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感谢亲们支持，今日争取三更。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 ~电视剧《黎明前的抉择》由南京瑞星影视文化传播有限公司，江苏艺星影视文化传播有限公司， 江苏幸福蓝海中天龙影视传播有限公司联合出品。2014年5月6日晚已在天津卫视黄金档播出。这是何等的可畏可怖？难怪让人震撼不已。林聪忙道：黎指挥自然令人敬佩，属下可不敢当这夸赞。由一代武打巨匠刘家良师傅执导又一功夫之作《螳螂》，当年有刘家辉、黄杏秀、李丽丽及姜大卫坐镇演出，为观众活现“螳螂拳法”。