title: How can I append objects to an NSMutableArray?
body: <p>I have two arrays and I would like to append one to the end of the other. How can I go about doing this?</p>
  
  <pre><code>self.itemsCopy = [self.items mutableCopy];
  </code></pre>
  
  <p>Will copy the array, but I would like to append self.items.</p>