title: Remove objects on disconnect socket.io
body: <p>I'm using Nodejs and Socket.io.  When the client connects, new JavaScript objects are created.</p>
  
  <p>Do these objects just linger forever? Should they be deleted or removed when the client disconnects? Is it even possible to remove an object? I  know delete won't work...</p>
  
  <p>Thanks - I guess this is more of a general question and any suggestions would be really helpful.</p>
  
  <p>Thanks!</p>