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For example, if we want to implement a JS function, Such as form validation, Then if we don't use the policy pattern in javascript described in the previous chapter to solve the form validation encapsulation code, It is a temporary form validation function written by itself. Certainly without any encapsulation, Then at this time, we will pop up a prompt to the user for whether the two values are equal. If there is a form verification on another page, their judgment method and business logic are basically the same, but the comparison parameters are different. Should we consider writing a form verification code again? So now we can consider using the template method pattern to solve this problem. Common methods are extracted, and different methods are implemented by specific subclasses. This design code also has the advantages of stronger scalability and better code ~未来世界，随着科技的超速发展，大量高科技的机器人投入使用，为人类提供便利的同时也取代了大批劳动力。很快机器人的数量就已与人类不相上下，世界变成了机器与人类共生的一个团体。洛普（范·迪塞尔饰）是一名退役的老兵，空有一身的武艺却终日无所事事，转业当上了拿钱办事的雇佣兵，专门接受各种护送任务。一日，他接受了一项新任务：在丽贝卡修女（杨紫琼饰）的陪同下，押解一个神秘女人横跨欧亚大陆。然而他并不知道对方身上原来有着某种可怕的病毒，这种病毒的力量足以毁灭全世界。与此同时，一个邪教组织也正在对她虎视眈眈，企图利用这名女性产下一个基因改良的人种……在现有的工具工艺条件下，如何搞好一个火器作坊，虽然是本专业的，但具体知识都是建立在现代工业基础上而言的，书本上更不可能教你如何自制土枪土炮。When I first encountered this kind of "dog", The company commander glanced at it and said nothing, Immediately ordered us to fire, Shooting from high terrain has its advantages, We shot exactly from almost 100 meters away, After aiming at it, Hit to a distance of 30 meters but did not kill a few such 'dogs', At last I saw that these things were about to rush up, There was a sudden explosion in front of the position, The explosion was a temporary obstruction to them, We didn't remember until the bombing was over. Fortunately, some Type 66 directional anti-infantry mines were deployed 30 meters in front of the positions before. As well as some Type 72 anti-infantry mines, Although those "dogs" run fast, But because of his short body, So they are all 'sticking to the land', Triggered the guide line of the mine, Then it led to an explosion. Anti-infantry mines have almost no dead corners within the effective attack range, especially the "round head" type (72-type anti-infantry mines, which contain 650 anti-personnel steel balls and have no dead corners covered 360 degrees after the explosion). Many close 'dogs' were directly blown to pieces, while those far away were also beaten into 'pockmarks' by steel balls and died lying there.State mode and policy mode are like twins. They both encapsulate a series of algorithms or behaviors. Their class diagrams look almost identical, but their intentions are very different, so they are two very different modes. The policy pattern and the state pattern have in common that they both have a context, policies or state classes to which the context delegates the request to execute刘邦的斗志被逐渐消磨。　　《天空市凶案》讲述私人侦探Cassie Dewell及前警察Jenny Hoyt合作调查蒙大拿州一条偏僻公路的绑架案，在案中有两名姐妹被一名卡车司机绑走。然而当两人深入调查时竟然发现受害者不止两人，现在主角们得争分夺秒下抓到凶手，阻止他再绑架其他女子。