Add .once

[rauchg]

No description provided.

[3rd-Eden]

I can understand the need of a .once event listener but there's a really big downside of this method. Once you attach a .once listener there is no way of removing it. Because the supplied function is wrapped in a closure and added to the .events queue. If you want to remove the event you would need to have the exact function to match it.

That's the reason why I removed .once from my reconnect example, because there is no clear way to remove them. Node.js suffers from the same limitation.

[3rd-Eden]

I can probably create a small walk around for this by adding a reference to the original code to the function. Than it would allow users to also remove the .once event using removeEvent..

For example:
Socket.prototype.once = function(name, fn){
var self = this
, once = function(){
self.removeEvent(name, once);
fn.apply(self, arguments);
};
once.reference = fn;
self.on(name, once);
return this;
};

Socket.prototype.removeEvent = function(name, fn){
  if (name in this.events){
    for (var a = 0, l = this.events[name].length; a < l; a++)
      if (this.events[name][a] == fn || this.events[name][a].reference && this.events[name][a].reference == fn) this.events[name].splice(a, 1);    
  }
  return this;
};

[rauchg]

Fixed

[JuanAntelo]

Does this send a message once then close the socket or open only one socket?