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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:众人都笑，正闹着，冬子跑进来对板栗道：大少爷，泥鳅少爷来了。2. Avoid the infinite expansion of the Context, the logic of state switching is distributed in the state class, and the original excessive conditional branches in the Context are also removed.故事主要从武则天在家乡的成长讲述到她14岁入宫闱后的权力斗争的故事。该剧将刻画出一个全新的武则天，一个除掉各种妖魔化的脸谱、还原一个最为真实的武则天。它较以往那些关于武则天的作品有着一个全新而又独特的视角。故事主要从武则天在家乡的成长讲述到她14岁入宫闱后的权力斗争的故事。该剧讲述了父亲老曾在昏迷醒来后，面对曾经幸福现在暗流汹涌的家庭，他用自己独特的方式介入到四个子女的生活，在不停的碰撞中改变了子女，也改变了他自己的故事。经理重新回归到焦头烂额的办公室生活。小乔回台湾探亲尚未回，和经理联系也不多。经理接到小乔的电话要其结婚，便兴奋赶往台湾成亲，在与槟榔西施、台湾黑帮各色人等打过交道后，经理终于来到小乔家见父母，究竟经理与小乔能否顺利结婚……前几天，吕馨从陈启口中知道了燕南天此行会死了一半。