Simple Pub/Sub Implementation for jQuery

jquery.pubsub.js

/*    
jQuery pub/sub plugin by Peter Higgins ([email protected])

Loosely based on Dojo publish/subscribe API, limited in scope. Rewritten blindly.

Original is (c) Dojo Foundation 2004-2010. Released under either AFL or new BSD, see:
http://dojofoundation.org/license for more information.
*/
(function($) {
    var topics = {};

    $.publish = function (topic, args) {
        if (topics[topic]) {
            var current = topics[topic]
                ,i = 0
                ,l = current.length;

            for (; i < l; i++) {
                current[i].call($, args);
            }
        }
    };

    $.subscribe = function (topic, callback) {
        (topics[topic] = topics[topic] || [])
            .push(callback);

        return {
            "topic": topic
            ,"callback": callback
        };
    };

    $.unsubscribe = function (handle) {
        var current
            ,i = 0
            ,len
            ,topic = handle.topic;

        if (topics[topic]) {
            current = topics[topic];

            for (len = current.length; i < len; i++) {
                if (current[i] === handle.callback) {
                    current.splice(i, 1);
                }
            }
        }
    };
})(jQuery);

jquery.pubsub.min.js

/*    
jQuery pub/sub plugin by Peter Higgins ([email protected])

Loosely based on Dojo publish/subscribe API, limited in scope. Rewritten blindly.

Original is (c) Dojo Foundation 2004-2010. Released under either AFL or new BSD, see:
http://dojofoundation.org/license for more information.
*/
(function(a){var b={};a.publish=function(c,d){if(b[c]){var e=b[c],f=0,g=e.length;for(;f<g;f++){e[f].call(a,d)}}};a.subscribe=function(a,c){(b[a]=b[a]||[]).push(c);return{topic:a,callback:c}};a.unsubscribe=function(a){var c,d=0,e,f=a.topic;if(b[f]){c=b[f];for(e=c.length;d<e;d++){if(c[d]===a.callback){c.splice(d,1)}}}}})(jQuery);