Simple PubSub with Javascript

pubsub.js

/*

 ## Simple PubSub with Javascript

 ### Usage:

  var client = pubsub.subscribe('myChannel', function(data){
    console.log(data);
  });

  pubsub.publish( 'myChannel', 'Hello World!' );
  pubsub.publish( 'myChannel',  { event: '/comment/new', msg: 'my comment' } );

  pubsub.unsubscribe( client );

 */

var pubsub = {};
(function(p) {
  var channels = {}, subscriberCount = -1;
  p.subscribe = function(channel, func) {
    if (!channels[channel]) {
      channels[channel] = [];
    }
    var subscriberId = (++subscriberCount).toString();
    channels[channel].push({
      subscriberId: subscriberId,
      func: func
    });
    return subscriberId;
  };

  p.publish = function(channel, args) {
    if (!channels[channel]) {
      return false;
    }
    setTimeout(function() {
      var subscribers = channels[channel],
        len = subscribers ? subscribers.length : 0;

      while (len--) {
        subscribers[len].func(args);
      }
    }, 0);
    return true; 
  };

  p.unsubscribe = function(subscriberId) {
    for (var m in channels) {
      if (channels[m]) {
        for (var i = 0, j = channels[m].length; i < j; i++) {
          if (channels[m][i].subscriberId === subscriberId) {
            channels[m].splice(i, 1);
            return subscriberId;
          }
        }
      }
    }
    return false;
  };
}(pubsub));