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User class unified interface, User1 and User2 are different objects respectively, and they are related. If the mediator mode is not adopted, the two need to hold references to each other, so the coupling degree between the two is very high. In order to decouple, the Mediator class is introduced to provide unified interface, and MyMediator is its implementation class, which holds instances of User1 and User2 to control User1 and User2. In this way, User1 and User2 objects are independent of each other. They only need to maintain a good relationship with the Mediator, and the rest is maintained by the MyMediator class! Basic implementation:The above is just a synchronous chain of responsibilities, We let each node function return a specific value "nextSuccessor" synchronously, To indicate whether to pass the request to the next node, we will often encounter AJAX asynchronous requests in our development. After the request is successful, we need to do something so-and-so. At this time, if we apply the above synchronous request again, it will not take effect. Let's understand and use asynchronous responsibility chain to solve this problem. We add another prototype method Chain.prototype.next to the Chain class to manually pass the request to the next node in the responsibility chain.与玉娘出事的时间一致，香溪河下游正是彭蠡泽，前后印证，也就是说玉娘未死。　　一个偶然的机会，布罗根找到了杰西并在杰西居住的小岛上和杰西相爱了。就在两个人过着世外桃源般的幸福爱情生活时，球队原主教练萨利找到了他们。身为朋友但不明真相的萨利本想好好教训一番布罗根并劝他返回球队参加比赛，谁知杰西却失手开枪将萨利打死。萨利死后，杰西当时就跑了，等布罗根处理完萨利的尸体回到城里找到杰克时，让布罗根意想不到的是，杰西居然出现在杰克的身边，而且杰克已经知道发生在丛林小岛上的一切事情……Creative patterns are patterns used to create objects, abstracting the instantiation process. All creative patterns have two things in common. First, they all encapsulate the specific types of information used by the system. Second, they hide how instances of these classes are created and organized. Creative patterns include singleton patterns, factory method patterns, abstract factory patterns, builder patterns and prototype patterns.咦，那小贼为何没被吓傻？这根本不可能。