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　　创伤不是撕裂灵..他正处在变声期，又满含激愤，声音未免有些尖锐、高亢，胡镇被刺激得焦躁难耐，几乎要暴走。Instruction刘邦很是无奈，本来恰到好处得些利益，没想到被熊心这个小崽子摆了一道，落得尴尬局面。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 ~陈启笑着说道：我叫陈启。