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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:THE K2描绘的是的热烈的爱着国家与同僚却被他们抛弃的警卫员，与连爱情都能作为复仇工具使用的有力大选候选人隐藏着的女儿之间的故事。这里还勾画了准第一夫人隐藏的欲望的故事。超强押运人弗兰克·马丁（杰森·斯坦森 Jason Statham 饰）近期的工作是接送缉毒官员比林斯先生的小儿子杰克，弗兰克与杰克母子相处和谐，但一伙歹徒的突然出现打破了平静，弗拉克与他们在医院首次交手顺利脱险，可为了杰克的安全着想，弗兰克不得不把孩子送到对方手中，并因此被警方确认为绑架嫌犯。弗兰克发觉这次绑架另有深意，策划此次事件的幕后贩毒集团意在通过小杰克将致命病毒传染给参加国际会议的各国缉毒组织高官，以便为自己的犯罪行为扫清障碍。弗兰克承担着杰克母亲奥黛丽的信任，在警方与贩毒集团的追夹中，逐渐逼近幕后策划者詹尼（Alessandro Gassman 饰），并与同样身手不凡的詹尼展开天上水下的连场搏杀。In more than a month after the "rebirth", Ellie began to exercise and to find a new job.赵文华的表情可谓是喜忧参半。