Simple Pub/Sub Implementation for jQuery

jquery-pubsub.js

/*
 * Simple Pub/Sub Implementation for jQuery
 *
 * Inspired by work from Peter Higgins (https://github.com/phiggins42/bloody-jquery-plugins/blob/master/pubsub.js)
 *
 * This is about the simplest way to write a pubsub JavaScript implementation for use with jQuery.
 */

(function( $ ) {
  // Cache of all topics
  var topics = {};

  // Iterates through all subscribers of a topic and invokes their callback,
  // passing optional arguments.
  $.publish = function( topic, args ) {
    if ( topics[ topic ] ) {
      var thisTopic = topics[ topic ],
        thisArgs = args || [];

      for ( var i = 0, j = thisTopic.length; i < j; i++ ) {
        thisTopic[i].apply( $, thisArgs );
      }
    }
  };

  // Returns a handle needed for unsubscribing
  $.subscribe = function( topic, callback ) {
    if ( !topics[ topic ] ) {
      topics[ topic ] = [];
    }

    topics[ topic ].push( callback );

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

  // Removes the subscriber from the particular topic its handle was assigned to
  $.unsubscribe = function( handle ) {
    var topic = handle.topic;

    if ( topics[ topic ] ) {
      var thisTopic = topics[ topic ];

      for ( var i = 0, j = thisTopic.length; i < j; i++ ) {
        if ( thisTopic[i] === handle.callback ) {
          thisTopic.splice( i, 1 );
          // break; here? duplicate handles are possible
        }
      }
    }
  };

})( jQuery );

/*
For example:

var handle = $.subscribe('notification', function (msg) {
  alert(msg);
});

$.publish('notification', ['Hello World']);

$.unsubscribe(handle);

*/

jquery-pubsub.min.js

/*
 * Simple Pub/Sub Implementation for jQuery
 *
 * Inspired by work from Peter Higgins (https://github.com/phiggins42/bloody-jquery-plugins/blob/master/pubsub.js)
 *
 * This is about the simplest way to write a pubsub JavaScript implementation for use with jQuery.
 */
(function(a){var b={};a.publish=function(c,d){if(b[c]){var e=b[c],f=d||[];for(var g=0,h=e.length;g<h;g++)e[g].apply(a,f)}},a.subscribe=function(a,c){b[a]||(b[a]=[]),b[a].push(c);return{topic:a,callback:c}},a.unsubscribe=function(a){var c=a.topic;if(b[c]){var d=b[c];for(var e=0,f=d.length;e<f;e++)d[e]===a.callback&&d.splice(e,1)}}})(jQuery);