title: Update Only changed Objects inside Array inside ngFor?
body: <p>I have a JSON(Array of Objects) coming from server for each second.I would like to update UI only for the objects whose data changes and unchanged object remain as same before.I am supposing data arrived 2 times from server.</p>
  
  <pre><code>1st time:
  
  [
    {} //Object1
    {} //Object2
    {} //Object3
  ]
  
  2nd time:
  
   [
    {} //Object1.Changed
    {} //Object2.Unchanged
    {} //Object3.changed
   ]
  </code></pre>
  
  <p>I want to display all 3 objects in UI but I want changes to be reflected to only Object1 and Object3 and I do not want to <strong>TOUCH</strong> Object2 as it is not changed.</p>
  
  <p>Is it Possible ?</p>