Improve this AngularJS factory to use with socket.io

Question

I want to use socket.io in AngularJS. I found the following factory:

app.factory(\'socket\', function ($rootScope) {
    var socket = io.connect();
    retur         


        

Answer 1

I am doing this to avoid duplicated listeners and works pretty well.

 on: function (eventName, callback) {
  //avoid duplicated listeners
  if (listeners[eventName] != undefined) return;

  socket.on(eventName, function () {
     var args = arguments;
     $rootScope.$apply(function () {
        callback.apply(socket, args);
     });
     listeners[eventName] = true;
  });
},