title: Adding or appending object with object javascript
body: <p>i am having 2 objects and the code is</p>
  
  <p>Object 1</p>
  
  <pre><code>var existingValue=self.get('objHubDto').ftd.gridDataDTO.gridDTOMap[name].gridDataMap;
  </code></pre>
  
  <p>Object 2</p>
  
  <pre><code>var newValue =  self.get('childDataList')
  </code></pre>
  
  <p>I need to merge/add/append this two in newvalue value eventhough it having duplicate key values</p>