ambari-web/app/utils/ember_reopen.js

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

/**
 Merge the contents of two objects together into the first object.

 ```javascript
 Ember.merge({first: 'Tom'}, {last: 'Dale'}); // {first: 'Tom', last: 'Dale'}
 var a = {first: 'Yehuda'}, b = {last: 'Katz'};
 Ember.merge(a, b); // a == {first: 'Yehuda', last: 'Katz'}, b == {last: 'Katz'}
 ```

 @method merge
 @for Ember
 @param {Object} original The object to merge into
 @param {Object} updates The object to copy properties from
 @return {Object}
 */
Ember.merge = function(original, updates) {
  for (var prop in updates) {
    if (!updates.hasOwnProperty(prop)) { continue; }
    original[prop] = updates[prop];
  }
  return original;
};

/**
 Returns true if the passed value is null or undefined. This avoids errors
 from JSLint complaining about use of ==, which can be technically
 confusing.

 ```javascript
 Ember.isNone();              // true
 Ember.isNone(null);          // true
 Ember.isNone(undefined);     // true
 Ember.isNone('');            // false
 Ember.isNone([]);            // false
 Ember.isNone(function() {});  // false
 ```

 @method isNone
 @for Ember
 @param {Object} obj Value to test
 @return {Boolean}
 */
Ember.isNone = function(obj) {
  return obj === null || obj === undefined;
};

/**
 Verifies that a value is `null` or an empty string, empty array,
 or empty function.

 Constrains the rules on `Ember.isNone` by returning false for empty
 string and empty arrays.

 ```javascript
 Ember.isEmpty();                // true
 Ember.isEmpty(null);            // true
 Ember.isEmpty(undefined);       // true
 Ember.isEmpty('');              // true
 Ember.isEmpty([]);              // true
 Ember.isEmpty('Adam Hawkins');  // false
 Ember.isEmpty([0,1,2]);         // false
 ```

 @method isEmpty
 @for Ember
 @param {Object} obj Value to test
 @return {Boolean}
 */
Ember.isEmpty = function(obj) {
  return Ember.isNone(obj) || (obj.length === 0 && typeof obj !== 'function') || (typeof obj === 'object' && Ember.get(obj, 'length') === 0);
};

/**
 A value is blank if it is empty or a whitespace string.

 ```javascript
 Ember.isBlank();                // true
 Ember.isBlank(null);            // true
 Ember.isBlank(undefined);       // true
 Ember.isBlank('');              // true
 Ember.isBlank([]);              // true
 Ember.isBlank('\n\t');          // true
 Ember.isBlank('  ');            // true
 Ember.isBlank({});              // false
 Ember.isBlank('\n\t Hello');    // false
 Ember.isBlank('Hello world');   // false
 Ember.isBlank([1,2,3]);         // false
 ```

 @method isBlank
 @for Ember
 @param {Object} obj Value to test
 @return {Boolean}
 */
Ember.isBlank = function(obj) {
  return Ember.isEmpty(obj) || (typeof obj === 'string' && obj.match(/\S/) === null);
};

Em.View.reopen({
  /**
   * overwritten set method of Ember.View to avoid uncaught errors
   * when trying to set property of destroyed view
   */
  set: function(attr, value){
    if(!this.get('isDestroyed') && !this.get('isDestroying')){
      this._super(attr, value);
    } else {
      console.debug('Calling set on destroyed view');
    }
  }
});