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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:Charm 2:51-300不料，一个简直是为杜拉拉量身定做的敌人凯西横空出世，空降公司和拉拉竞争人事总监。凯西二十妙龄，三十岁的拉拉惨被划归老女人阵营。工作上狭路相逢勇者胜，杜拉拉决定赌上三十岁女人的尊严和凯西拼了！但让杜拉拉万万没想到的是，凯西的猛烈旋风竟还席卷向她的家庭生活。好容易站稳了，忙匆匆吃了点东西，就骑马去见林聪。About plant dyeing materials and hue, I would also like to share them here.爱夫妇二人在遭遇孩子危机之后，决定领养。14恶魔游戏软件Ryo Takayama Tamori