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尹旭轻轻一笑：绿萝姑娘，说起来真有些不好意思，现在有些事情就需要麻烦您一下。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 ~。。。叔叔壮烈的异世界生活和侄子敬文的新感觉异世界喜剧拉开了帷幕！三更求粉。We can also add some parameters to the callback function, such as shoe color, shoe size and other information;5. Ships shall not normally enter the separation zone or cross the separation line except through ships or ships entering or leaving the navigation separation unless: