title: Push object onto end of array using new literal syntax
body: <p>PHP has:</p>
  
  <pre><code>arr[] = 'Push this onto my array';
  </code></pre>
  
  <p>Where the string will be added to the end of the array.</p>
  
  <p>Is there any equivalent of this in the new Objective-C literal syntax? The most succinct way I can think of doing it is:</p>
  
  <pre><code>arr[arr.count] = @"Add me";
  </code></pre>
  
  <p>but maybe there's something better out there?</p>