Pub / Sub

https://github.com/addyosmani/pubsubz/blob/master/pubsubz.js

by kuyabiye

JavaScript

/*!
* Pub/Sub implementation
* http://addyosmani.com/
* Licensed under the GPL
*/

var pubsubz = {};
(function (q) {

    var topics = {},
        subUid = -1;

    q.publish = function (topic, args) {

        if (!topics[topic]) {
            return false;
        }

        setTimeout(function () {
            var subscribers = topics[topic],
                len = subscribers ? subscribers.length : 0;

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

        return true;

    };

    q.subscribe = function (topic, func) {

        if (!topics[topic]) {
            topics[topic] = [];
        }

        var token = (++subUid).toString();
        topics[topic].push({
            token: token,
            func: func
        });
        return token;
    };

    q.unsubscribe = function (token) {
        for (var m in topics) {
            if (topics[m]) {
                for (var i = 0, j = topics[m].length; i < j; i++) {
                    if (topics[m][i].token === token) {
                        topics[m].splice(i, 1);
                        return token;
                    }
                }
            }
        }
        return false;
    };
}(pubsubz));



        var testSubscriber = function( topics , data ){
            console.log( topics + ": " + data );
        };

        var testSubscription = pubsubz.subscribe( 'example1', testSubscriber );

        pubsubz.publish( 'example1', 'hello world!' );
        pubsubz.publish( 'example1', ['test','a','b','c'] );
        pubsubz.publish( 'example1', [{'color':'blue'},{'text':'hello'}] );

        setTimeout(function(){
            pubsubz.unsubscribe( testSubscription );
        }, 0);
        
        pubsubz.publish( 'example1', 'hello again!' );