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免礼免礼。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:16.5 The treatment of airsickness is ineffective and unqualified.The princess of Shu put down her veil and said coldly, "Do you see clearly?"针对不断变化的忠诚，不安的联盟和敌对古代的背景下，共和国和分离主义之间的冲突斜升，从而为达斯西迪厄斯的最终背叛反对绝地行为。在这些不确定的时代，一些该部队的光明与黑暗两面的最深的奥秘被揭示为一个勇敢的克隆人士兵揭露了一个令人震惊的阴谋。天行者阿纳金的关系最密切的是测试它的极限，尤达大师，使这一发现可能会永远改变银河系的力量平衡那么这个跨时间旅行者本人还会不会存在呢？显然如果没有外祖母，就不会有跨时间旅行者的母亲，自然也就没有了这个跨时间旅行者。