title: Retrieving all socket objects in io.socket
body: <p>I'm looking to get all individuals socket objects out of <code>io.sockets</code> and iterate over each of them.</p>
  
  <p>Something like:</p>
  
  <pre><code>for (socket in io.sockets.something()) {
     // do something with each socket
  }
  </code></pre>
  
  <p>Either I'm doing this wrong or I must be missing something. Thoughts?</p>