PubSub based on jQuery.Callback

gistfile1.js

define(['jquery'], function ($) {
	var topics = {},
		topic = function (id) {
			var fn = this.toString(),
				args = [].slice.call(arguments, 1);
			(topics[id] = topics[id] || $.Callbacks())[fn].apply(null, args);
		};

	return {
		pub: function () { topic.apply('fire', arguments); },
		sub: function () { topic.apply('add', arguments); },
		unsub: function () { topic.apply('remove', arguments); }
	};
});