"use strict";function PubSub(){this._subscribers=[]}PubSub.prototype={subscribe:function(fn,ctx){var self=this;function callback(){return fn.apply(ctx||self,arguments)}callback.fn=fn;callback.ctx=ctx;this._subscribers.push(callback)},unsubscribe:function(fn,ctx){for(var i=0;i<this._subscribers.length;i++){if(this._subscribers[i].fn!==fn||this._subscribers[i].ctx!==ctx)continue;this._subscribers.splice(i,1);return true}return false},publish:function(){var args=Array.prototype.slice.call(arguments,0);for(var i=0;i<this._subscribers.length;i++){this._subscribers[i].apply(this,args)}}};module.exports=function(){return new PubSub};module.exports.PubSub=PubSub;