function invoked per iteration. + * @returns {Array} Returns the new mapped array. + * @example + * + * function square(n) { + * return n * n; + * } + * + * _.map([4, 8], square); + * // => [16, 64] + * + * _.map({ 'a': 4, 'b': 8 }, square); + * // => [16, 64] (iteration order is not guaranteed) + * + * var users = [ + * { 'user': 'barney' }, + * { 'user': 'fred' } + * ]; + * + * // The `_.property` iteratee shorthand. + * _.map(users, 'user'); + * // => ['barney', 'fred'] + */ + function map(collection, iteratee) { + return baseMap(collection, baseIteratee(iteratee)); + } + + /** + * Reduces `collection` to a value which is the accumulated result of running + * each element in `collection` through `iteratee`, where each successive + * invocation is supplied the return value of the previous. If `accumulator` + * is not given the first element of `collection` is used as the initial + * value. The iteratee is invoked with four arguments: + * (accumulator, value, index|key, collection). + * + * Many lodash methods are guarded to work as iteratees for methods like + * `_.reduce`, `_.reduceRight`, and `_.transform`. + * + * The guarded methods are: + * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`, + * and `sortBy` + * + * @static + * @memberOf _ + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function} [iteratee=_.identity] The function invoked per iteration. + * @param {*} [accumulator] The initial value. + * @returns {*} Returns the accumulated value. + * @example + * + * _.reduce([1, 2], function(sum, n) { + * return sum + n; + * }, 0); + * // => 3 + * + * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) { + * (result[value] || (result[value] = [])).push(key); + * return result; + * }, {}); + * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed) + */ + function reduce(collection, iteratee, accumulator) { + return baseReduce(collection, baseIteratee(iteratee), accumulator, arguments.length < 3, baseEach); + } + + /** + * Gets the size of `collection` by returning its length for array-like + * values or the number of own enumerable properties for objects. + * + * @static + * @memberOf _ + * @category Collection + * @param {Array|Object} collection The collection to inspect. + * @returns {number} Returns the collection size. + * @example + * + * _.size([1, 2, 3]); + * // => 3 + * + * _.size({ 'a': 1, 'b': 2 }); + * // => 2 + * + * _.size('pebbles'); + * // => 7 + */ + function size(collection) { + if (collection == null) { + return 0; + } + collection = isArrayLike(collection) ? collection : keys(collection); + return collection.length; + } + + /** + * Checks if `predicate` returns truthy for **any** element of `collection`. + * Iteration is stopped once `predicate` returns truthy. The predicate is + * invoked with three arguments: (value, index|key, collection). + * + * @static + * @memberOf _ + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration. + * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`. + * @returns {boolean} Returns `true` if any element passes the predicate check, else `false`. + * @example + * + * _.some([null, 0, 'yes', false], Boolean); + * // => true + * + * var users = [ + * { 'user': 'barney', 'active': true }, + * { 'user': 'fred', 'active': false } + * ]; + * + * // The `_.matches` iteratee shorthand. + * _.some(users, { 'user': 'barney', 'active': false }); + * // => false + * + * // The `_.matchesProperty` iteratee shorthand. + * _.some(users, ['active', false]); + * // => true + * + * // The `_.property` iteratee shorthand. + * _.some(users, 'active'); + * // => true + */ + function some(collection, predicate, guard) { + predicate = guard ? undefined : predicate; + return baseSome(collection, baseIteratee(predicate)); + } + + /** + * Creates an array of elements, sorted in ascending order by the results of + * running each element in a collection through each iteratee. This method + * performs a stable sort, that is, it preserves the original sort order of + * equal elements. The iteratees are invoked with one argument: (value). + * + * @static + * @memberOf _ + * @category Collection + * @param {Array|Object} collection The collection to iterate over. + * @param {...(Function|Function[]|Object|Object[]|string|string[])} [iteratees=[_.identity]] + * The iteratees to sort by, specified individually or in arrays. + * @returns {Array} Returns the new sorted array. + * @example + * + * var users = [ + * { 'user': 'fred', 'age': 48 }, + * { 'user': 'barney', 'age': 36 }, + * { 'user': 'fred', 'age': 42 }, + * { 'user': 'barney', 'age': 34 } + * ]; + * + * _.sortBy(users, function(o) { return o.user; }); + * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 42]] + * + * _.sortBy(users, ['user', 'age']); + * // => objects for [['barney', 34], ['barney', 36], ['fred', 42], ['fred', 48]] + * + * _.sortBy(users, 'user', function(o) { + * return Math.floor(o.age / 10); + * }); + * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 42]] + */ + function sortBy(collection, iteratee) { + var index = 0; + iteratee = baseIteratee(iteratee); + + return baseMap(baseMap(collection, function(value, key, collection) { + return { 'value': value, 'index': index++, 'criteria': iteratee(value, key, collection) }; + }).sort(function(object, other) { + return compareAscending(object.criteria, other.criteria) || (object.index - other.index); + }), baseProperty('value')); + } + + /*------------------------------------------------------------------------*/ + + /** + * Creates a function that invokes `func`, with the `this` binding and arguments + * of the created function, while it's called less than `n` times. Subsequent + * calls to the created function return the result of the last `func` invocation. + * + * @static + * @memberOf _ + * @category Function + * @param {number} n The number of calls at which `func` is no longer invoked. + * @param {Function} func The function to restrict. + * @returns {Function} Returns the new restricted function. + * @example + * + * jQuery(element).on('click', _.before(5, addContactToList)); + * // => allows adding up to 4 contacts to the list + */ + function before(n, func) { + var result; + if (typeof func != 'function') { + throw new TypeError(FUNC_ERROR_TEXT); + } + n = toInteger(n); + return function() { + if (--n > 0) { + result = func.apply(this, arguments); + } + if (n <= 1) { + func = undefined; + } + return result; + }; + } + + /** + * Creates a function that invokes `func` with the `this` binding of `thisArg` + * and prepends any additional `_.bind` arguments to those provided to the + * bound function. + * + * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds, + * may be used as a placeholder for partially applied arguments. + * + * **Note:** Unlike native `Function#bind` this method doesn't set the "length" + * property of bound functions. + * + * @static + * @memberOf _ + * @category Function + * @param {Function} func The function to bind. + * @param {*} thisArg The `this` binding of `func`. + * @param {...*} [partials] The arguments to be partially applied. + * @returns {Function} Returns the new bound function. + * @example + * + * var greet = function(greeting, punctuation) { + * return greeting + ' ' + this.user + punctuation; + * }; + * + * var object = { 'user': 'fred' }; + * + * var bound = _.bind(greet, object, 'hi'); + * bound('!'); + * // => 'hi fred!' + * + * // Bound with placeholders. + * var bound = _.bind(greet, object, _, '!'); + * bound('hi'); + * // => 'hi fred!' + */ + var bind = rest(function(func, thisArg, partials) { + return createPartialWrapper(func, BIND_FLAG | PARTIAL_FLAG, thisArg, partials); + }); + + /** + * Defers invoking the `func` until the current call stack has cleared. Any + * additional arguments are provided to `func` when it's invoked. + * + * @static + * @memberOf _ + * @category Function + * @param {Function} func The function to defer. + * @param {...*} [args] The arguments to invoke `func` with. + * @returns {number} Returns the timer id. + * @example + * + * _.defer(function(text) { + * console.log(text); + * }, 'deferred'); + * // => logs 'deferred' after one or more milliseconds + */ + var defer = rest(function(func, args) { + return baseDelay(func, 1, args); + }); + + /** + * Invokes `func` after `wait` milliseconds. Any additional arguments are + * provided to `func` when it's invoked. + * + * @static + * @memberOf _ + * @category Function + * @param {Function} func The function to delay. + * @param {number} wait The number of milliseconds to delay invocation. + * @param {...*} [args] The arguments to invoke `func` with. + * @returns {number} Returns the timer id. + * @example + * + * _.delay(function(text) { + * console.log(text); + * }, 1000, 'later'); + * // => logs 'later' after one second + */ + var delay = rest(function(func, wait, args) { + return baseDelay(func, toNumber(wait) || 0, args); + }); + + /** + * Creates a function that negates the result of the predicate `func`. The + * `func` predicate is invoked with the `this` binding and arguments of the + * created function. + * + * @static + * @memberOf _ + * @category Function + * @param {Function} predicate The predicate to negate. + * @returns {Function} Returns the new function. + * @example + * + * function isEven(n) { + * return n % 2 == 0; + * } + * + * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven)); + * // => [1, 3, 5] + */ + function negate(predicate) { + if (typeof predicate != 'function') { + throw new TypeError(FUNC_ERROR_TEXT); + } + return function() { + return !predicate.apply(this, arguments); + }; + } + + /** + * Creates a function that is restricted to invoking `func` once. Repeat calls + * to the function return the value of the first invocation. The `func` is + * invoked with the `this` binding and arguments of the created function. + * + * @static + * @memberOf _ + * @category Function + * @param {Function} func The function to restrict. + * @returns {Function} Returns the new restricted function. + * @example + * + * var initialize = _.once(createApplication); + * initialize(); + * initialize(); + * // `initialize` invokes `createApplication` once + */ + function once(func) { + return before(2, func); + } + + /** + * 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 _ + * @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]; + } + var otherArgs = Array(start + 1); + index = -1; + while (++index < start) { + otherArgs[index] = args[index]; + } + otherArgs[start] = array; + return func.apply(this, otherArgs); + }; + } + + /*------------------------------------------------------------------------*/ + + /** + * Creates a shallow clone of `value`. + * + * **Note:** This method is loosely based on the + * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm) + * and supports cloning arrays, array buffers, booleans, date objects, maps, + * numbers, `Object` objects, regexes, sets, strings, symbols, and typed + * arrays. The own enumerable properties of `arguments` objects are cloned + * as plain objects. An empty object is returned for uncloneable values such + * as error objects, functions, DOM nodes, and WeakMaps. + * + * @static + * @memberOf _ + * @category Lang + * @param {*} value The value to clone. + * @returns {*} Returns the cloned value. + * @example + * + * var objects = [{ 'a': 1 }, { 'b': 2 }]; + * + * var shallow = _.clone(objects); + * console.log(shallow[0] === objects[0]); + * // => true + */ + function clone(value) { + if (!isObject(value)) { + return value; + } + return isArray(value) ? copyArray(value) : copyObject(value, keys(value)); + } + + /** + * 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 _ + * @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 greater than `other`. + * + * @static + * @memberOf _ + * @category Lang + * @param {*} value The value to compare. + * @param {*} other The other value to compare. + * @returns {boolean} Returns `true` if `value` is greater than `other`, else `false`. + * @example + * + * _.gt(3, 1); + * // => true + * + * _.gt(3, 3); + * // => false + * + * _.gt(1, 3); + * // => false + */ + function gt(value, other) { + return value > other; + } + + /** + * Checks if `value` is likely an `arguments` object. + * + * @static + * @memberOf _ + * @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 _ + * @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 _ + * @type Function + * @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 && + !(typeof value == 'function' && isFunction(value)) && isLength(getLength(value)); + } + + /** + * This method is like `_.isArrayLike` except that it also checks if `value` + * is an object. + * + * @static + * @memberOf _ + * @type Function + * @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 classified as a boolean primitive or object. + * + * @static + * @memberOf _ + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. + * @example + * + * _.isBoolean(false); + * // => true + * + * _.isBoolean(null); + * // => false + */ + function isBoolean(value) { + return value === true || value === false || + (isObjectLike(value) && objectToString.call(value) == boolTag); + } + + /** + * Checks if `value` is classified as a `Date` object. + * + * @static + * @memberOf _ + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. + * @example + * + * _.isDate(new Date); + * // => true + * + * _.isDate('Mon April 23 2012'); + * // => false + */ + function isDate(value) { + return isObjectLike(value) && objectToString.call(value) == dateTag; + } + + /** + * Checks if `value` is empty. A value is considered empty unless it's an + * `arguments` object, array, string, or jQuery-like collection with a length + * greater than `0` or an object with own enumerable properties. + * + * @static + * @memberOf _ + * @category Lang + * @param {Array|Object|string} value The value to inspect. + * @returns {boolean} Returns `true` if `value` is empty, else `false`. + * @example + * + * _.isEmpty(null); + * // => true + * + * _.isEmpty(true); + * // => true + * + * _.isEmpty(1); + * // => true + * + * _.isEmpty([1, 2, 3]); + * // => false + * + * _.isEmpty({ 'a': 1 }); + * // => false + */ + function isEmpty(value) { + if (isArrayLike(value) && + (isArray(value) || isString(value) || isFunction(value.splice) || isArguments(value))) { + return !value.length; + } + for (var key in value) { + if (hasOwnProperty.call(value, key)) { + return false; + } + } + return true; + } + + /** + * Performs a deep comparison between two values to determine if they are + * equivalent. + * + * **Note:** This method supports comparing arrays, array buffers, booleans, + * date objects, error objects, maps, numbers, `Object` objects, regexes, + * sets, strings, symbols, and typed arrays. `Object` objects are compared + * by their own, not inherited, enumerable properties. Functions and DOM + * nodes are **not** supported. + * + * @static + * @memberOf _ + * @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' }; + * + * _.isEqual(object, other); + * // => true + * + * object === other; + * // => false + */ + function isEqual(value, other) { + return baseIsEqual(value, other); + } + + /** + * Checks if `value` is a finite primitive number. + * + * **Note:** This method is based on [`Number.isFinite`](https://mdn.io/Number/isFinite). + * + * @static + * @memberOf _ + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a finite number, else `false`. + * @example + * + * _.isFinite(3); + * // => true + * + * _.isFinite(Number.MAX_VALUE); + * // => true + * + * _.isFinite(3.14); + * // => true + * + * _.isFinite(Infinity); + * // => false + */ + function isFinite(value) { + return typeof value == 'number' && nativeIsFinite(value); + } + + /** + * Checks if `value` is classified as a `Function` object. + * + * @static + * @memberOf _ + * @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 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 _ + * @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](https://es5.github.io/#x8) of `Object`. + * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`) + * + * @static + * @memberOf _ + * @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 _ + * @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 `NaN`. + * + * **Note:** This method is not the same as [`isNaN`](https://es5.github.io/#x15.1.2.4) + * which returns `true` for `undefined` and other non-numeric values. + * + * @static + * @memberOf _ + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`. + * @example + * + * _.isNaN(NaN); + * // => true + * + * _.isNaN(new Number(NaN)); + * // => true + * + * isNaN(undefined); + * // => true + * + * _.isNaN(undefined); + * // => false + */ + function isNaN(value) { + // An `NaN` primitive is the only value that is not equal to itself. + // Perform the `toStringTag` check first to avoid errors with some ActiveX objects in IE. + return isNumber(value) && value != +value; + } + + /** + * Checks if `value` is `null`. + * + * @static + * @memberOf _ + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is `null`, else `false`. + * @example + * + * _.isNull(null); + * // => true + * + * _.isNull(void 0); + * // => false + */ + function isNull(value) { + return value === null; + } + + /** + * Checks if `value` is classified as a `Number` primitive or object. + * + * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are classified + * as numbers, use the `_.isFinite` method. + * + * @static + * @memberOf _ + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. + * @example + * + * _.isNumber(3); + * // => true + * + * _.isNumber(Number.MIN_VALUE); + * // => true + * + * _.isNumber(Infinity); + * // => true + * + * _.isNumber('3'); + * // => false + */ + function isNumber(value) { + return typeof value == 'number' || + (isObjectLike(value) && objectToString.call(value) == numberTag); + } + + /** + * Checks if `value` is classified as a `RegExp` object. + * + * @static + * @memberOf _ + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. + * @example + * + * _.isRegExp(/abc/); + * // => true + * + * _.isRegExp('/abc/'); + * // => false + */ + function isRegExp(value) { + return isObject(value) && objectToString.call(value) == regexpTag; + } + + /** + * Checks if `value` is classified as a `String` primitive or object. + * + * @static + * @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 `undefined`. + * + * @static + * @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; + } + + /** + * Checks if `value` is less than `other`. + * + * @static + * @memberOf _ + * @category Lang + * @param {*} value The value to compare. + * @param {*} other The other value to compare. + * @returns {boolean} Returns `true` if `value` is less than `other`, else `false`. + * @example + * + * _.lt(1, 3); + * // => true + * + * _.lt(3, 3); + * // => false + * + * _.lt(3, 1); + * // => false + */ + function lt(value, other) { + return value < other; + } + + /** + * Converts `value` to an array. + * + * @static + * @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 (!isArrayLike(value)) { + return values(value); + } + return value.length ? copyArray(value) : []; + } + + /** + * Converts `value` to an integer. + * + * **Note:** This function is loosely based on [`ToInteger`](http://www.ecma-international.org/ecma-262/6.0/#sec-tointeger). + * + * @static + * @memberOf _ + * @category Lang + * @param {*} value The value to convert. + * @returns {number} Returns the converted integer. + * @example + * + * _.toInteger(3); + * // => 3 + * + * _.toInteger(Number.MIN_VALUE); + * // => 0 + * + * _.toInteger(Infinity); + * // => 1.7976931348623157e+308 + * + * _.toInteger('3'); + * // => 3 + */ + var toInteger = Number; + + /** + * Converts `value` to a number. + * + * @static + * @memberOf _ + * @category Lang + * @param {*} value The value to process. + * @returns {number} Returns the number. + * @example + * + * _.toNumber(3); + * // => 3 + * + * _.toNumber(Number.MIN_VALUE); + * // => 5e-324 + * + * _.toNumber(Infinity); + * // => Infinity + * + * _.toNumber('3'); + * // => 3 + */ + var toNumber = Number; + + /** + * Converts `value` to a string if it's not one. An empty string is returned + * for `null` and `undefined` values. The sign of `-0` is preserved. + * + * @static + * @memberOf _ + * @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) { + if (typeof value == 'string') { + return value; + } + return value == null ? '' : (value + ''); + } + + /*------------------------------------------------------------------------*/ + + /** + * Assigns own enumerable properties of source objects to the destination + * object. Source objects are applied from left to right. Subsequent sources + * overwrite property assignments of previous sources. + * + * **Note:** This method mutates `object` and is loosely based on + * [`Object.assign`](https://mdn.io/Object/assign). + * + * @static + * @memberOf _ + * @category Object + * @param {Object} object The destination object. + * @param {...Object} [sources] The source objects. + * @returns {Object} Returns `object`. + * @example + * + * function Foo() { + * this.c = 3; + * } + * + * function Bar() { + * this.e = 5; + * } + * + * Foo.prototype.d = 4; + * Bar.prototype.f = 6; + * + * _.assign({ 'a': 1 }, new Foo, new Bar); + * // => { 'a': 1, 'c': 3, 'e': 5 } + */ + var assign = createAssigner(function(object, source) { + copyObject(source, keys(source), object); + }); + + /** + * This method is like `_.assign` except that it iterates over own and + * inherited source properties. + * + * **Note:** This method mutates `object`. + * + * @static + * @memberOf _ + * @alias extend + * @category Object + * @param {Object} object The destination object. + * @param {...Object} [sources] The source objects. + * @returns {Object} Returns `object`. + * @example + * + * function Foo() { + * this.b = 2; + * } + * + * function Bar() { + * this.d = 4; + * } + * + * Foo.prototype.c = 3; + * Bar.prototype.e = 5; + * + * _.assignIn({ 'a': 1 }, new Foo, new Bar); + * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4, 'e': 5 } + */ + var assignIn = createAssigner(function(object, source) { + copyObject(source, keysIn(source), object); + }); + + /** + * This method is like `_.assignIn` except that it accepts `customizer` which + * is invoked to produce the assigned values. If `customizer` returns `undefined` + * assignment is handled by the method instead. The `customizer` is invoked + * with five arguments: (objValue, srcValue, key, object, source). + * + * **Note:** This method mutates `object`. + * + * @static + * @memberOf _ + * @alias extendWith + * @category Object + * @param {Object} object The destination object. + * @param {...Object} sources The source objects. + * @param {Function} [customizer] The function to customize assigned values. + * @returns {Object} Returns `object`. + * @example + * + * function customizer(objValue, srcValue) { + * return _.isUndefined(objValue) ? srcValue : objValue; + * } + * + * var defaults = _.partialRight(_.assignInWith, customizer); + * + * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 }); + * // => { 'a': 1, 'b': 2 } + */ + var assignInWith = createAssigner(function(object, source, srcIndex, customizer) { + copyObjectWith(source, keysIn(source), object, customizer); + }); + + /** + * Creates an object that inherits from the `prototype` object. If a `properties` + * object is given its own enumerable properties are assigned to the created object. + * + * @static + * @memberOf _ + * @category Object + * @param {Object} prototype The object to inherit from. + * @param {Object} [properties] The properties to assign to the object. + * @returns {Object} Returns the new object. + * @example + * + * function Shape() { + * this.x = 0; + * this.y = 0; + * } + * + * function Circle() { + * Shape.call(this); + * } + * + * Circle.prototype = _.create(Shape.prototype, { + * 'constructor': Circle + * }); + * + * var circle = new Circle; + * circle instanceof Circle; + * // => true + * + * circle instanceof Shape; + * // => true + */ + function create(prototype, properties) { + var result = baseCreate(prototype); + return properties ? assign(result, properties) : result; + } + + /** + * Assigns own and inherited enumerable properties of source objects to the + * destination object for all destination properties that resolve to `undefined`. + * Source objects are applied from left to right. Once a property is set, + * additional values of the same property are ignored. + * + * **Note:** This method mutates `object`. + * + * @static + * @memberOf _ + * @category Object + * @param {Object} object The destination object. + * @param {...Object} [sources] The source objects. + * @returns {Object} Returns `object`. + * @example + * + * _.defaults({ 'user': 'barney' }, { 'age': 36 }, { 'user': 'fred' }); + * // => { 'user': 'barney', 'age': 36 } + */ + var defaults = rest(function(args) { + args.push(undefined, assignInDefaults); + return assignInWith.apply(undefined, args); + }); + + /** + * Checks if `path` is a direct property of `object`. + * + * @static + * @memberOf _ + * @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 = { 'a': { 'b': { 'c': 3 } } }; + * var other = _.create({ 'a': _.create({ 'b': _.create({ 'c': 3 }) }) }); + * + * _.has(object, 'a'); + * // => true + * + * _.has(object, 'a.b.c'); + * // => true + * + * _.has(object, ['a', 'b', 'c']); + * // => true + * + * _.has(other, 'a'); + * // => false + */ + function has(object, path) { + return object != null && hasOwnProperty.call(object, path); + } + + /** + * 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 + * @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 (hasOwnProperty.call(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 _ + * @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; + } + + /** + * Creates an object composed of the picked `object` properties. + * + * @static + * @memberOf _ + * @category Object + * @param {Object} object The source object. + * @param {...(string|string[])} [props] The property names to pick, specified + * individually or in arrays. + * @returns {Object} Returns the new object. + * @example + * + * var object = { 'a': 1, 'b': '2', 'c': 3 }; + * + * _.pick(object, ['a', 'c']); + * // => { 'a': 1, 'c': 3 } + */ + var pick = rest(function(object, props) { + return object == null ? {} : basePick(object, baseFlatten(props)); + }); + + /** + * This method is like `_.get` except that if the resolved value is a function + * it's invoked with the `this` binding of its parent object and its result + * is returned. + * + * @static + * @memberOf _ + * @category Object + * @param {Object} object The object to query. + * @param {Array|string} path The path of the property to resolve. + * @param {*} [defaultValue] The value returned if the resolved value is `undefined`. + * @returns {*} Returns the resolved value. + * @example + * + * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] }; + * + * _.result(object, 'a[0].b.c1'); + * // => 3 + * + * _.result(object, 'a[0].b.c2'); + * // => 4 + * + * _.result(object, 'a[0].b.c3', 'default'); + * // => 'default' + * + * _.result(object, 'a[0].b.c3', _.constant('default')); + * // => 'default' + */ + function result(object, path, defaultValue) { + var value = object == null ? undefined : object[path]; + if (value === undefined) { + value = defaultValue; + } + return isFunction(value) ? value.call(object) : value; + } + + /** + * Creates an array of the own enumerable property values of `object`. + * + * **Note:** Non-object values are coerced to objects. + * + * @static + * @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)) : []; + } + + /*------------------------------------------------------------------------*/ + + /** + * Converts the characters "&", "<", ">", '"', "'", and "\`" in `string` to + * their corresponding HTML entities. + * + * **Note:** No other characters are escaped. To escape additional + * characters use a third-party library like [_he_](https://mths.be/he). + * + * Though the ">" character is escaped for symmetry, characters like + * ">" and "/" don't need escaping in HTML and have no special meaning + * unless they're part of a tag or unquoted attribute value. + * See [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands) + * (under "semi-related fun fact") for more details. + * + * Backticks are escaped because in IE < 9, they can break out of + * attribute values or HTML comments. See [#59](https://html5sec.org/#59), + * [#102](https://html5sec.org/#102), [#108](https://html5sec.org/#108), and + * [#133](https://html5sec.org/#133) of the [HTML5 Security Cheatsheet](https://html5sec.org/) + * for more details. + * + * When working with HTML you should always [quote attribute values](http://wonko.com/post/html-escaping) + * to reduce XSS vectors. + * + * @static + * @memberOf _ + * @category String + * @param {string} [string=''] The string to escape. + * @returns {string} Returns the escaped string. + * @example + * + * _.escape('fred, barney, & pebbles'); + * // => 'fred, barney, & pebbles' + */ + function escape(string) { + string = toString(string); + return (string && reHasUnescapedHtml.test(string)) + ? string.replace(reUnescapedHtml, escapeHtmlChar) + : string; + } + + /*------------------------------------------------------------------------*/ + + /** + * This method returns the first argument given to it. + * + * @static + * @memberOf _ + * @category Util + * @param {*} value Any value. + * @returns {*} Returns `value`. + * @example + * + * var object = { 'user': 'fred' }; + * + * _.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 callback returns the + * property value for a given element. If `func` is an object the created + * callback returns `true` for elements that contain the equivalent object properties, otherwise it returns `false`. + * + * @static + * @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 }, + * { 'user': 'fred', 'age': 40 } + * ]; + * + * // Create custom iteratee shorthands. + * _.iteratee = _.wrap(_.iteratee, function(callback, func) { + * var p = /^(\S+)\s*([<>])\s*(\S+)$/.exec(func); + * return !p ? callback(func) : function(object) { + * return (p[2] == '>' ? object[p[1]] > p[3] : object[p[1]] < p[3]); + * }; + * }); + * + * _.filter(users, 'age > 36'); + * // => [{ 'user': 'fred', 'age': 40 }] + */ + var iteratee = baseIteratee; + + /** + * Creates a function that performs a deep partial comparison between a given + * object and `source`, returning `true` if the given object has equivalent + * property values, else `false`. + * + * **Note:** This method supports comparing the same values as `_.isEqual`. + * + * @static + * @memberOf _ + * @category Util + * @param {Object} source The object of property values to match. + * @returns {Function} Returns the new function. + * @example + * + * var users = [ + * { 'user': 'barney', 'age': 36, 'active': true }, + * { 'user': 'fred', 'age': 40, 'active': false } + * ]; + * + * _.filter(users, _.matches({ 'age': 40, 'active': false })); + * // => [{ 'user': 'fred', 'age': 40, 'active': false }] + */ + function matches(source) { + return baseMatches(assign({}, source)); + } + + /** + * Adds all own enumerable function properties of a source object to the + * destination object. If `object` is a function then methods are added to + * its prototype as well. + * + * **Note:** Use `_.runInContext` to create a pristine `lodash` function to + * avoid conflicts caused by modifying the original. + * + * @static + * @memberOf _ + * @category Util + * @param {Function|Object} [object=lodash] The destination object. + * @param {Object} source The object of functions to add. + * @param {Object} [options] The options object. + * @param {boolean} [options.chain=true] Specify whether the functions added + * are chainable. + * @returns {Function|Object} Returns `object`. + * @example + * + * function vowels(string) { + * return _.filter(string, function(v) { + * return /[aeiou]/i.test(v); + * }); + * } + * + * _.mixin({ 'vowels': vowels }); + * _.vowels('fred'); + * // => ['e'] + * + * _('fred').vowels().value(); + * // => ['e'] + * + * _.mixin({ 'vowels': vowels }, { 'chain': false }); + * _('fred').vowels(); + * // => ['e'] + */ + function mixin(object, source, options) { + var props = keys(source), + methodNames = baseFunctions(source, props); + + if (options == null && + !(isObject(source) && (methodNames.length || !props.length))) { + options = source; + source = object; + object = this; + methodNames = baseFunctions(source, keys(source)); + } + var chain = (isObject(options) && 'chain' in options) ? options.chain : true, + isFunc = isFunction(object); + + baseEach(methodNames, function(methodName) { + var func = source[methodName]; + object[methodName] = func; + if (isFunc) { + object.prototype[methodName] = function() { + var chainAll = this.__chain__; + if (chain || chainAll) { + var result = object(this.__wrapped__), + actions = result.__actions__ = copyArray(this.__actions__); + + actions.push({ 'func': func, 'args': arguments, 'thisArg': object }); + result.__chain__ = chainAll; + return result; + } + return func.apply(object, arrayPush([this.value()], arguments)); + }; + } + }); + + return object; + } + + /** + * Reverts the `_` variable to its previous value and returns a reference to + * the `lodash` function. + * + * @static + * @memberOf _ + * @category Util + * @returns {Function} Returns the `lodash` function. + * @example + * + * var lodash = _.noConflict(); + */ + function noConflict() { + if (root._ === this) { + root._ = oldDash; + } + return this; + } + + /** + * A no-operation function that returns `undefined` regardless of the + * arguments it receives. + * + * @static + * @memberOf _ + * @category Util + * @example + * + * var object = { 'user': 'fred' }; + * + * _.noop(object) === undefined; + * // => true + */ + function noop() { + // No operation performed. + } + + /** + * Generates a unique ID. If `prefix` is given the ID is appended to it. + * + * @static + * @memberOf _ + * @category Util + * @param {string} [prefix] The value to prefix the ID with. + * @returns {string} Returns the unique ID. + * @example + * + * _.uniqueId('contact_'); + * // => 'contact_104' + * + * _.uniqueId(); + * // => '105' + */ + function uniqueId(prefix) { + var id = ++idCounter; + return toString(prefix) + id; + } + + /*------------------------------------------------------------------------*/ + + /** + * Computes the maximum value of `array`. If `array` is empty or falsey + * `undefined` is returned. + * + * @static + * @memberOf _ + * @category Math + * @param {Array} array The array to iterate over. + * @returns {*} Returns the maximum value. + * @example + * + * _.max([4, 2, 8, 6]); + * // => 8 + * + * _.max([]); + * // => undefined + */ + function max(array) { + return (array && array.length) + ? baseExtremum(array, identity, gt) + : undefined; + } + + /** + * Computes the minimum value of `array`. If `array` is empty or falsey + * `undefined` is returned. + * + * @static + * @memberOf _ + * @category Math + * @param {Array} array The array to iterate over. + * @returns {*} Returns the minimum value. + * @example + * + * _.min([4, 2, 8, 6]); + * // => 2 + * + * _.min([]); + * // => undefined + */ + function min(array) { + return (array && array.length) + ? baseExtremum(array, identity, lt) + : undefined; + } + + /*------------------------------------------------------------------------*/ + + LodashWrapper.prototype = baseCreate(lodash.prototype); + LodashWrapper.prototype.constructor = LodashWrapper; + + // Add functions that return wrapped values when chaining. + lodash.assignIn = assignIn; + lodash.before = before; + lodash.bind = bind; + lodash.chain = chain; + lodash.compact = compact; + lodash.concat = concat; + lodash.create = create; + lodash.defaults = defaults; + lodash.defer = defer; + lodash.delay = delay; + lodash.filter = filter; + lodash.flatten = flatten; + lodash.flattenDeep = flattenDeep; + lodash.iteratee = iteratee; + lodash.keys = keys; + lodash.map = map; + lodash.matches = matches; + lodash.mixin = mixin; + lodash.negate = negate; + lodash.once = once; + lodash.pick = pick; + lodash.slice = slice; + lodash.sortBy = sortBy; + lodash.tap = tap; + lodash.thru = thru; + lodash.toArray = toArray; + lodash.values = values; + + // Add aliases. + lodash.extend = assignIn; + + // Add functions to `lodash.prototype`. + mixin(lodash, lodash); + + /*------------------------------------------------------------------------*/ + + // Add functions that return unwrapped values when chaining. + lodash.clone = clone; + lodash.escape = escape; + lodash.every = every; + lodash.find = find; + lodash.forEach = forEach; + lodash.has = has; + lodash.head = head; + lodash.identity = identity; + lodash.indexOf = indexOf; + lodash.isArguments = isArguments; + lodash.isArray = isArray; + lodash.isBoolean = isBoolean; + lodash.isDate = isDate; + lodash.isEmpty = isEmpty; + lodash.isEqual = isEqual; + lodash.isFinite = isFinite; + lodash.isFunction = isFunction; + lodash.isNaN = isNaN; + lodash.isNull = isNull; + lodash.isNumber = isNumber; + lodash.isObject = isObject; + lodash.isRegExp = isRegExp; + lodash.isString = isString; + lodash.isUndefined = isUndefined; + lodash.last = last; + lodash.max = max; + lodash.min = min; + lodash.noConflict = noConflict; + lodash.noop = noop; + lodash.reduce = reduce; + lodash.result = result; + lodash.size = size; + lodash.some = some; + lodash.uniqueId = uniqueId; + + // Add aliases. + lodash.each = forEach; + lodash.first = head; + + mixin(lodash, (function() { + var source = {}; + baseForOwn(lodash, function(func, methodName) { + if (!hasOwnProperty.call(lodash.prototype, methodName)) { + source[methodName] = func; + } + }); + return source; + }()), { 'chain': false }); + + /*------------------------------------------------------------------------*/ + + /** + * The semantic version number. + * + * @static + * @memberOf _ + * @type string + */ + lodash.VERSION = VERSION; + + // Add `Array` and `String` methods to `lodash.prototype`. + baseEach(['pop', 'join', 'replace', 'reverse', 'split', 'push', 'shift', 'sort', 'splice', 'unshift'], function(methodName) { + var func = (/^(?:replace|split)$/.test(methodName) ? String.prototype : arrayProto)[methodName], + chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru', + retUnwrapped = /^(?:pop|join|replace|shift)$/.test(methodName); + + lodash.prototype[methodName] = function() { + var args = arguments; + if (retUnwrapped && !this.__chain__) { + return func.apply(this.value(), args); + } + return this[chainName](function(value) { + return func.apply(value, args); + }); + }; + }); + + // Add chaining functions to the `lodash` wrapper. + lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue; + + /*--------------------------------------------------------------------------*/ + + // Expose lodash on the free variable `window` or `self` when available. This + // prevents errors in cases where lodash is loaded by a script tag in the presence + // of an AMD loader. See http://requirejs.org/docs/errors.html#mismatch for more details. + (freeWindow || freeSelf || {})._ = lodash; + + // Some AMD build optimizers like r.js check for condition patterns like the following: + if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) { + // Define as an anonymous module so, through path mapping, it can be + // referenced as the "underscore" module. + define(function() { + return lodash; + }); + } + // Check for `exports` after `define` in case a build optimizer adds an `exports` object. + else if (freeExports && freeModule) { + // Export for Node.js. + if (moduleExports) { + (freeModule.exports = lodash)._ = lodash; + } + // Export for CommonJS support. + freeExports._ = lodash; + } + else { + // Export to the global object. + root._ = lodash; + } +}.call(this));