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　　爱之助左眼总能看到映像到底有什么意义？未知的犯罪组织又是出于什么目的使得爱之助夜夜受惊？爱之助唯一的亲人、他最爱的哥哥究竟为何而死？ 　　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 ~2. It is very difficult to win the competition only by using some mature methods, especially in the in-depth learning competition, so we need to give more creative solutions;By LemonThe Liskov Substitution Principle (LSP) is one of the basic principles of object-oriented design. The Richter substitution principle says that wherever a base class can appear, subclasses can certainly appear. LSP is the cornerstone of inheritance reuse. Only when derivative classes can replace base classes and the functions of software units are not affected can base classes be truly reused, and derivative classes can also add new behaviors to base classes. The Richter substitution principle is a supplement to the "open-close" principle. The key step to realize the "open-close" principle is abstraction. The inheritance relationship between the base class and the subclass is the concrete realization of abstraction, so the Richter substitution principle is the specification of the concrete steps to realize abstraction. --From Baidu　　尹平安调至其兄生前驻守的警局，方正暗中授其枪法，使其枪法大进。同时，平安在一次办案中结识敖明，二人坠入爱河，当平安查出敖明是杀手，且怀疑其是杀兄仇人时心中困扰不已。剧情曲折，武打动作场面震撼－中神通王重阳，故事叙述宋金年间道教候任掌门天生（关礼杰）与程若诗（周慧敏）互生情愫而结合，后诗怀有身孕，天生决与诗抛弃一切逃往古墓。后发觉师兄玄生（林尚武）勾结金人夺取圣物「九阴真经」，天生为救同门与镇关守将霍景山（张翼）驱逐金人。