Bump to v3.8.0.

lodash.mapkeys/index.js

@@ -0,0 +1,70 @@
+/**
+ * lodash 3.8.0 (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 baseCallback = require('lodash._basecallback'),
+    baseFor = require('lodash._basefor'),
+    keys = require('lodash.keys');
+
+/**
+ * The base implementation of `_.forOwn` without support for callback
+ * shorthands and `this` binding.
+ *
+ * @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 baseFor(object, iteratee, keys);
+}
+
+/**
+ * Creates a function for `_.mapKeys` or `_.mapValues`.
+ *
+ * @private
+ * @param {boolean} [isMapKeys] Specify mapping keys instead of values.
+ * @returns {Function} Returns the new map function.
+ */
+function createObjectMapper(isMapKeys) {
+  return function(object, iteratee, thisArg) {
+    var result = {};
+    iteratee = baseCallback(iteratee, thisArg, 3);
+
+    baseForOwn(object, function(value, key, object) {
+      var mapped = iteratee(value, key, object);
+      key = isMapKeys ? mapped : key;
+      value = isMapKeys ? value : mapped;
+      result[key] = value;
+    });
+    return result;
+  };
+}
+
+/**
+ * The opposite of `_.mapValues`; this method creates an object with the
+ * same values as `object` and keys generated by running each own enumerable
+ * property of `object` through `iteratee`.
+ *
+ * @static
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to iterate over.
+ * @param {Function|Object|string} [iteratee=_.identity] The function invoked
+ *  per iteration.
+ * @param {*} [thisArg] The `this` binding of `iteratee`.
+ * @returns {Object} Returns the new mapped object.
+ * @example
+ *
+ * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
+ *   return key + value;
+ * });
+ * // => { 'a1': 1, 'b2': 2 }
+ */
+var mapKeys = createObjectMapper(true);
+
+module.exports = mapKeys;