title: Memory leaks in Xcode 4.2 and iOS 5
body: <p>I use xcode 4.2 and this use ARC (Automatic Reference Counting).</p>
  
  <hr>
  
  <p>This is not memory leak, because ARC send message of 'release':</p>
  
  <pre><code>NSNumber *xy = [[NSNumber alloc] init];
  </code></pre>
  
  <p>But it's possible to create memory leaks with this:</p>
  
  <pre><code>char *oldString = "Old String";
  char newStrig = strdup(oldString);
  </code></pre>
  
  <p>I wanted to know that other types of memory leaks can be made?
  (If is possible without using C or C++)</p>