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+/**
+ * lodash 3.1.2 (Custom Build) <https://lodash.com/>
+ * Build: `lodash modern modularize exports="npm" -o ./`
+ * Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
+ * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
+ * Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
+ * Available under MIT license <https://lodash.com/license>
+ */
+var getNative = require('lodash._getnative');
+
+/** Native method references. */
+var Set = getNative(global, 'Set');
+
+/* Native method references for those with the same name as other `lodash` methods. */
+var nativeCreate = getNative(Object, 'create');
+
+/**
+ *
+ * Creates a cache object to store unique values.
+ *
+ * @private
+ * @param {Array} [values] The values to cache.
+ */
+function SetCache(values) {
+ var length = values ? values.length : 0;
+
+ this.data = { 'hash': nativeCreate(null), 'set': new Set };
+ while (length--) {
+ this.push(values[length]);
+ }
+}
+
+/**
+ * Adds `value` to the cache.
+ *
+ * @private
+ * @name push
+ * @memberOf SetCache
+ * @param {*} value The value to cache.
+ */
+function cachePush(value) {
+ var data = this.data;
+ if (typeof value == 'string' || isObject(value)) {
+ data.set.add(value);
+ } else {
+ data.hash[value] = true;
+ }
+}
+
+/**
+ * Creates a `Set` cache object to optimize linear searches of large arrays.
+ *
+ * @private
+ * @param {Array} [values] The values to cache.
+ * @returns {null|Object} Returns the new cache object if `Set` is supported, else `null`.
+ */
+function createCache(values) {
+ return (nativeCreate && Set) ? new SetCache(values) : null;
+}
+
+/**
+ * Checks if `value` is the [language type](https://es5.github.io/#x8) of `Object`.
+ * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(1);
+ * // => false
+ */
+function isObject(value) {
+ // Avoid a V8 JIT bug in Chrome 19-20.
+ // See https://code.google.com/p/v8/issues/detail?id=2291 for more details.
+ var type = typeof value;
+ return !!value && (type == 'object' || type == 'function');
+}
+
+// Add functions to the `Set` cache.
+SetCache.prototype.push = cachePush;
+
+module.exports = createCache;