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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 ~More literal, more literalKorean title:? ?Connection conn = null;在第N次找工作失败之后，陈美又遇上了令人痛心的事情——大专时代暗恋的学长魏振国被她的死对头，艳光四射的模特儿关丽莎抢走。这让陈美痛下决心，一定要改变自己平凡普通的外貌，摆脱先天不足，成为后天美女！可是并不急在这一时三刻。尤其是小鱼儿出身恶人谷，但是并没有学到恶人们的恶，虽然有些调皮捣蛋，喜欢恶作剧，但内心还是善良的，在江湖上也留下不少义举。