time-to-botec

core.js (115957B)

---

 /**
  * @license
  * Lodash (Custom Build) <https://lodash.com/>
  * Build: `lodash core -o ./dist/lodash.core.js`
  * Copyright OpenJS Foundation and other contributors <https://openjsf.org/>
  * Released under MIT license <https://lodash.com/license>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
 ;(function() {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
 
   /** Used as the semantic version number. */
   var VERSION = '4.17.21';
 
   /** Error message constants. */
   var FUNC_ERROR_TEXT = 'Expected a function';
 
   /** Used to compose bitmasks for value comparisons. */
   var COMPARE_PARTIAL_FLAG = 1,
       COMPARE_UNORDERED_FLAG = 2;
 
   /** Used to compose bitmasks for function metadata. */
   var WRAP_BIND_FLAG = 1,
       WRAP_PARTIAL_FLAG = 32;
 
   /** Used as references for various `Number` constants. */
   var INFINITY = 1 / 0,
       MAX_SAFE_INTEGER = 9007199254740991;
 
   /** `Object#toString` result references. */
   var argsTag = '[object Arguments]',
       arrayTag = '[object Array]',
       asyncTag = '[object AsyncFunction]',
       boolTag = '[object Boolean]',
       dateTag = '[object Date]',
       errorTag = '[object Error]',
       funcTag = '[object Function]',
       genTag = '[object GeneratorFunction]',
       numberTag = '[object Number]',
       objectTag = '[object Object]',
       proxyTag = '[object Proxy]',
       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 = {
     '&': '&amp;',
     '<': '&lt;',
     '>': '&gt;',
     '"': '&quot;',
     "'": '&#39;'
   };
 
   /** Detect free variable `global` from Node.js. */
   var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
 
   /** Detect free variable `self`. */
   var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
 
   /** Used as a reference to the global object. */
   var root = freeGlobal || freeSelf || Function('return this')();
 
   /** Detect free variable `exports`. */
   var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;
 
   /** Detect free variable `module`. */
   var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
 
   /*--------------------------------------------------------------------------*/
 
   /**
    * 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) {
     array.push.apply(array, values);
     return array;
   }
 
   /**
    * The base implementation of `_.findIndex` and `_.findLastIndex` without
    * support for iteratee shorthands.
    *
    * @private
    * @param {Array} array The array to inspect.
    * @param {Function} predicate The function invoked per iteration.
    * @param {number} fromIndex The index to search from.
    * @param {boolean} [fromRight] Specify iterating from right to left.
    * @returns {number} Returns the index of the matched value, else `-1`.
    */
   function baseFindIndex(array, predicate, fromIndex, fromRight) {
     var length = array.length,
         index = fromIndex + (fromRight ? 1 : -1);
 
     while ((fromRight ? index-- : ++index < length)) {
       if (predicate(array[index], index, array)) {
         return index;
       }
     }
     return -1;
   }
 
   /**
    * The base implementation of `_.property` without support for deep paths.
    *
    * @private
    * @param {string} key The key of the property to get.
    * @returns {Function} Returns the new accessor function.
    */
   function baseProperty(key) {
     return function(object) {
       return object == null ? undefined : object[key];
     };
   }
 
   /**
    * The base implementation of `_.propertyOf` without support for deep paths.
    *
    * @private
    * @param {Object} object The object to query.
    * @returns {Function} Returns the new accessor function.
    */
   function basePropertyOf(object) {
     return function(key) {
       return object == null ? undefined : object[key];
     };
   }
 
   /**
    * 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 `_.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];
     });
   }
 
   /**
    * Used by `_.escape` to convert characters to HTML entities.
    *
    * @private
    * @param {string} chr The matched character to escape.
    * @returns {string} Returns the escaped character.
    */
   var escapeHtmlChar = basePropertyOf(htmlEscapes);
 
   /**
    * Creates a unary function that invokes `func` with its argument transformed.
    *
    * @private
    * @param {Function} func The function to wrap.
    * @param {Function} transform The argument transform.
    * @returns {Function} Returns the new function.
    */
   function overArg(func, transform) {
     return function(arg) {
       return func(transform(arg));
     };
   }
 
   /*--------------------------------------------------------------------------*/
 
   /** 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-262/7.0/#sec-object.prototype.tostring)
    * of values.
    */
   var nativeObjectToString = objectProto.toString;
 
   /** Used to restore the original `_` reference in `_.noConflict`. */
   var oldDash = root._;
 
   /** Built-in value references. */
   var objectCreate = Object.create,
       propertyIsEnumerable = objectProto.propertyIsEnumerable;
 
   /* Built-in method references for those with the same name as other `lodash` methods. */
   var nativeIsFinite = root.isFinite,
       nativeKeys = overArg(Object.keys, Object),
       nativeMax = Math.max;
 
   /*------------------------------------------------------------------------*/
 
   /**
    * Creates a `lodash` object which wraps `value` to enable implicit method
    * chain sequences. Methods that operate on and return arrays, collections,
    * and functions can be chained together. Methods that retrieve a single value
    * or may return a primitive value will automatically end the chain sequence
    * and return the unwrapped value. Otherwise, the value must be unwrapped
    * with `_#value`.
    *
    * Explicit chain sequences, which must be unwrapped with `_#value`, may be
    * enabled using `_.chain`.
    *
    * The execution of chained methods is lazy, that is, it's deferred until
    * `_#value` is implicitly or explicitly called.
    *
    * Lazy evaluation allows several methods to support shortcut fusion.
    * Shortcut fusion is an optimization to merge iteratee calls; this avoids
    * the creation of intermediate arrays and can greatly reduce the number of
    * iteratee executions. Sections of a chain sequence qualify for shortcut
    * fusion if the section is applied to an array and iteratees accept only
    * one argument. The heuristic for whether a section qualifies for shortcut
    * fusion is subject to change.
    *
    * Chaining is supported in custom builds as long as the `_#value` method is
    * directly or indirectly included in the build.
    *
    * In addition to lodash methods, wrappers have `Array` and `String` methods.
    *
    * The wrapper `Array` methods are:
    * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
    *
    * The wrapper `String` methods are:
    * `replace` and `split`
    *
    * The wrapper methods that support shortcut fusion are:
    * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
    * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
    * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
    *
    * The chainable wrapper methods are:
    * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
    * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
    * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
    * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
    * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
    * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
    * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
    * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
    * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
    * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
    * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
    * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
    * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
    * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
    * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
    * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
    * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
    * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
    * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
    * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
    * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
    * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
    * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
    * `zipObject`, `zipObjectDeep`, and `zipWith`
    *
    * The wrapper methods that are **not** chainable by default are:
    * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
    * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
    * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
    * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
    * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
    * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
    * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
    * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
    * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
    * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,
    * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
    * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
    * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
    * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
    * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
    * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
    * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
    * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
    * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
    * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
    * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
    * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
    * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
    * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
    * `upperFirst`, `value`, and `words`
    *
    * @name _
    * @constructor
    * @category Seq
    * @param {*} value The value to wrap in a `lodash` instance.
    * @returns {Object} Returns the new `lodash` wrapper instance.
    * @example
    *
    * function square(n) {
    *   return n * n;
    * }
    *
    * var wrapped = _([1, 2, 3]);
    *
    * // Returns an unwrapped value.
    * wrapped.reduce(_.add);
    * // => 6
    *
    * // Returns a wrapped value.
    * var squares = wrapped.map(square);
    *
    * _.isArray(squares);
    * // => false
    *
    * _.isArray(squares.value());
    * // => true
    */
   function lodash(value) {
     return value instanceof LodashWrapper
       ? value
       : new LodashWrapper(value);
   }
 
   /**
    * The base implementation of `_.create` without support for assigning
    * properties to the created object.
    *
    * @private
    * @param {Object} proto The object to inherit from.
    * @returns {Object} Returns the new object.
    */
   var baseCreate = (function() {
     function object() {}
     return function(proto) {
       if (!isObject(proto)) {
         return {};
       }
       if (objectCreate) {
         return objectCreate(proto);
       }
       object.prototype = proto;
       var result = new object;
       object.prototype = undefined;
       return result;
     };
   }());
 
   /**
    * The base constructor for creating `lodash` wrapper objects.
    *
    * @private
    * @param {*} value The value to wrap.
    * @param {boolean} [chainAll] Enable explicit method chain sequences.
    */
   function LodashWrapper(value, chainAll) {
     this.__wrapped__ = value;
     this.__actions__ = [];
     this.__chain__ = !!chainAll;
   }
 
   LodashWrapper.prototype = baseCreate(lodash.prototype);
   LodashWrapper.prototype.constructor = LodashWrapper;
 
   /*------------------------------------------------------------------------*/
 
   /**
    * Assigns `value` to `key` of `object` if the existing value is not equivalent
    * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
    * for equality comparisons.
    *
    * @private
    * @param {Object} object The object to modify.
    * @param {string} key The key of the property to assign.
    * @param {*} value The value to assign.
    */
   function assignValue(object, key, value) {
     var objValue = object[key];
     if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
         (value === undefined && !(key in object))) {
       baseAssignValue(object, key, value);
     }
   }
 
   /**
    * The base implementation of `assignValue` and `assignMergeValue` without
    * value checks.
    *
    * @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 baseAssignValue(object, key, value) {
     object[key] = value;
   }
 
   /**
    * The base implementation of `_.delay` and `_.defer` which accepts `args`
    * to provide to `func`.
    *
    * @private
    * @param {Function} func The function to delay.
    * @param {number} wait The number of milliseconds to delay invocation.
    * @param {Array} args The arguments to provide to `func`.
    * @returns {number|Object} Returns the timer id or timeout object.
    */
   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 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 && !false)
             : comparator(current, computed)
           )) {
         var computed = current,
             result = value;
       }
     }
     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 {number} depth The maximum recursion depth.
    * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
    * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
    * @param {Array} [result=[]] The initial result value.
    * @returns {Array} Returns the new flattened array.
    */
   function baseFlatten(array, depth, predicate, isStrict, result) {
     var index = -1,
         length = array.length;
 
     predicate || (predicate = isFlattenable);
     result || (result = []);
 
     while (++index < length) {
       var value = array[index];
       if (depth > 0 && predicate(value)) {
         if (depth > 1) {
           // Recursively flatten arrays (susceptible to call stack limits).
           baseFlatten(value, depth - 1, predicate, isStrict, result);
         } else {
           arrayPush(result, value);
         }
       } else if (!isStrict) {
         result[result.length] = value;
       }
     }
     return result;
   }
 
   /**
    * The base implementation of `baseForOwn` which iterates over `object`
    * properties returned by `keysFunc` and invokes `iteratee` for each property.
    * Iteratee functions may exit iteration early by explicitly returning `false`.
    *
    * @private
    * @param {Object} object The object to iterate over.
    * @param {Function} iteratee The function invoked per iteration.
    * @param {Function} keysFunc The function to get the keys of `object`.
    * @returns {Object} Returns `object`.
    */
   var baseFor = createBaseFor();
 
   /**
    * The base implementation of `_.forOwn` without support for iteratee shorthands.
    *
    * @private
    * @param {Object} object The object to iterate over.
    * @param {Function} iteratee The function invoked per iteration.
    * @returns {Object} Returns `object`.
    */
   function baseForOwn(object, iteratee) {
     return object && baseFor(object, iteratee, keys);
   }
 
   /**
    * The base implementation of `_.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 function names.
    */
   function baseFunctions(object, props) {
     return baseFilter(props, function(key) {
       return isFunction(object[key]);
     });
   }
 
   /**
    * The base implementation of `getTag` without fallbacks for buggy environments.
    *
    * @private
    * @param {*} value The value to query.
    * @returns {string} Returns the `toStringTag`.
    */
   function baseGetTag(value) {
     return objectToString(value);
   }
 
   /**
    * The base implementation of `_.gt` which doesn't coerce arguments.
    *
    * @private
    * @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`.
    */
   function baseGt(value, other) {
     return value > other;
   }
 
   /**
    * The base implementation of `_.isArguments`.
    *
    * @private
    * @param {*} value The value to check.
    * @returns {boolean} Returns `true` if `value` is an `arguments` object,
    */
   var baseIsArguments = noop;
 
   /**
    * The base implementation of `_.isDate` without Node.js optimizations.
    *
    * @private
    * @param {*} value The value to check.
    * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
    */
   function baseIsDate(value) {
     return isObjectLike(value) && baseGetTag(value) == dateTag;
   }
 
   /**
    * 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 {boolean} bitmask The bitmask flags.
    *  1 - Unordered comparison
    *  2 - Partial comparison
    * @param {Function} [customizer] The function to customize comparisons.
    * @param {Object} [stack] Tracks traversed `value` and `other` objects.
    * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
    */
   function baseIsEqual(value, other, bitmask, customizer, stack) {
     if (value === other) {
       return true;
     }
     if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {
       return value !== value && other !== other;
     }
     return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, 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 {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
    * @param {Function} customizer The function to customize comparisons.
    * @param {Function} equalFunc The function to determine equivalents of values.
    * @param {Object} [stack] Tracks traversed `object` and `other` objects.
    * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
    */
   function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
     var objIsArr = isArray(object),
         othIsArr = isArray(other),
         objTag = objIsArr ? arrayTag : baseGetTag(object),
         othTag = othIsArr ? arrayTag : baseGetTag(other);
 
     objTag = objTag == argsTag ? objectTag : objTag;
     othTag = othTag == argsTag ? objectTag : othTag;
 
     var objIsObj = objTag == objectTag,
         othIsObj = othTag == objectTag,
         isSameTag = objTag == othTag;
 
     stack || (stack = []);
     var objStack = find(stack, function(entry) {
       return entry[0] == object;
     });
     var othStack = find(stack, function(entry) {
       return entry[0] == other;
     });
     if (objStack && othStack) {
       return objStack[1] == other;
     }
     stack.push([object, other]);
     stack.push([other, object]);
     if (isSameTag && !objIsObj) {
       var result = (objIsArr)
         ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)
         : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
       stack.pop();
       return result;
     }
     if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
       var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
           othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
 
       if (objIsWrapped || othIsWrapped) {
         var objUnwrapped = objIsWrapped ? object.value() : object,
             othUnwrapped = othIsWrapped ? other.value() : other;
 
         var result = equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
         stack.pop();
         return result;
       }
     }
     if (!isSameTag) {
       return false;
     }
     var result = equalObjects(object, other, bitmask, customizer, equalFunc, stack);
     stack.pop();
     return result;
   }
 
   /**
    * The base implementation of `_.isRegExp` without Node.js optimizations.
    *
    * @private
    * @param {*} value The value to check.
    * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
    */
   function baseIsRegExp(value) {
     return isObjectLike(value) && baseGetTag(value) == regexpTag;
   }
 
   /**
    * The base implementation of `_.iteratee`.
    *
    * @private
    * @param {*} [value=_.identity] The value to convert to an iteratee.
    * @returns {Function} Returns the iteratee.
    */
   function baseIteratee(func) {
     if (typeof func == 'function') {
       return func;
     }
     if (func == null) {
       return identity;
     }
     return (typeof func == 'object' ? baseMatches : baseProperty)(func);
   }
 
   /**
    * The base implementation of `_.lt` which doesn't coerce arguments.
    *
    * @private
    * @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`.
    */
   function baseLt(value, other) {
     return value < other;
   }
 
   /**
    * 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 spec function.
    */
   function baseMatches(source) {
     var props = nativeKeys(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], COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG)
             )) {
           return false;
         }
       }
       return true;
     };
   }
 
   /**
    * The base implementation of `_.pick` without support for individual
    * property identifiers.
    *
    * @private
    * @param {Object} object The source object.
    * @param {string[]} paths The property paths 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 `_.rest` which doesn't validate or coerce arguments.
    *
    * @private
    * @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.
    */
   function baseRest(func, start) {
     return setToString(overRest(func, start, identity), func + '');
   }
 
   /**
    * 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);
   }
 
   /**
    * 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 valIsDefined = value !== undefined,
           valIsNull = value === null,
           valIsReflexive = value === value,
           valIsSymbol = false;
 
       var othIsDefined = other !== undefined,
           othIsNull = other === null,
           othIsReflexive = other === other,
           othIsSymbol = false;
 
       if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) ||
           (valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) ||
           (valIsNull && othIsDefined && othIsReflexive) ||
           (!valIsDefined && othIsReflexive) ||
           !valIsReflexive) {
         return 1;
       }
       if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) ||
           (othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) ||
           (othIsNull && valIsDefined && valIsReflexive) ||
           (!othIsDefined && valIsReflexive) ||
           !othIsReflexive) {
         return -1;
       }
     }
     return 0;
   }
 
   /**
    * Copies properties of `source` to `object`.
    *
    * @private
    * @param {Object} source The object to copy properties from.
    * @param {Array} props The property identifiers to copy.
    * @param {Object} [object={}] The object to copy properties to.
    * @param {Function} [customizer] The function to customize copied values.
    * @returns {Object} Returns `object`.
    */
   function copyObject(source, props, object, customizer) {
     var isNew = !object;
     object || (object = {});
 
     var index = -1,
         length = props.length;
 
     while (++index < length) {
       var key = props[index];
 
       var newValue = customizer
         ? customizer(object[key], source[key], key, object, source)
         : undefined;
 
       if (newValue === undefined) {
         newValue = source[key];
       }
       if (isNew) {
         baseAssignValue(object, key, newValue);
       } else {
         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 baseRest(function(object, sources) {
       var index = -1,
           length = sources.length,
           customizer = length > 1 ? sources[length - 1] : undefined;
 
       customizer = (assigner.length > 3 && 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` and `_.forOwn`.
    *
    * @private
    * @param {boolean} [fromRight] Specify iterating from right to left.
    * @returns {Function} Returns the new base function.
    */
   function createBaseFor(fromRight) {
     return function(object, iteratee, keysFunc) {
       var index = -1,
           iterable = Object(object),
           props = keysFunc(object),
           length = props.length;
 
       while (length--) {
         var key = props[fromRight ? length : ++index];
         if (iteratee(iterable[key], key, iterable) === false) {
           break;
         }
       }
       return object;
     };
   }
 
   /**
    * Creates a 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 createCtor(Ctor) {
     return function() {
       // Use a `switch` statement to work with class constructors. See
       // http://ecma-international.org/ecma-262/7.0/#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 `_.find` or `_.findLast` function.
    *
    * @private
    * @param {Function} findIndexFunc The function to find the collection index.
    * @returns {Function} Returns the new find function.
    */
   function createFind(findIndexFunc) {
     return function(collection, predicate, fromIndex) {
       var iterable = Object(collection);
       if (!isArrayLike(collection)) {
         var iteratee = baseIteratee(predicate, 3);
         collection = keys(collection);
         predicate = function(key) { return iteratee(iterable[key], key, iterable); };
       }
       var index = findIndexFunc(collection, predicate, fromIndex);
       return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined;
     };
   }
 
   /**
    * Creates a function that wraps `func` to invoke it with the `this` binding
    * of `thisArg` and `partials` prepended to the arguments it receives.
    *
    * @private
    * @param {Function} func The function to wrap.
    * @param {number} bitmask The bitmask flags. See `createWrap` 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 createPartial(func, bitmask, thisArg, partials) {
     if (typeof func != 'function') {
       throw new TypeError(FUNC_ERROR_TEXT);
     }
     var isBind = bitmask & WRAP_BIND_FLAG,
         Ctor = createCtor(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 {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
    * @param {Function} customizer The function to customize comparisons.
    * @param {Function} equalFunc The function to determine equivalents of values.
    * @param {Object} stack Tracks traversed `array` and `other` objects.
    * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
    */
   function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
     var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
         arrLength = array.length,
         othLength = other.length;
 
     if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
       return false;
     }
     // Check that cyclic values are equal.
     var arrStacked = stack.get(array);
     var othStacked = stack.get(other);
     if (arrStacked && othStacked) {
       return arrStacked == other && othStacked == array;
     }
     var index = -1,
         result = true,
         seen = (bitmask & COMPARE_UNORDERED_FLAG) ? [] : undefined;
 
     // 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 (seen) {
         if (!baseSome(other, function(othValue, othIndex) {
               if (!indexOf(seen, othIndex) &&
                   (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
                 return seen.push(othIndex);
               }
             })) {
           result = false;
           break;
         }
       } else if (!(
             arrValue === othValue ||
               equalFunc(arrValue, othValue, bitmask, customizer, 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 {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
    * @param {Function} customizer The function to customize comparisons.
    * @param {Function} equalFunc The function to determine equivalents of values.
    * @param {Object} stack Tracks traversed `object` and `other` objects.
    * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
    */
   function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
     switch (tag) {
 
       case boolTag:
       case dateTag:
       case numberTag:
         // Coerce booleans to `1` or `0` and dates to milliseconds.
         // Invalid dates are coerced to `NaN`.
         return eq(+object, +other);
 
       case errorTag:
         return object.name == other.name && object.message == other.message;
 
       case regexpTag:
       case stringTag:
         // Coerce regexes to strings and treat strings, primitives and objects,
         // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
         // 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 {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
    * @param {Function} customizer The function to customize comparisons.
    * @param {Function} equalFunc The function to determine equivalents of values.
    * @param {Object} stack Tracks traversed `object` and `other` objects.
    * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
    */
   function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
     var isPartial = bitmask & COMPARE_PARTIAL_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;
       }
     }
     // Check that cyclic values are equal.
     var objStacked = stack.get(object);
     var othStacked = stack.get(other);
     if (objStacked && othStacked) {
       return objStacked == other && othStacked == object;
     }
     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, bitmask, customizer, 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;
   }
 
   /**
    * A specialized version of `baseRest` which flattens the rest array.
    *
    * @private
    * @param {Function} func The function to apply a rest parameter to.
    * @returns {Function} Returns the new function.
    */
   function flatRest(func) {
     return setToString(overRest(func, undefined, flatten), func + '');
   }
 
   /**
    * Checks if `value` is a flattenable `arguments` object or array.
    *
    * @private
    * @param {*} value The value to check.
    * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
    */
   function isFlattenable(value) {
     return isArray(value) || isArguments(value);
   }
 
   /**
    * Checks if `value` is a valid array-like index.
    *
    * @private
    * @param {*} value The value to check.
    * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
    * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
    */
   function isIndex(value, length) {
     var type = typeof value;
     length = length == null ? MAX_SAFE_INTEGER : length;
 
     return !!length &&
       (type == 'number' ||
         (type != 'symbol' && reIsUint.test(value))) &&
           (value > -1 && value % 1 == 0 && value < length);
   }
 
   /**
    * Checks if the given arguments are from an iteratee call.
    *
    * @private
    * @param {*} value The potential iteratee value argument.
    * @param {*} index The potential iteratee index or key argument.
    * @param {*} object The potential iteratee object argument.
    * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
    *  else `false`.
    */
   function isIterateeCall(value, index, object) {
     if (!isObject(object)) {
       return false;
     }
     var type = typeof index;
     if (type == 'number'
           ? (isArrayLike(object) && isIndex(index, object.length))
           : (type == 'string' && index in object)
         ) {
       return eq(object[index], value);
     }
     return false;
   }
 
   /**
    * This function is like
    * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
    * except that it includes inherited enumerable properties.
    *
    * @private
    * @param {Object} object The object to query.
    * @returns {Array} Returns the array of property names.
    */
   function nativeKeysIn(object) {
     var result = [];
     if (object != null) {
       for (var key in Object(object)) {
         result.push(key);
       }
     }
     return result;
   }
 
   /**
    * Converts `value` to a string using `Object.prototype.toString`.
    *
    * @private
    * @param {*} value The value to convert.
    * @returns {string} Returns the converted string.
    */
   function objectToString(value) {
     return nativeObjectToString.call(value);
   }
 
   /**
    * A specialized version of `baseRest` which transforms the rest array.
    *
    * @private
    * @param {Function} func The function to apply a rest parameter to.
    * @param {number} [start=func.length-1] The start position of the rest parameter.
    * @param {Function} transform The rest array transform.
    * @returns {Function} Returns the new function.
    */
   function overRest(func, start, transform) {
     start = nativeMax(start === undefined ? (func.length - 1) : 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];
       }
       index = -1;
       var otherArgs = Array(start + 1);
       while (++index < start) {
         otherArgs[index] = args[index];
       }
       otherArgs[start] = transform(array);
       return func.apply(this, otherArgs);
     };
   }
 
   /**
    * Sets the `toString` method of `func` to return `string`.
    *
    * @private
    * @param {Function} func The function to modify.
    * @param {Function} string The `toString` result.
    * @returns {Function} Returns `func`.
    */
   var setToString = identity;
 
   /*------------------------------------------------------------------------*/
 
   /**
    * Creates an array with all falsey values removed. The values `false`, `null`,
    * `0`, `""`, `undefined`, and `NaN` are falsey.
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @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 _
    * @since 4.0.0
    * @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]
    */
   function concat() {
     var length = arguments.length;
     if (!length) {
       return [];
     }
     var args = Array(length - 1),
         array = arguments[0],
         index = length;
 
     while (index--) {
       args[index - 1] = arguments[index];
     }
     return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));
   }
 
   /**
    * This method is like `_.find` except that it returns the index of the first
    * element `predicate` returns truthy for instead of the element itself.
    *
    * @static
    * @memberOf _
    * @since 1.1.0
    * @category Array
    * @param {Array} array The array to inspect.
    * @param {Function} [predicate=_.identity] The function invoked per iteration.
    * @param {number} [fromIndex=0] The index to search from.
    * @returns {number} Returns the index of the found element, else `-1`.
    * @example
    *
    * var users = [
    *   { 'user': 'barney',  'active': false },
    *   { 'user': 'fred',    'active': false },
    *   { 'user': 'pebbles', 'active': true }
    * ];
    *
    * _.findIndex(users, function(o) { return o.user == 'barney'; });
    * // => 0
    *
    * // The `_.matches` iteratee shorthand.
    * _.findIndex(users, { 'user': 'fred', 'active': false });
    * // => 1
    *
    * // The `_.matchesProperty` iteratee shorthand.
    * _.findIndex(users, ['active', false]);
    * // => 0
    *
    * // The `_.property` iteratee shorthand.
    * _.findIndex(users, 'active');
    * // => 2
    */
   function findIndex(array, predicate, fromIndex) {
     var length = array == null ? 0 : array.length;
     if (!length) {
       return -1;
     }
     var index = fromIndex == null ? 0 : toInteger(fromIndex);
     if (index < 0) {
       index = nativeMax(length + index, 0);
     }
     return baseFindIndex(array, baseIteratee(predicate, 3), index);
   }
 
   /**
    * Flattens `array` a single level deep.
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @category Array
    * @param {Array} array The array to flatten.
    * @returns {Array} Returns the new flattened array.
    * @example
    *
    * _.flatten([1, [2, [3, [4]], 5]]);
    * // => [1, 2, [3, [4]], 5]
    */
   function flatten(array) {
     var length = array == null ? 0 : array.length;
     return length ? baseFlatten(array, 1) : [];
   }
 
   /**
    * Recursively flattens `array`.
    *
    * @static
    * @memberOf _
    * @since 3.0.0
    * @category Array
    * @param {Array} array The array to flatten.
    * @returns {Array} Returns the new flattened array.
    * @example
    *
    * _.flattenDeep([1, [2, [3, [4]], 5]]);
    * // => [1, 2, 3, 4, 5]
    */
   function flattenDeep(array) {
     var length = array == null ? 0 : array.length;
     return length ? baseFlatten(array, INFINITY) : [];
   }
 
   /**
    * Gets the first element of `array`.
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @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.length) ? array[0] : undefined;
   }
 
   /**
    * Gets the index at which the first occurrence of `value` is found in `array`
    * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
    * for equality comparisons. If `fromIndex` is negative, it's used as the
    * offset from the end of `array`.
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @category Array
    * @param {Array} array The array to inspect.
    * @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 == null ? 0 : array.length;
     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 _
    * @since 0.1.0
    * @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 == null ? 0 : array.length;
     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 _
    * @since 3.0.0
    * @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 == null ? 0 : array.length;
     start = start == null ? 0 : +start;
     end = end === undefined ? length : +end;
     return length ? baseSlice(array, start, end) : [];
   }
 
   /*------------------------------------------------------------------------*/
 
   /**
    * Creates a `lodash` wrapper instance that wraps `value` with explicit method
    * chain sequences enabled. The result of such sequences must be unwrapped
    * with `_#value`.
    *
    * @static
    * @memberOf _
    * @since 1.3.0
    * @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 sequence in order to modify intermediate results.
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @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 sequence.
    *
    * @static
    * @memberOf _
    * @since 3.0.0
    * @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);
   }
 
   /**
    * Creates a `lodash` wrapper instance with explicit method chain sequences enabled.
    *
    * @name chain
    * @memberOf _
    * @since 0.1.0
    * @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 chain sequence to resolve the unwrapped value.
    *
    * @name value
    * @memberOf _
    * @since 0.1.0
    * @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).
    *
    * **Note:** This method returns `true` for
    * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
    * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
    * elements of empty collections.
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @category Collection
    * @param {Array|Object} collection The collection to iterate over.
    * @param {Function} [predicate=_.identity] The function invoked per iteration.
    * @param- {Object} [guard] Enables use as an iteratee for methods 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', 'age': 36, 'active': false },
    *   { 'user': 'fred',   'age': 40, '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).
    *
    * **Note:** Unlike `_.remove`, this method returns a new array.
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @category Collection
    * @param {Array|Object} collection The collection to iterate over.
    * @param {Function} [predicate=_.identity] The function invoked per iteration.
    * @returns {Array} Returns the new filtered array.
    * @see _.reject
    * @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']
    *
    * // Combining several predicates using `_.overEvery` or `_.overSome`.
    * _.filter(users, _.overSome([{ 'age': 36 }, ['age', 40]]));
    * // => objects for ['fred', '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 _
    * @since 0.1.0
    * @category Collection
    * @param {Array|Object} collection The collection to inspect.
    * @param {Function} [predicate=_.identity] The function invoked per iteration.
    * @param {number} [fromIndex=0] The index to search from.
    * @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'
    */
   var find = createFind(findIndex);
 
   /**
    * Iterates over elements of `collection` and invokes `iteratee` for each element.
    * The iteratee is invoked with three arguments: (value, index|key, collection).
    * Iteratee functions may exit iteration early by explicitly returning `false`.
    *
    * **Note:** As with other "Collections" methods, objects with a "length"
    * property are iterated like arrays. To avoid this behavior use `_.forIn`
    * or `_.forOwn` for object iteration.
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @alias each
    * @category Collection
    * @param {Array|Object} collection The collection to iterate over.
    * @param {Function} [iteratee=_.identity] The function invoked per iteration.
    * @returns {Array|Object} Returns `collection`.
    * @see _.forEachRight
    * @example
    *
    * _.forEach([1, 2], 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, baseIteratee(iteratee));
   }
 
   /**
    * Creates an array of values by running each element in `collection` thru
    * `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`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
    * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
    * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
    * `template`, `trim`, `trimEnd`, `trimStart`, and `words`
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @category Collection
    * @param {Array|Object} collection The collection to iterate over.
    * @param {Function} [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` thru `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 _
    * @since 0.1.0
    * @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.
    * @see _.reduceRight
    * @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 string keyed properties for objects.
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @category Collection
    * @param {Array|Object|string} 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 : nativeKeys(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 _
    * @since 0.1.0
    * @category Collection
    * @param {Array|Object} collection The collection to iterate over.
    * @param {Function} [predicate=_.identity] The function invoked per iteration.
    * @param- {Object} [guard] Enables use as an iteratee for methods 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 thru 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 _
    * @since 0.1.0
    * @category Collection
    * @param {Array|Object} collection The collection to iterate over.
    * @param {...(Function|Function[])} [iteratees=[_.identity]]
    *  The iteratees to sort by.
    * @returns {Array} Returns the new sorted array.
    * @example
    *
    * var users = [
    *   { 'user': 'fred',   'age': 48 },
    *   { 'user': 'barney', 'age': 36 },
    *   { 'user': 'fred',   'age': 30 },
    *   { 'user': 'barney', 'age': 34 }
    * ];
    *
    * _.sortBy(users, [function(o) { return o.user; }]);
    * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 30]]
    *
    * _.sortBy(users, ['user', 'age']);
    * // => objects for [['barney', 34], ['barney', 36], ['fred', 30], ['fred', 48]]
    */
   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 _
    * @since 3.0.0
    * @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 `partials` prepended to the arguments it receives.
    *
    * 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 _
    * @since 0.1.0
    * @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
    *
    * function greet(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 = baseRest(function(func, thisArg, partials) {
     return createPartial(func, WRAP_BIND_FLAG | WRAP_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 _
    * @since 0.1.0
    * @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 millisecond.
    */
   var defer = baseRest(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 _
    * @since 0.1.0
    * @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 = baseRest(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 _
    * @since 3.0.0
    * @category Function
    * @param {Function} predicate The predicate to negate.
    * @returns {Function} Returns the new negated 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() {
       var args = arguments;
       return !predicate.apply(this, args);
     };
   }
 
   /**
    * 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 _
    * @since 0.1.0
    * @category Function
    * @param {Function} func The function to restrict.
    * @returns {Function} Returns the new restricted function.
    * @example
    *
    * var initialize = _.once(createApplication);
    * initialize();
    * initialize();
    * // => `createApplication` is invoked once
    */
   function once(func) {
     return before(2, func);
   }
 
   /*------------------------------------------------------------------------*/
 
   /**
    * 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 _
    * @since 0.1.0
    * @category Lang
    * @param {*} value The value to clone.
    * @returns {*} Returns the cloned value.
    * @see _.cloneDeep
    * @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, nativeKeys(value));
   }
 
   /**
    * Performs a
    * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
    * comparison between two values to determine if they are equivalent.
    *
    * @static
    * @memberOf _
    * @since 4.0.0
    * @category Lang
    * @param {*} value The value to compare.
    * @param {*} other The other value to compare.
    * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
    * @example
    *
    * var object = { 'a': 1 };
    * var other = { 'a': 1 };
    *
    * _.eq(object, object);
    * // => true
    *
    * _.eq(object, other);
    * // => false
    *
    * _.eq('a', 'a');
    * // => true
    *
    * _.eq('a', Object('a'));
    * // => false
    *
    * _.eq(NaN, NaN);
    * // => true
    */
   function eq(value, other) {
     return value === other || (value !== value && other !== other);
   }
 
   /**
    * Checks if `value` is likely an `arguments` object.
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @category Lang
    * @param {*} value The value to check.
    * @returns {boolean} Returns `true` if `value` is an `arguments` object,
    *  else `false`.
    * @example
    *
    * _.isArguments(function() { return arguments; }());
    * // => true
    *
    * _.isArguments([1, 2, 3]);
    * // => false
    */
   var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
     return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&
       !propertyIsEnumerable.call(value, 'callee');
   };
 
   /**
    * Checks if `value` is classified as an `Array` object.
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @category Lang
    * @param {*} value The value to check.
    * @returns {boolean} Returns `true` if `value` is an array, else `false`.
    * @example
    *
    * _.isArray([1, 2, 3]);
    * // => true
    *
    * _.isArray(document.body.children);
    * // => false
    *
    * _.isArray('abc');
    * // => false
    *
    * _.isArray(_.noop);
    * // => false
    */
   var isArray = Array.isArray;
 
   /**
    * Checks if `value` is array-like. A value is considered array-like if it's
    * not a function and has a `value.length` that's an integer greater than or
    * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
    *
    * @static
    * @memberOf _
    * @since 4.0.0
    * @category Lang
    * @param {*} value The value to check.
    * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
    * @example
    *
    * _.isArrayLike([1, 2, 3]);
    * // => true
    *
    * _.isArrayLike(document.body.children);
    * // => true
    *
    * _.isArrayLike('abc');
    * // => true
    *
    * _.isArrayLike(_.noop);
    * // => false
    */
   function isArrayLike(value) {
     return value != null && isLength(value.length) && !isFunction(value);
   }
 
   /**
    * Checks if `value` is classified as a boolean primitive or object.
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @category Lang
    * @param {*} value The value to check.
    * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.
    * @example
    *
    * _.isBoolean(false);
    * // => true
    *
    * _.isBoolean(null);
    * // => false
    */
   function isBoolean(value) {
     return value === true || value === false ||
       (isObjectLike(value) && baseGetTag(value) == boolTag);
   }
 
   /**
    * Checks if `value` is classified as a `Date` object.
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @category Lang
    * @param {*} value The value to check.
    * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
    * @example
    *
    * _.isDate(new Date);
    * // => true
    *
    * _.isDate('Mon April 23 2012');
    * // => false
    */
   var isDate = baseIsDate;
 
   /**
    * Checks if `value` is an empty object, collection, map, or set.
    *
    * Objects are considered empty if they have no own enumerable string keyed
    * properties.
    *
    * Array-like values such as `arguments` objects, arrays, buffers, strings, or
    * jQuery-like collections are considered empty if they have a `length` of `0`.
    * Similarly, maps and sets are considered empty if they have a `size` of `0`.
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @category Lang
    * @param {*} value The value to check.
    * @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;
     }
     return !nativeKeys(value).length;
   }
 
   /**
    * 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 compared by strict equality, i.e. `===`.
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @category Lang
    * @param {*} value The value to compare.
    * @param {*} other The other value to compare.
    * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
    * @example
    *
    * var object = { 'a': 1 };
    * var other = { 'a': 1 };
    *
    * _.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 _
    * @since 0.1.0
    * @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.MIN_VALUE);
    * // => true
    *
    * _.isFinite(Infinity);
    * // => false
    *
    * _.isFinite('3');
    * // => false
    */
   function isFinite(value) {
     return typeof value == 'number' && nativeIsFinite(value);
   }
 
   /**
    * Checks if `value` is classified as a `Function` object.
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @category Lang
    * @param {*} value The value to check.
    * @returns {boolean} Returns `true` if `value` is a function, else `false`.
    * @example
    *
    * _.isFunction(_);
    * // => true
    *
    * _.isFunction(/abc/);
    * // => false
    */
   function isFunction(value) {
     if (!isObject(value)) {
       return false;
     }
     // The use of `Object#toString` avoids issues with the `typeof` operator
     // in Safari 9 which returns 'object' for typed arrays and other constructors.
     var tag = baseGetTag(value);
     return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
   }
 
   /**
    * Checks if `value` is a valid array-like length.
    *
    * **Note:** This method is loosely based on
    * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
    *
    * @static
    * @memberOf _
    * @since 4.0.0
    * @category Lang
    * @param {*} value The value to check.
    * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
    * @example
    *
    * _.isLength(3);
    * // => true
    *
    * _.isLength(Number.MIN_VALUE);
    * // => false
    *
    * _.isLength(Infinity);
    * // => false
    *
    * _.isLength('3');
    * // => false
    */
   function isLength(value) {
     return typeof value == 'number' &&
       value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
   }
 
   /**
    * Checks if `value` is the
    * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
    * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @category Lang
    * @param {*} value The value to check.
    * @returns {boolean} Returns `true` if `value` is an object, else `false`.
    * @example
    *
    * _.isObject({});
    * // => true
    *
    * _.isObject([1, 2, 3]);
    * // => true
    *
    * _.isObject(_.noop);
    * // => true
    *
    * _.isObject(null);
    * // => false
    */
   function isObject(value) {
     var type = typeof value;
     return value != null && (type == 'object' || type == 'function');
   }
 
   /**
    * Checks if `value` is object-like. A value is object-like if it's not `null`
    * and has a `typeof` result of "object".
    *
    * @static
    * @memberOf _
    * @since 4.0.0
    * @category Lang
    * @param {*} value The value to check.
    * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
    * @example
    *
    * _.isObjectLike({});
    * // => true
    *
    * _.isObjectLike([1, 2, 3]);
    * // => true
    *
    * _.isObjectLike(_.noop);
    * // => false
    *
    * _.isObjectLike(null);
    * // => false
    */
   function isObjectLike(value) {
     return value != null && typeof value == 'object';
   }
 
   /**
    * Checks if `value` is `NaN`.
    *
    * **Note:** This method is based on
    * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
    * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
    * `undefined` and other non-number values.
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @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 _
    * @since 0.1.0
    * @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 _
    * @since 0.1.0
    * @category Lang
    * @param {*} value The value to check.
    * @returns {boolean} Returns `true` if `value` is a number, 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) && baseGetTag(value) == numberTag);
   }
 
   /**
    * Checks if `value` is classified as a `RegExp` object.
    *
    * @static
    * @memberOf _
    * @since 0.1.0
    * @category Lang
    * @param {*} value The value to check.
    * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
    * @example
    *
    * _.isRegExp(/abc/);
    * // => true
    *
    * _.isRegExp('/abc/');
    * // => false
    */
   var isRegExp = baseIsRegExp;
 
   /**
    * Checks if `value` is classified as a `String` primitive or object.
    *
    * @static
    * @since 0.1.0
    * @memberOf _
    * @category Lang
    * @param {*} value The value to check.
    * @returns {boolean} Returns `true` if `value` is a string, else `false`.
    * @example
    *
    * _.isString('abc');
    * // => true
    *
    * _.isString(1);
    * // => false
    */
   function isString(value) {
     return typeof value == 'string' ||
       (!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag);
   }
 
   /**
    * Checks if `value` is `undefined`.
    *
    * @static
    * @since 0.1.0
    * @memberOf _
    * @category Lang
    * @param {*} value The value to check.
    * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
    * @example
    *
    * _.isUndefined(void 0);
    * // => true
    *
    * _.isUndefined(null);
    * // => false
    */
   function isUndefined(value) {
     return value === undefined;
   }
 
   /**
    * Converts `value` to an array.
    *
    * @static
    * @since 0.1.0
    * @memberOf _
    * @category Lang
    * @param {*} value The value to convert.
    * @returns {Array} Returns the converted array.
    * @example
    *
    * _.toArray({ 'a': 1, 'b': 2 });
    * // => [1, 2]
    *
    * _.toArray('abc');
    * // => ['a', 'b', 'c']
    *
    * _.toArray(1);
    * // => []
    *
    * _.toArray(null);
    * // => []
    */
   function toArray(value) {
     if (!isArrayLike(value)) {
       return values(value);
     }
     return value.length ? copyArray(value) : [];
   }
 
   /**
    * Converts `value` to an integer.
    *
    * **Note:** This method is loosely based on
    * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
    *
    * @static
    * @memberOf _
    * @since 4.0.0
    * @category Lang
    * @param {*} value The value to convert.
    * @returns {number} Returns the converted integer.
    * @example
    *
    * _.toInteger(3.2);
    * // => 3
    *
    * _.toInteger(Number.MIN_VALUE);
    * // => 0
    *
    * _.toInteger(Infinity);
    * // => 1.7976931348623157e+308
    *
    * _.toInteger('3.2');
    * // => 3
    */
   var toInteger = Number;
 
   /**
    * Converts `value` to a number.
    *
    * @static
    * @memberOf _
    * @since 4.0.0
    * @category Lang
    * @param {*} value The value to process.
    * @returns {number} Returns the number.
    * @example
    *
    * _.toNumber(3.2);
    * // => 3.2
    *
    * _.toNumber(Number.MIN_VALUE);
    * // => 5e-324
    *
    * _.toNumber(Infinity);
    * // => Infinity
    *
    * _.toNumber('3.2');
    * // => 3.2
    */
   var toNumber = Number;
 
   /**
    * Converts `value` to a string. An empty string is returned for `null`
    * and `undefined` values. The sign of `-0` is preserved.
    *
    * @static
    * @memberOf _
    * @since 4.0.0
    * @category Lang
    * @param {*} value The value to convert.
    * @returns {string} Returns the converted 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 string keyed 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 _
    * @since 0.10.0
    * @category Object
    * @param {Object} object The destination object.
    * @param {...Object} [sources] The source objects.
    * @returns {Object} Returns `object`.
    * @see _.assignIn
    * @example
    *
    * function Foo() {
    *   this.a = 1;
    * }
    *
    * function Bar() {
    *   this.c = 3;
    * }
    *
    * Foo.prototype.b = 2;
    * Bar.prototype.d = 4;
    *
    * _.assign({ 'a': 0 }, new Foo, new Bar);
    * // => { 'a': 1, 'c': 3 }
    */
   var assign = createAssigner(function(object, source) {
     copyObject(source, nativeKeys(source), object);
   });
 
   /**
    * This method is like `_.assign` except that it iterates over own and
    * inherited source properties.
    *
    * **Note:** This method mutates `object`.
    *
    * @static
    * @memberOf _
    * @since 4.0.0
    * @alias extend
    * @category Object
    * @param {Object} object The destination object.
    * @param {...Object} [sources] The source objects.
    * @returns {Object} Returns `object`.
    * @see _.assign
    * @example
    *
    * function Foo() {
    *   this.a = 1;
    * }
    *
    * function Bar() {
    *   this.c = 3;
    * }
    *
    * Foo.prototype.b = 2;
    * Bar.prototype.d = 4;
    *
    * _.assignIn({ 'a': 0 }, new Foo, new Bar);
    * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
    */
   var assignIn = createAssigner(function(object, source) {
     copyObject(source, nativeKeysIn(source), object);
   });
 
   /**
    * Creates an object that inherits from the `prototype` object. If a
    * `properties` object is given, its own enumerable string keyed properties
    * are assigned to the created object.
    *
    * @static
    * @memberOf _
    * @since 2.3.0
    * @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 == null ? result : assign(result, properties);
   }
 
   /**
    * Assigns own and inherited enumerable string keyed 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
    * @since 0.1.0
    * @memberOf _
    * @category Object
    * @param {Object} object The destination object.
    * @param {...Object} [sources] The source objects.
    * @returns {Object} Returns `object`.
    * @see _.defaultsDeep
    * @example
    *
    * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
    * // => { 'a': 1, 'b': 2 }
    */
   var defaults = baseRest(function(object, sources) {
     object = Object(object);
 
     var index = -1;
     var length = sources.length;
     var guard = length > 2 ? sources[2] : undefined;
 
     if (guard && isIterateeCall(sources[0], sources[1], guard)) {
       length = 1;
     }
 
     while (++index < length) {
       var source = sources[index];
       var props = keysIn(source);
       var propsIndex = -1;
       var propsLength = props.length;
 
       while (++propsIndex < propsLength) {
         var key = props[propsIndex];
         var value = object[key];
 
         if (value === undefined ||
             (eq(value, objectProto[key]) && !hasOwnProperty.call(object, key))) {
           object[key] = source[key];
         }
       }
     }
 
     return object;
   });
 
   /**
    * Checks if `path` is a direct property of `object`.
    *
    * @static
    * @since 0.1.0
    * @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': 2 } };
    * var other = _.create({ 'a': _.create({ 'b': 2 }) });
    *
    * _.has(object, 'a');
    * // => true
    *
    * _.has(object, 'a.b');
    * // => true
    *
    * _.has(object, ['a', 'b']);
    * // => 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-262/7.0/#sec-object.keys)
    * for more details.
    *
    * @static
    * @since 0.1.0
    * @memberOf _
    * @category Object
    * @param {Object} object The object to query.
    * @returns {Array} Returns the array of property names.
    * @example
    *
    * function Foo() {
    *   this.a = 1;
    *   this.b = 2;
    * }
    *
    * Foo.prototype.c = 3;
    *
    * _.keys(new Foo);
    * // => ['a', 'b'] (iteration order is not guaranteed)
    *
    * _.keys('hi');
    * // => ['0', '1']
    */
   var keys = nativeKeys;
 
   /**
    * Creates an array of the own and inherited enumerable property names of `object`.
    *
    * **Note:** Non-object values are coerced to objects.
    *
    * @static
    * @memberOf _
    * @since 3.0.0
    * @category Object
    * @param {Object} object The object to query.
    * @returns {Array} Returns the array of property names.
    * @example
    *
    * function Foo() {
    *   this.a = 1;
    *   this.b = 2;
    * }
    *
    * Foo.prototype.c = 3;
    *
    * _.keysIn(new Foo);
    * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
    */
   var keysIn = nativeKeysIn;
 
   /**
    * Creates an object composed of the picked `object` properties.
    *
    * @static
    * @since 0.1.0
    * @memberOf _
    * @category Object
    * @param {Object} object The source object.
    * @param {...(string|string[])} [paths] The property paths to pick.
    * @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 = flatRest(function(object, paths) {
     return object == null ? {} : basePick(object, paths);
   });
 
   /**
    * 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
    * @since 0.1.0
    * @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 for `undefined` resolved values.
    * @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 string keyed property values of `object`.
    *
    * **Note:** Non-object values are coerced to objects.
    *
    * @static
    * @since 0.1.0
    * @memberOf _
    * @category Object
    * @param {Object} object The object to query.
    * @returns {Array} Returns the array of property values.
    * @example
    *
    * function Foo() {
    *   this.a = 1;
    *   this.b = 2;
    * }
    *
    * Foo.prototype.c = 3;
    *
    * _.values(new Foo);
    * // => [1, 2] (iteration order is not guaranteed)
    *
    * _.values('hi');
    * // => ['h', 'i']
    */
   function values(object) {
     return object == null ? [] : 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.
    *
    * When working with HTML you should always
    * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
    * XSS vectors.
    *
    * @static
    * @since 0.1.0
    * @memberOf _
    * @category String
    * @param {string} [string=''] The string to escape.
    * @returns {string} Returns the escaped string.
    * @example
    *
    * _.escape('fred, barney, & pebbles');
    * // => 'fred, barney, &amp; pebbles'
    */
   function escape(string) {
     string = toString(string);
     return (string && reHasUnescapedHtml.test(string))
       ? string.replace(reUnescapedHtml, escapeHtmlChar)
       : string;
   }
 
   /*------------------------------------------------------------------------*/
 
   /**
    * This method returns the first argument it receives.
    *
    * @static
    * @since 0.1.0
    * @memberOf _
    * @category Util
    * @param {*} value Any value.
    * @returns {*} Returns `value`.
    * @example
    *
    * var object = { 'a': 1 };
    *
    * console.log(_.identity(object) === object);
    * // => true
    */
   function identity(value) {
     return value;
   }
 
   /**
    * Creates a function that invokes `func` with the arguments of the created
    * function. If `func` is a property name, the created function returns the
    * property value for a given element. If `func` is an array or object, the
    * created function returns `true` for elements that contain the equivalent
    * source properties, otherwise it returns `false`.
    *
    * @static
    * @since 4.0.0
    * @memberOf _
    * @category Util
    * @param {*} [func=_.identity] The value to convert to a callback.
    * @returns {Function} Returns the callback.
    * @example
    *
    * var users = [
    *   { 'user': 'barney', 'age': 36, 'active': true },
    *   { 'user': 'fred',   'age': 40, 'active': false }
    * ];
    *
    * // The `_.matches` iteratee shorthand.
    * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
    * // => [{ 'user': 'barney', 'age': 36, 'active': true }]
    *
    * // The `_.matchesProperty` iteratee shorthand.
    * _.filter(users, _.iteratee(['user', 'fred']));
    * // => [{ 'user': 'fred', 'age': 40 }]
    *
    * // The `_.property` iteratee shorthand.
    * _.map(users, _.iteratee('user'));
    * // => ['barney', 'fred']
    *
    * // Create custom iteratee shorthands.
    * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
    *   return !_.isRegExp(func) ? iteratee(func) : function(string) {
    *     return func.test(string);
    *   };
    * });
    *
    * _.filter(['abc', 'def'], /ef/);
    * // => ['def']
    */
   var iteratee = baseIteratee;
 
   /**
    * Creates a function that performs a partial deep comparison between a given
    * object and `source`, returning `true` if the given object has equivalent
    * property values, else `false`.
    *
    * **Note:** The created function is equivalent to `_.isMatch` with `source`
    * partially applied.
    *
    * Partial comparisons will match empty array and empty object `source`
    * values against any array or object value, respectively. See `_.isEqual`
    * for a list of supported value comparisons.
    *
    * **Note:** Multiple values can be checked by combining several matchers
    * using `_.overSome`
    *
    * @static
    * @memberOf _
    * @since 3.0.0
    * @category Util
    * @param {Object} source The object of property values to match.
    * @returns {Function} Returns the new spec function.
    * @example
    *
    * var objects = [
    *   { 'a': 1, 'b': 2, 'c': 3 },
    *   { 'a': 4, 'b': 5, 'c': 6 }
    * ];
    *
    * _.filter(objects, _.matches({ 'a': 4, 'c': 6 }));
    * // => [{ 'a': 4, 'b': 5, 'c': 6 }]
    *
    * // Checking for several possible values
    * _.filter(objects, _.overSome([_.matches({ 'a': 1 }), _.matches({ 'a': 4 })]));
    * // => [{ 'a': 1, 'b': 2, 'c': 3 }, { 'a': 4, 'b': 5, 'c': 6 }]
    */
   function matches(source) {
     return baseMatches(assign({}, source));
   }
 
   /**
    * Adds all own enumerable string keyed 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
    * @since 0.1.0
    * @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 mixins 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,
         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
    * @since 0.1.0
    * @memberOf _
    * @category Util
    * @returns {Function} Returns the `lodash` function.
    * @example
    *
    * var lodash = _.noConflict();
    */
   function noConflict() {
     if (root._ === this) {
       root._ = oldDash;
     }
     return this;
   }
 
   /**
    * This method returns `undefined`.
    *
    * @static
    * @memberOf _
    * @since 2.3.0
    * @category Util
    * @example
    *
    * _.times(2, _.noop);
    * // => [undefined, undefined]
    */
   function noop() {
     // No operation performed.
   }
 
   /**
    * Generates a unique ID. If `prefix` is given, the ID is appended to it.
    *
    * @static
    * @since 0.1.0
    * @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
    * @since 0.1.0
    * @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, baseGt)
       : undefined;
   }
 
   /**
    * Computes the minimum value of `array`. If `array` is empty or falsey,
    * `undefined` is returned.
    *
    * @static
    * @since 0.1.0
    * @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, baseLt)
       : undefined;
   }
 
   /*------------------------------------------------------------------------*/
 
   // Add methods that return wrapped values in chain sequences.
   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 methods to `lodash.prototype`.
   mixin(lodash, lodash);
 
   /*------------------------------------------------------------------------*/
 
   // Add methods that return unwrapped values in chain sequences.
   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` 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__) {
         var value = this.value();
         return func.apply(isArray(value) ? value : [], args);
       }
       return this[chainName](function(value) {
         return func.apply(isArray(value) ? value : [], args);
       });
     };
   });
 
   // Add chain sequence methods to the `lodash` wrapper.
   lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue;
 
   /*--------------------------------------------------------------------------*/
 
   // Some AMD build optimizers, like r.js, check for condition patterns like:
   if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
     // Expose Lodash on the global object to prevent errors when 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.
     // Use `_.noConflict` to remove Lodash from the global object.
     root._ = lodash;
 
     // 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 it.
   else if (freeModule) {
     // Export for Node.js.
     (freeModule.exports = lodash)._ = lodash;
     // Export for CommonJS support.
     freeExports._ = lodash;
   }
   else {
     // Export to the global object.
     root._ = lodash;
   }
 }.call(this));