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四人喝茶说笑，白果道：少爷，等重阳节的时候，咱们回了老……太太，去松山玩。Output:(3) BattlefieldSix fairiesFrom 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:萧文、张平、常闯分到刑警队，队长潘荣亲自当他们的师傅。潘荣带他们处理的第一案子是绑架案，被绑架的是江洲宾馆公关部的女经理梅莉。萧文一枪解决绑架者。潘荣对萧文擅自开枪不满意，可圆满的结果还是令他对徒弟们刮目相看。萧文该提升队长了，可主管的潘荣不同意，萧文去了行政科。行政工作萧文干得不错，可他总觉得不如刑警来劲，一气之下请求辞职。在冯局长和张平的支持下，萧文总算重回刑警队伍，可他已无任何官职，而且是去北海从事外围侦察工作，工作上心气不顺，弄得萧文和梅莉之间也出现了矛盾。