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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:Fabric Technology: Climacool描述国共内战时期，大少爷徐福贵嗜赌成性，妻子家珍屡劝无效，带着女儿凤霞回娘家。当夜福贵输光全部家产，父亲给他气死。一年后，家珍带着女儿及手抱的男婴有庆回家，福贵痛改前非，走埠演皮影戏维生。适逢国共内战，福贵先被国民党拉俘当兵，后被俘掳。好不容易获释回乡，庆幸一家团圆，却发现凤霞生病成了哑巴……本片根据余华同名原著小说改编，获法国第47届戛纳电影节评审奖，最佳男主角奖。本片以贴近生活的小人物通俗剧风格反映数十年来中国老百姓“好死不如赖活着”的生活观。Direct attack纽约地铁上，几个小混混无端挑衅一个衣着褴褛的流浪汉，却不想被他狠狠收拾了一顿，众人全部被带回警局。警官卡特（塔拉吉·P·汉森 Taraji P. Henson 饰）对这个神秘的流浪汉充满兴趣，正当调查处一丝线索，不想流浪汉竟然被人保释。原来流浪汉是一个曾经接受过中央情报局特殊训练的特工里瑟（詹姆斯·卡维泽 James Caviezel 饰），而保释他的则是拥有无限的财富的富翁芬奇（迈克尔·爱默生 Michael Emerson 饰）。芬奇曾为政府研发了一种可识别罪犯犯罪意识的程序，却被政府认为大材小用而关闭了一部分程序。而现在芬奇希望借助里瑟的能力和这一套程序进行“法外执法”，维持正义、制止犯罪....元气少女许伊人与霸道总裁方知有初遇就被当众戳破男友谎言导致分手，本以为不会再有交集的两个人却在面试会上再次相遇。“表现不好”许伊人正为辞职又遇“冤家”郁郁寡欢时意外得知被方知有录取，自此化身为“无法说谎”总裁的“谎言”小助理，从互看不顺眼到相互扶持、逐渐产生情愫，许伊人用善意谎言搭建爱情桥梁，发生一系列令人意想不到的逗趣爱情故事。