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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:哇塞。ColorBurn　　“《Claws》既疯狂又搞笑，我们已经等不及看到观众们完全沉浸在那个世界当中了。”TNT原创项目部的执行副总裁Sarah Aubrey说，“这是一部讲述女性角色的非常棒的剧集，不论是在台前还是幕后，演员和角色都是难以置信，他们把这部剧出演得极其生动。”重修三次大学，玩了三年，公务员考试准备了三年的河阴奉式家族三代独子奉必（金在中 饰）是小区出名的神级无业游民。在听闻自己单恋了28年的女性朋友姜秀珍（金宥真 饰）就要结婚的晴天霹雳后，沮丧的他坠入奇怪的检查井开始了一场荒唐的时间之旅。如果无法阻止一周以后心爱的她的婚礼，那么他将以宾客而非新郎的身份出席这场婚礼。面对这样的境况，他可以成功的阻止这场婚礼，得到她的心吗？那后面可还有千里挑一的呢，我们下面的臣子，不刚好沾光？届时招亲会就是个媒人场。