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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:Apple订购半小时剧集《狄金森》(Dickinson，暂译)，该剧由海莉·斯坦菲尔德主演，她将在剧中扮演二十世纪现代主义诗歌先驱之一艾米莉·狄金森。阿莲娜·史密斯(《婚外情事》)编剧，大卫·戈登·格林执导。剧集将设定在艾米莉·狄金森生活的时代，故事围绕狄金森家庭，她自我创造诗歌的历程等展开。剧集也将见证狄金森个人的成长过程。电视连续剧《春露》讲述的是在中国新民主主义革命时期和新中国成立后的岁月中，我党杰出领导人王稼祥的坎坷经历。15位同学在剧中饰演的是满腔热血、具有强烈爱国主义精神的大学生，在中国新民主主义革命时期，他们追求真理，不畏艰险。他们心中充满了希望与渴望……杨长帆急中生智，从囊中掏出了沈悯芮的那一幅刺绣。我心里想，若是能跟他们家结一门亲，那就更好了。昏暗的灯光下，一个身材娇小的黑衣人看着尹旭，愕然道：尹旭？是你？女人？听到女人说话时，尹将军不一怔，旋即又觉得这声音好生熟悉。