JS模式之简单的订阅者和发布者模式完整实例

本文实例讲述了JS模式之简单的订阅者和发布者模式。分享给大家供大家参考。具体如下：
<！DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>parten</title></head><body><script>var singletonTest = SingletonTest.getInstance（{pointX : 5}）;console.log（singletonTest.pointX）;//easy_Observer_model;function ObserverList（）{this.observerList = [];};ObserverList.prototype.Add = function（obj）{return this.observerList.push（obj）;};ObserverList.prototype.Empty = function（）{this.observerList = [];};ObserverList.prototype.Count = function（）{return this.observerList.length;};ObserverList.prototype.Get = function（index）{if（index>-1 && index<this.observerList.length）return this.observerList[index];};ObserverList.prototype.Insert = function（obj,index）{var pointer = -1;if（index == 0）{this.observerList.unshift（obj）;pointer = index;}else if（index == this.observerList.length）{this.observerList.push（obj）;pointer = index;};return pointer;};ObserverList.prototype.IndexOf = function（obj,startIndex）{var i = startIndex, pointer = -1;while（i < this.observerList.length）{if（this.observerList[i] === obj）{pointer = i;};i++};return pointer;};ObserverList.prototype.RemoveIndexAt = function（index）{if（index === 0）{this.observerList.shift（）;}else if（index === this.observerList.length-1）{this.observerList.pop（）;};return index;};function extend（obj,extension）{for（var key in obj）{extension[key] = obj[key];}};//function Subject（）{this.observers = new ObserverList（）;};Subject.prototype.AddObserver = function（obj）{this.observers.add（obj）};Subject.prototype.RemoveObserver = function（observer）{this.observers.removeIndexAt（ this.observers.IndexOf（observer,0） ）;};Subject.prototype.Notify = function（context）{var observerCount = this.observers.count（）;for（var i=0; i<observerCount; i++）{this.observers.Get（i）.update（context）;};}//Pubsub//subscribevar Pubsub = {};（function（q）{var topics = [],subUid = -1;q.publish = function（topic,args）{if（！topics[topic]）{return false;};var subscribers = topics[topic],len = subscribers ? subscribers.length : 0;while（len--）{subscribers[len].func（topic,args）;}return this;};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; i<topics[m].length; i++）{if（topics[m][i].token === token）{topics[m].splice（i,1）;return token;}}};};return this;}}）（pubsub）;</script></body></html>
希望本文所述对大家的javascript程序设计有所帮助。