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Editor's Note: This article is transferred from WeChat's public number "KMCenter for Knowledge Management" (KMCenter). The author is Tian Zhigang, a well-known knowledge management expert, who is the author of "Your Knowledge Needs Management". The content of this article is the material of "How to Become an Expert". 36 Krypton is authorize to forward.Command mode belongs to the behavior mode of an object. Command mode encapsulates a request or operation into an object, and separates the responsibility of issuing the command from the responsibility of executing the command through abstraction of the command. The implementation of command mode can provide the functions of revocation and recovery of commands. The specific structure diagram is shown below.由Gil Grissom领导的拉斯维加斯警局犯罪鉴证科夜班组的任务是深入案发现场寻找种种蛛丝马迹，并利用最先进的科技手段，把表面上没有任何联系、没有意义的线索拼凑成不可辩驳的证据，抽丝剥茧重组案情，让犯罪分子无处可逃……传说中国设有一高度机密之保镖训练学校，所有成员都练得一身好工夫，专门授命中国政府解决国际问题。其中一组由六男一女，组号名为“七金刚” 　　Iterator mode: Pay attention to encapsulating changes in specific fields, support changes in collections, shield complex internal structures of collections objects, and provide transparent traversal of collections by client programs.MotionEvent is always received first by Activity一代武术名家的传奇，全新上演……