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　　为了还自己清白，齐淼努力查找真相，一个惊天秘密浮出水面....这么一比，两人倒比板栗小葱更像双胞胎。　 大正25年，帝都东京。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:From the above command class code, we can see that any operation has an execute method to perform the operation. The above code uses traditional object-oriented programming to implement the command mode. The procedural request call of the command mode is encapsulated in the execute method of the command object. Have we found the above writing code a little cumbersome? We can do this using the callback functions in javascript, In object-oriented, The receiver of the command mode is saved as an attribute of the command object, and the command execution operation is agreed to call the command.execute method. However, if we use the callback function, then the receiver is closed in the environment where the callback function is generated, and the execution operation will be simpler. Only the callback function can be executed. Let's look at the following code:Test environment: armor belt 20% toxic damage, helmet shoes 20% flame damage, weapon only one Atlantis dagger has an element damage entry 30% element damage. Krypton Gold Dagger with Secondary Weapon Belt (Guaranteed No Elemental Damage), Bow with Vine Bow (Guaranteed No Elemental Damage), Poison Fire Specialization Level 3 (40% Damage Bonus)集美貌、文才、歌艺于一身的杜家二小姐月红姑娘梦想嫁给一个状元郎，为此她不惜到醉香坊抛头露面，用她的美貌与才艺震动四方，为的就是有朝一日钓得一个状元之才的夫君，一时间，天下风流才子无不趋之若鹜，争相拜倒在月红之石榴裙下，怎奈月红非状元之才不嫁，眼界之高，令天下男人肝肠寸断。