/**
 * Copyright 2012 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

'use strict';

/**
 * Export extend
 * @type {Object}
 */
module.exports = {
  /**
   * Copy key/values to obj from all other objects passed in
   *
   * @param {object} a the destination object.
   * @return {object} the destination object.
   */
  extend: function(obj) {
    var source, prop;
    for (var i = 1, length = arguments.length; i < length; i++) {
      source = arguments[i];
      for (prop in source) {
        if (source.hasOwnProperty(prop)) {
          obj[prop] = source[prop];
        }
      }
    }
    return obj;
  }
};