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列维·施瑞博尔、强·沃特主演Showtime剧集《清道夫》宣布续订第7季，明年春天开拍。The Source class is a decorated class, and the Decorator class is a decorated class. You can dynamically add some functions to the Source class. The code is as follows:?嗯？徐风反应了一下，才听听话地退了一步，干嘛？再退一步。2019 title Baozhu Daquan NEW!I don't care whether you are Baidu's written examination or Ali's or Tencent's pen examination questions. My side is collectively referred to as the WrittenTest. Then your company has different pen examination questions, which will be implemented by subclasses. No matter how the parent class method is implemented, I don't care what the pen examination questions are. The code changes to the following: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 ~