--- /dev/null
+/**
+ * Lodash (Custom Build) <https://lodash.com/>
+ * Build: `lodash modularize exports="npm" -o ./`
+ * 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
+ */
+
+/** Used as the size to enable large array optimizations. */
+var LARGE_ARRAY_SIZE = 200;
+
+/** Used to stand-in for `undefined` hash values. */
+var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+/** Used to detect hot functions by number of calls within a span of milliseconds. */
+var HOT_COUNT = 800,
+ HOT_SPAN = 16;
+
+/** Used as references for various `Number` constants. */
+var 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]',
+ mapTag = '[object Map]',
+ numberTag = '[object Number]',
+ nullTag = '[object Null]',
+ objectTag = '[object Object]',
+ proxyTag = '[object Proxy]',
+ regexpTag = '[object RegExp]',
+ setTag = '[object Set]',
+ stringTag = '[object String]',
+ undefinedTag = '[object Undefined]',
+ weakMapTag = '[object WeakMap]';
+
+var arrayBufferTag = '[object ArrayBuffer]',
+ dataViewTag = '[object DataView]',
+ float32Tag = '[object Float32Array]',
+ float64Tag = '[object Float64Array]',
+ int8Tag = '[object Int8Array]',
+ int16Tag = '[object Int16Array]',
+ int32Tag = '[object Int32Array]',
+ uint8Tag = '[object Uint8Array]',
+ uint8ClampedTag = '[object Uint8ClampedArray]',
+ uint16Tag = '[object Uint16Array]',
+ uint32Tag = '[object Uint32Array]';
+
+/**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
+ */
+var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
+
+/** Used to detect host constructors (Safari). */
+var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/** Used to identify `toStringTag` values of typed arrays. */
+var typedArrayTags = {};
+typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+typedArrayTags[uint32Tag] = true;
+typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+typedArrayTags[setTag] = typedArrayTags[stringTag] =
+typedArrayTags[weakMapTag] = false;
+
+/** 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;
+
+/** Detect the popular CommonJS extension `module.exports`. */
+var moduleExports = freeModule && freeModule.exports === freeExports;
+
+/** Detect free variable `process` from Node.js. */
+var freeProcess = moduleExports && freeGlobal.process;
+
+/** Used to access faster Node.js helpers. */
+var nodeUtil = (function() {
+ try {
+ // Use `util.types` for Node.js 10+.
+ var types = freeModule && freeModule.require && freeModule.require('util').types;
+
+ if (types) {
+ return types;
+ }
+
+ // Legacy `process.binding('util')` for Node.js < 10.
+ return freeProcess && freeProcess.binding && freeProcess.binding('util');
+ } catch (e) {}
+}());
+
+/* Node.js helper references. */
+var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+/**
+ * A faster alternative to `Function#apply`, this function invokes `func`
+ * with the `this` binding of `thisArg` and the arguments of `args`.
+ *
+ * @private
+ * @param {Function} func The function to invoke.
+ * @param {*} thisArg The `this` binding of `func`.
+ * @param {Array} args The arguments to invoke `func` with.
+ * @returns {*} Returns the result of `func`.
+ */
+function apply(func, thisArg, args) {
+ switch (args.length) {
+ case 0: return func.call(thisArg);
+ case 1: return func.call(thisArg, args[0]);
+ case 2: return func.call(thisArg, args[0], args[1]);
+ case 3: return func.call(thisArg, args[0], args[1], args[2]);
+ }
+ return func.apply(thisArg, args);
+}
+
+/**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+function baseTimes(n, iteratee) {
+ var index = -1,
+ result = Array(n);
+
+ while (++index < n) {
+ result[index] = iteratee(index);
+ }
+ return result;
+}
+
+/**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+function baseUnary(func) {
+ return function(value) {
+ return func(value);
+ };
+}
+
+/**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function getValue(object, key) {
+ return object == null ? undefined : object[key];
+}
+
+/**
+ * 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,
+ funcProto = Function.prototype,
+ objectProto = Object.prototype;
+
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to resolve the decompiled source of functions. */
+var funcToString = funcProto.toString;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+ var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+ return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
+/**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var nativeObjectToString = objectProto.toString;
+
+/** Used to infer the `Object` constructor. */
+var objectCtorString = funcToString.call(Object);
+
+/** Used to detect if a method is native. */
+var reIsNative = RegExp('^' +
+ funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+ .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+);
+
+/** Built-in value references. */
+var Buffer = moduleExports ? root.Buffer : undefined,
+ Symbol = root.Symbol,
+ Uint8Array = root.Uint8Array,
+ allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined,
+ getPrototype = overArg(Object.getPrototypeOf, Object),
+ objectCreate = Object.create,
+ propertyIsEnumerable = objectProto.propertyIsEnumerable,
+ splice = arrayProto.splice,
+ symToStringTag = Symbol ? Symbol.toStringTag : undefined;
+
+var defineProperty = (function() {
+ try {
+ var func = getNative(Object, 'defineProperty');
+ func({}, '', {});
+ return func;
+ } catch (e) {}
+}());
+
+/* Built-in method references for those with the same name as other `lodash` methods. */
+var nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
+ nativeMax = Math.max,
+ nativeNow = Date.now;
+
+/* Built-in method references that are verified to be native. */
+var Map = getNative(root, 'Map'),
+ nativeCreate = getNative(Object, 'create');
+
+/**
+ * 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;
+ };
+}());
+
+/**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Hash(entries) {
+ var index = -1,
+ length = entries == null ? 0 : entries.length;
+
+ this.clear();
+ while (++index < length) {
+ var entry = entries[index];
+ this.set(entry[0], entry[1]);
+ }
+}
+
+/**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+function hashClear() {
+ this.__data__ = nativeCreate ? nativeCreate(null) : {};
+ this.size = 0;
+}
+
+/**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function hashDelete(key) {
+ var result = this.has(key) && delete this.__data__[key];
+ this.size -= result ? 1 : 0;
+ return result;
+}
+
+/**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function hashGet(key) {
+ var data = this.__data__;
+ if (nativeCreate) {
+ var result = data[key];
+ return result === HASH_UNDEFINED ? undefined : result;
+ }
+ return hasOwnProperty.call(data, key) ? data[key] : undefined;
+}
+
+/**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function hashHas(key) {
+ var data = this.__data__;
+ return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);
+}
+
+/**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+function hashSet(key, value) {
+ var data = this.__data__;
+ this.size += this.has(key) ? 0 : 1;
+ data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+ return this;
+}
+
+// Add methods to `Hash`.
+Hash.prototype.clear = hashClear;
+Hash.prototype['delete'] = hashDelete;
+Hash.prototype.get = hashGet;
+Hash.prototype.has = hashHas;
+Hash.prototype.set = hashSet;
+
+/**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function ListCache(entries) {
+ var index = -1,
+ length = entries == null ? 0 : entries.length;
+
+ this.clear();
+ while (++index < length) {
+ var entry = entries[index];
+ this.set(entry[0], entry[1]);
+ }
+}
+
+/**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+function listCacheClear() {
+ this.__data__ = [];
+ this.size = 0;
+}
+
+/**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function listCacheDelete(key) {
+ var data = this.__data__,
+ index = assocIndexOf(data, key);
+
+ if (index < 0) {
+ return false;
+ }
+ var lastIndex = data.length - 1;
+ if (index == lastIndex) {
+ data.pop();
+ } else {
+ splice.call(data, index, 1);
+ }
+ --this.size;
+ return true;
+}
+
+/**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function listCacheGet(key) {
+ var data = this.__data__,
+ index = assocIndexOf(data, key);
+
+ return index < 0 ? undefined : data[index][1];
+}
+
+/**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function listCacheHas(key) {
+ return assocIndexOf(this.__data__, key) > -1;
+}
+
+/**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+function listCacheSet(key, value) {
+ var data = this.__data__,
+ index = assocIndexOf(data, key);
+
+ if (index < 0) {
+ ++this.size;
+ data.push([key, value]);
+ } else {
+ data[index][1] = value;
+ }
+ return this;
+}
+
+// Add methods to `ListCache`.
+ListCache.prototype.clear = listCacheClear;
+ListCache.prototype['delete'] = listCacheDelete;
+ListCache.prototype.get = listCacheGet;
+ListCache.prototype.has = listCacheHas;
+ListCache.prototype.set = listCacheSet;
+
+/**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function MapCache(entries) {
+ var index = -1,
+ length = entries == null ? 0 : entries.length;
+
+ this.clear();
+ while (++index < length) {
+ var entry = entries[index];
+ this.set(entry[0], entry[1]);
+ }
+}
+
+/**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+function mapCacheClear() {
+ this.size = 0;
+ this.__data__ = {
+ 'hash': new Hash,
+ 'map': new (Map || ListCache),
+ 'string': new Hash
+ };
+}
+
+/**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function mapCacheDelete(key) {
+ var result = getMapData(this, key)['delete'](key);
+ this.size -= result ? 1 : 0;
+ return result;
+}
+
+/**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function mapCacheGet(key) {
+ return getMapData(this, key).get(key);
+}
+
+/**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function mapCacheHas(key) {
+ return getMapData(this, key).has(key);
+}
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+function mapCacheSet(key, value) {
+ var data = getMapData(this, key),
+ size = data.size;
+
+ data.set(key, value);
+ this.size += data.size == size ? 0 : 1;
+ return this;
+}
+
+// Add methods to `MapCache`.
+MapCache.prototype.clear = mapCacheClear;
+MapCache.prototype['delete'] = mapCacheDelete;
+MapCache.prototype.get = mapCacheGet;
+MapCache.prototype.has = mapCacheHas;
+MapCache.prototype.set = mapCacheSet;
+
+/**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+function Stack(entries) {
+ var data = this.__data__ = new ListCache(entries);
+ this.size = data.size;
+}
+
+/**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+function stackClear() {
+ this.__data__ = new ListCache;
+ this.size = 0;
+}
+
+/**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+function stackDelete(key) {
+ var data = this.__data__,
+ result = data['delete'](key);
+
+ this.size = data.size;
+ return result;
+}
+
+/**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+function stackGet(key) {
+ return this.__data__.get(key);
+}
+
+/**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+function stackHas(key) {
+ return this.__data__.has(key);
+}
+
+/**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+function stackSet(key, value) {
+ var data = this.__data__;
+ if (data instanceof ListCache) {
+ var pairs = data.__data__;
+ if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+ pairs.push([key, value]);
+ this.size = ++data.size;
+ return this;
+ }
+ data = this.__data__ = new MapCache(pairs);
+ }
+ data.set(key, value);
+ this.size = data.size;
+ return this;
+}
+
+// Add methods to `Stack`.
+Stack.prototype.clear = stackClear;
+Stack.prototype['delete'] = stackDelete;
+Stack.prototype.get = stackGet;
+Stack.prototype.has = stackHas;
+Stack.prototype.set = stackSet;
+
+/**
+ * Creates an array of the enumerable property names of the array-like `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @param {boolean} inherited Specify returning inherited property names.
+ * @returns {Array} Returns the array of property names.
+ */
+function arrayLikeKeys(value, inherited) {
+ var isArr = isArray(value),
+ isArg = !isArr && isArguments(value),
+ isBuff = !isArr && !isArg && isBuffer(value),
+ isType = !isArr && !isArg && !isBuff && isTypedArray(value),
+ skipIndexes = isArr || isArg || isBuff || isType,
+ result = skipIndexes ? baseTimes(value.length, String) : [],
+ length = result.length;
+
+ for (var key in value) {
+ if ((inherited || hasOwnProperty.call(value, key)) &&
+ !(skipIndexes && (
+ // Safari 9 has enumerable `arguments.length` in strict mode.
+ key == 'length' ||
+ // Node.js 0.10 has enumerable non-index properties on buffers.
+ (isBuff && (key == 'offset' || key == 'parent')) ||
+ // PhantomJS 2 has enumerable non-index properties on typed arrays.
+ (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
+ // Skip index properties.
+ isIndex(key, length)
+ ))) {
+ result.push(key);
+ }
+ }
+ return result;
+}
+
+/**
+ * This function is like `assignValue` except that it doesn't assign
+ * `undefined` values.
+ *
+ * @private
+ * @param {Object} object The object to modify.
+ * @param {string} key The key of the property to assign.
+ * @param {*} value The value to assign.
+ */
+function assignMergeValue(object, key, value) {
+ if ((value !== undefined && !eq(object[key], value)) ||
+ (value === undefined && !(key in object))) {
+ baseAssignValue(object, key, value);
+ }
+}
+
+/**
+ * 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);
+ }
+}
+
+/**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to inspect.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+function assocIndexOf(array, key) {
+ var length = array.length;
+ while (length--) {
+ if (eq(array[length][0], key)) {
+ return length;
+ }
+ }
+ return -1;
+}
+
+/**
+ * The base implementation of `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) {
+ if (key == '__proto__' && defineProperty) {
+ defineProperty(object, key, {
+ 'configurable': true,
+ 'enumerable': true,
+ 'value': value,
+ 'writable': true
+ });
+ } else {
+ object[key] = value;
+ }
+}
+
+/**
+ * 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 `getTag` without fallbacks for buggy environments.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+function baseGetTag(value) {
+ if (value == null) {
+ return value === undefined ? undefinedTag : nullTag;
+ }
+ return (symToStringTag && symToStringTag in Object(value))
+ ? getRawTag(value)
+ : objectToString(value);
+}
+
+/**
+ * The base implementation of `_.isArguments`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ */
+function baseIsArguments(value) {
+ return isObjectLike(value) && baseGetTag(value) == argsTag;
+}
+
+/**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ * else `false`.
+ */
+function baseIsNative(value) {
+ if (!isObject(value) || isMasked(value)) {
+ return false;
+ }
+ var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
+ return pattern.test(toSource(value));
+}
+
+/**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+function baseIsTypedArray(value) {
+ return isObjectLike(value) &&
+ isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
+}
+
+/**
+ * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+function baseKeysIn(object) {
+ if (!isObject(object)) {
+ return nativeKeysIn(object);
+ }
+ var isProto = isPrototype(object),
+ result = [];
+
+ for (var key in object) {
+ if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
+ result.push(key);
+ }
+ }
+ return result;
+}
+
+/**
+ * The base implementation of `_.merge` without support for multiple sources.
+ *
+ * @private
+ * @param {Object} object The destination object.
+ * @param {Object} source The source object.
+ * @param {number} srcIndex The index of `source`.
+ * @param {Function} [customizer] The function to customize merged values.
+ * @param {Object} [stack] Tracks traversed source values and their merged
+ * counterparts.
+ */
+function baseMerge(object, source, srcIndex, customizer, stack) {
+ if (object === source) {
+ return;
+ }
+ baseFor(source, function(srcValue, key) {
+ stack || (stack = new Stack);
+ if (isObject(srcValue)) {
+ baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
+ }
+ else {
+ var newValue = customizer
+ ? customizer(safeGet(object, key), srcValue, (key + ''), object, source, stack)
+ : undefined;
+
+ if (newValue === undefined) {
+ newValue = srcValue;
+ }
+ assignMergeValue(object, key, newValue);
+ }
+ }, keysIn);
+}
+
+/**
+ * A specialized version of `baseMerge` for arrays and objects which performs
+ * deep merges and tracks traversed objects enabling objects with circular
+ * references to be merged.
+ *
+ * @private
+ * @param {Object} object The destination object.
+ * @param {Object} source The source object.
+ * @param {string} key The key of the value to merge.
+ * @param {number} srcIndex The index of `source`.
+ * @param {Function} mergeFunc The function to merge values.
+ * @param {Function} [customizer] The function to customize assigned values.
+ * @param {Object} [stack] Tracks traversed source values and their merged
+ * counterparts.
+ */
+function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
+ var objValue = safeGet(object, key),
+ srcValue = safeGet(source, key),
+ stacked = stack.get(srcValue);
+
+ if (stacked) {
+ assignMergeValue(object, key, stacked);
+ return;
+ }
+ var newValue = customizer
+ ? customizer(objValue, srcValue, (key + ''), object, source, stack)
+ : undefined;
+
+ var isCommon = newValue === undefined;
+
+ if (isCommon) {
+ var isArr = isArray(srcValue),
+ isBuff = !isArr && isBuffer(srcValue),
+ isTyped = !isArr && !isBuff && isTypedArray(srcValue);
+
+ newValue = srcValue;
+ if (isArr || isBuff || isTyped) {
+ if (isArray(objValue)) {
+ newValue = objValue;
+ }
+ else if (isArrayLikeObject(objValue)) {
+ newValue = copyArray(objValue);
+ }
+ else if (isBuff) {
+ isCommon = false;
+ newValue = cloneBuffer(srcValue, true);
+ }
+ else if (isTyped) {
+ isCommon = false;
+ newValue = cloneTypedArray(srcValue, true);
+ }
+ else {
+ newValue = [];
+ }
+ }
+ else if (isPlainObject(srcValue) || isArguments(srcValue)) {
+ newValue = objValue;
+ if (isArguments(objValue)) {
+ newValue = toPlainObject(objValue);
+ }
+ else if (!isObject(objValue) || isFunction(objValue)) {
+ newValue = initCloneObject(srcValue);
+ }
+ }
+ else {
+ isCommon = false;
+ }
+ }
+ if (isCommon) {
+ // Recursively merge objects and arrays (susceptible to call stack limits).
+ stack.set(srcValue, newValue);
+ mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
+ stack['delete'](srcValue);
+ }
+ assignMergeValue(object, key, newValue);
+}
+
+/**
+ * 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 `setToString` without support for hot loop shorting.
+ *
+ * @private
+ * @param {Function} func The function to modify.
+ * @param {Function} string The `toString` result.
+ * @returns {Function} Returns `func`.
+ */
+var baseSetToString = !defineProperty ? identity : function(func, string) {
+ return defineProperty(func, 'toString', {
+ 'configurable': true,
+ 'enumerable': false,
+ 'value': constant(string),
+ 'writable': true
+ });
+};
+
+/**
+ * Creates a clone of `buffer`.
+ *
+ * @private
+ * @param {Buffer} buffer The buffer to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Buffer} Returns the cloned buffer.
+ */
+function cloneBuffer(buffer, isDeep) {
+ if (isDeep) {
+ return buffer.slice();
+ }
+ var length = buffer.length,
+ result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);
+
+ buffer.copy(result);
+ return result;
+}
+
+/**
+ * Creates a clone of `arrayBuffer`.
+ *
+ * @private
+ * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
+ * @returns {ArrayBuffer} Returns the cloned array buffer.
+ */
+function cloneArrayBuffer(arrayBuffer) {
+ var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
+ new Uint8Array(result).set(new Uint8Array(arrayBuffer));
+ return result;
+}
+
+/**
+ * Creates a clone of `typedArray`.
+ *
+ * @private
+ * @param {Object} typedArray The typed array to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned typed array.
+ */
+function cloneTypedArray(typedArray, isDeep) {
+ var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
+ return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
+}
+
+/**
+ * Copies the values of `source` to `array`.
+ *
+ * @private
+ * @param {Array} source The array to copy values from.
+ * @param {Array} [array=[]] The array to copy values to.
+ * @returns {Array} Returns `array`.
+ */
+function copyArray(source, array) {
+ var index = -1,
+ length = source.length;
+
+ array || (array = Array(length));
+ while (++index < length) {
+ array[index] = source[index];
+ }
+ return array;
+}
+
+/**
+ * Copies properties of `source` to `object`.
+ *
+ * @private
+ * @param {Object} source The object to copy properties from.
+ * @param {Array} props The property identifiers to copy.
+ * @param {Object} [object={}] The object to copy properties to.
+ * @param {Function} [customizer] The function to customize copied values.
+ * @returns {Object} Returns `object`.
+ */
+function copyObject(source, props, object, customizer) {
+ 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,
+ guard = length > 2 ? sources[2] : undefined;
+
+ customizer = (assigner.length > 3 && typeof customizer == 'function')
+ ? (length--, customizer)
+ : undefined;
+
+ if (guard && isIterateeCall(sources[0], sources[1], guard)) {
+ customizer = length < 3 ? undefined : customizer;
+ length = 1;
+ }
+ object = Object(object);
+ while (++index < length) {
+ var source = sources[index];
+ if (source) {
+ assigner(object, source, index, customizer);
+ }
+ }
+ return object;
+ });
+}
+
+/**
+ * Creates a 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;
+ };
+}
+
+/**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+function getMapData(map, key) {
+ var data = map.__data__;
+ return isKeyable(key)
+ ? data[typeof key == 'string' ? 'string' : 'hash']
+ : data.map;
+}
+
+/**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+function getNative(object, key) {
+ var value = getValue(object, key);
+ return baseIsNative(value) ? value : undefined;
+}
+
+/**
+ * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the raw `toStringTag`.
+ */
+function getRawTag(value) {
+ var isOwn = hasOwnProperty.call(value, symToStringTag),
+ tag = value[symToStringTag];
+
+ try {
+ value[symToStringTag] = undefined;
+ var unmasked = true;
+ } catch (e) {}
+
+ var result = nativeObjectToString.call(value);
+ if (unmasked) {
+ if (isOwn) {
+ value[symToStringTag] = tag;
+ } else {
+ delete value[symToStringTag];
+ }
+ }
+ return result;
+}
+
+/**
+ * Initializes an object clone.
+ *
+ * @private
+ * @param {Object} object The object to clone.
+ * @returns {Object} Returns the initialized clone.
+ */
+function initCloneObject(object) {
+ return (typeof object.constructor == 'function' && !isPrototype(object))
+ ? baseCreate(getPrototype(object))
+ : {};
+}
+
+/**
+ * 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;
+}
+
+/**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+function isKeyable(value) {
+ var type = typeof value;
+ return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+ ? (value !== '__proto__')
+ : (value === null);
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+ return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+function isPrototype(value) {
+ var Ctor = value && value.constructor,
+ proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+ return value === proto;
+}
+
+/**
+ * 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 apply(func, this, otherArgs);
+ };
+}
+
+/**
+ * Gets the value at `key`, unless `key` is "__proto__" or "constructor".
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+function safeGet(object, key) {
+ if (key === 'constructor' && typeof object[key] === 'function') {
+ return;
+ }
+
+ if (key == '__proto__') {
+ return;
+ }
+
+ return object[key];
+}
+
+/**
+ * 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 = shortOut(baseSetToString);
+
+/**
+ * Creates a function that'll short out and invoke `identity` instead
+ * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
+ * milliseconds.
+ *
+ * @private
+ * @param {Function} func The function to restrict.
+ * @returns {Function} Returns the new shortable function.
+ */
+function shortOut(func) {
+ var count = 0,
+ lastCalled = 0;
+
+ return function() {
+ var stamp = nativeNow(),
+ remaining = HOT_SPAN - (stamp - lastCalled);
+
+ lastCalled = stamp;
+ if (remaining > 0) {
+ if (++count >= HOT_COUNT) {
+ return arguments[0];
+ }
+ } else {
+ count = 0;
+ }
+ return func.apply(undefined, arguments);
+ };
+}
+
+/**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to convert.
+ * @returns {string} Returns the source code.
+ */
+function toSource(func) {
+ if (func != null) {
+ try {
+ return funcToString.call(func);
+ } catch (e) {}
+ try {
+ return (func + '');
+ } catch (e) {}
+ }
+ return '';
+}
+
+/**
+ * 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);
+}
+
+/**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ * else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+function isArrayLikeObject(value) {
+ return isObjectLike(value) && isArrayLike(value);
+}
+
+/**
+ * Checks if `value` is a buffer.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.3.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
+ * @example
+ *
+ * _.isBuffer(new Buffer(2));
+ * // => true
+ *
+ * _.isBuffer(new Uint8Array(2));
+ * // => false
+ */
+var isBuffer = nativeIsBuffer || stubFalse;
+
+/**
+ * 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 a plain object, that is, an object created by the
+ * `Object` constructor or one with a `[[Prototype]]` of `null`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.8.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
+ * @example
+ *
+ * function Foo() {
+ * this.a = 1;
+ * }
+ *
+ * _.isPlainObject(new Foo);
+ * // => false
+ *
+ * _.isPlainObject([1, 2, 3]);
+ * // => false
+ *
+ * _.isPlainObject({ 'x': 0, 'y': 0 });
+ * // => true
+ *
+ * _.isPlainObject(Object.create(null));
+ * // => true
+ */
+function isPlainObject(value) {
+ if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
+ return false;
+ }
+ var proto = getPrototype(value);
+ if (proto === null) {
+ return true;
+ }
+ var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
+ return typeof Ctor == 'function' && Ctor instanceof Ctor &&
+ funcToString.call(Ctor) == objectCtorString;
+}
+
+/**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+/**
+ * Converts `value` to a plain object flattening inherited enumerable string
+ * keyed properties of `value` to own properties of the plain object.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {Object} Returns the converted plain object.
+ * @example
+ *
+ * function Foo() {
+ * this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.assign({ 'a': 1 }, new Foo);
+ * // => { 'a': 1, 'b': 2 }
+ *
+ * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
+ * // => { 'a': 1, 'b': 2, 'c': 3 }
+ */
+function toPlainObject(value) {
+ return copyObject(value, keysIn(value));
+}
+
+/**
+ * Creates an array of the own and inherited enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ * this.a = 1;
+ * this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keysIn(new Foo);
+ * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
+ */
+function keysIn(object) {
+ return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);
+}
+
+/**
+ * This method is like `_.assign` except that it recursively merges own and
+ * inherited enumerable string keyed properties of source objects into the
+ * destination object. Source properties that resolve to `undefined` are
+ * skipped if a destination value exists. Array and plain object properties
+ * are merged recursively. Other objects and value types are overridden by
+ * assignment. Source objects are applied from left to right. Subsequent
+ * sources overwrite property assignments of previous sources.
+ *
+ * **Note:** This method mutates `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.5.0
+ * @category Object
+ * @param {Object} object The destination object.
+ * @param {...Object} [sources] The source objects.
+ * @returns {Object} Returns `object`.
+ * @example
+ *
+ * var object = {
+ * 'a': [{ 'b': 2 }, { 'd': 4 }]
+ * };
+ *
+ * var other = {
+ * 'a': [{ 'c': 3 }, { 'e': 5 }]
+ * };
+ *
+ * _.merge(object, other);
+ * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
+ */
+var merge = createAssigner(function(object, source, srcIndex) {
+ baseMerge(object, source, srcIndex);
+});
+
+/**
+ * Creates a function that returns `value`.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Util
+ * @param {*} value The value to return from the new function.
+ * @returns {Function} Returns the new constant function.
+ * @example
+ *
+ * var objects = _.times(2, _.constant({ 'a': 1 }));
+ *
+ * console.log(objects);
+ * // => [{ 'a': 1 }, { 'a': 1 }]
+ *
+ * console.log(objects[0] === objects[1]);
+ * // => true
+ */
+function constant(value) {
+ return function() {
+ return value;
+ };
+}
+
+/**
+ * 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;
+}
+
+/**
+ * This method returns `false`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.13.0
+ * @category Util
+ * @returns {boolean} Returns `false`.
+ * @example
+ *
+ * _.times(2, _.stubFalse);
+ * // => [false, false]
+ */
+function stubFalse() {
+ return false;
+}
+
+module.exports = merge;
projects / dotfiles / .git / blobdiff