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他重又抬头看了看夏正，后者的确一身正气，但智谋，终究不过如此。Mediator pattern defines a mediation object to encapsulate the interaction between a series of objects. Intermediaries do not need to explicitly refer to each other between objects, thus reducing coupling and independently changing their interaction behavior. The specific structure diagram is as follows:2009.8-20世纪少年：第三部 我们的旗帜创作背景：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 ~就在他想着的时候，却见钟隐走了过来，说道：年轻人，子婴公司的去世，老夫深以为憾，此事之错全在我们。Attribute;