title: Caret in objective C
body: <p>What does the caret in objective C mean?</p>
  
  <p>ie.</p>
  
  <p><code>void (^handler)(NSInteger);</code></p>
  
  <p>from <a href="http://developer.apple.com/mac/library/documentation/DeveloperTools/Conceptual/IB_UserGuide/QuickStart/QuickStart.html#//apple_ref/doc/uid/TP40005344-CH22-SW5" rel="noreferrer">Mac Dev Center</a></p>