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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:Num出身豪门，独子，父严母慈，生活幸福。后来父亲和居心叵测的女佣私通，赶走了Num母子，父亲发现女佣的私情，争执中被女佣的情人杀害。Num长大后，母亲也去世，有个外国警察叔叔一直帮他。总是趁机虐待她，Jui亲眼目睹Num的父亲被害的真相，无可奈何。Jui聪明、坚强、善良，女佣对她非打即骂，但她还是尽心服侍，毫无怨言。女佣继承了老公的产业，不过不擅经营，全靠Jui用心打理。 　　两个完全没有交集的人竟发生了一段曲折离奇的摩擦...　　退役特种兵“狼王”龙卫集结幸存战友为因遭暗算而遇难他乡的兄弟复仇并卷入一场国际犯罪案件的故事。五年前国际犯罪集团首领“黑狐”买通藤国情报官桑坤，给血狼特种兵部队设下陷阱，令十二名特战精英遇难他乡。血狼小队指挥官“狼王”龙卫蛰伏五年后重组血狼三人小队，远赴藤国为战友复仇。其间，龙卫、马跃和陆大山三兄弟联络到有着共同目标的新盟友——雅塔，并与之共同展开围剿桑坤的行动。与此同时，在藤国北部的海亚博士正在研制一种专门针对中国人的基因武器——黑色罂粟！龙卫等人层层闯关，攻入实验室，截住海亚博士和原液配方。这一仗本来大获全胜，没想到雅塔忽然调转枪口，指向龙卫，一场有预谋的作战计划悄然进行。正当血狼小组要突破最后关卡的时候，“猎狼”马跃的妻子被绑架，藤国也发生了呼吁前总统坤恩重新执政的示威游行，这背后隐藏着更加巨大的阴谋！龙卫三人再次联手雅塔，踏上了新的征程……First of all, this function is in "Other Power Settings", where we set how many minutes the computer will sleep or turn off the monitor option. There is a hidden menu of "Show Additional Plans" at the bottom of this interface. Expand it and you will find the "Excellent Performance" option.本剧第一季中结尾Karry回了美国，而在第二季中，自习室里又会发生怎样的事呢？Karry回到自习室了吗？敬请期待。