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+var baseClone = require('../internal/baseClone'),
+ bindCallback = require('../internal/bindCallback'),
+ isIterateeCall = require('../internal/isIterateeCall');
+
+/**
+ * Creates a clone of `value`. If `isDeep` is `true` nested objects are cloned,
+ * otherwise they are assigned by reference. If `customizer` is provided it's
+ * invoked to produce the cloned values. If `customizer` returns `undefined`
+ * cloning is handled by the method instead. The `customizer` is bound to
+ * `thisArg` and invoked with up to three argument; (value [, index|key, object]).
+ *
+ * **Note:** This method is loosely based on the
+ * [structured clone algorithm](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm).
+ * The enumerable properties of `arguments` objects and objects created by
+ * constructors other than `Object` are cloned to plain `Object` objects. An
+ * empty object is returned for uncloneable values such as functions, DOM nodes,
+ * Maps, Sets, and WeakMaps.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @param {Function} [customizer] The function to customize cloning values.
+ * @param {*} [thisArg] The `this` binding of `customizer`.
+ * @returns {*} Returns the cloned value.
+ * @example
+ *
+ * var users = [
+ * { 'user': 'barney' },
+ * { 'user': 'fred' }
+ * ];
+ *
+ * var shallow = _.clone(users);
+ * shallow[0] === users[0];
+ * // => true
+ *
+ * var deep = _.clone(users, true);
+ * deep[0] === users[0];
+ * // => false
+ *
+ * // using a customizer callback
+ * var el = _.clone(document.body, function(value) {
+ * if (_.isElement(value)) {
+ * return value.cloneNode(false);
+ * }
+ * });
+ *
+ * el === document.body
+ * // => false
+ * el.nodeName
+ * // => BODY
+ * el.childNodes.length;
+ * // => 0
+ */
+function clone(value, isDeep, customizer, thisArg) {
+ if (isDeep && typeof isDeep != 'boolean' && isIterateeCall(value, isDeep, customizer)) {
+ isDeep = false;
+ }
+ else if (typeof isDeep == 'function') {
+ thisArg = customizer;
+ customizer = isDeep;
+ isDeep = false;
+ }
+ return typeof customizer == 'function'
+ ? baseClone(value, isDeep, bindCallback(customizer, thisArg, 3))
+ : baseClone(value, isDeep);
+}
+
+module.exports = clone;