title: Comparing two NSDictionaries and Find Difference
body: <p>I am working on an iOS app, where I will be getting a JSON Object from server, which will be populated on a UITableView.</p>
  
  <p>User can change values on tableview, Hence resulting in a new JSON.
  Now I want to send only delta (Difference of Two JSON Objects) back to server.
  I know I can traverse both Objects for finding delta. But just wish to know is there any easy solution for this problem.</p>
  
  <p>Ex:</p>
  
  <pre><code>NSDictionary *dict1 = {@"Name" : "John", @"Deptt" : @"IT"};
  NSDictionary *dict2 = {@"Name" : "Mary", @"Deptt" : @"IT"};
  
  Delta = {@"Name" : "Mary"}
  </code></pre>
  
  <p>Considering new value is Mary for key name;</p>
  
  <p>Thanks In Advance</p>