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Javascript neither supports abstract classes nor has the concept of interfaces. Therefore, be very careful when using the state mode. If you forget to implement the buttonWasPressed method for a state subclass when writing a state subclass, an exception will be thrown when the state switches. Because Context always delegates requests to the buttonWasPressed method of the state object. Therefore, let the abstract method of the abstract parent class throw an exception directly, which will be found at least during the program run.The algorithm of (8060 +1000) X130% is wrong.鲁南，运河岸边，微山湖畔，有一大片秀美如画的石榴园，一部清新欢快的农村轻喜剧正是在这片令人迷醉的石榴园里热闹的开始了。三十集电视连续剧《石榴花开》以中国社会主义新农村建设为宏观背景，将农村群众最为关心的“土地”问题作为核心线索展开情节，讲述了以正直忠厚的石义、聪明能干的香兰、热心却不讨好的村长士元以及心气儿高、歪点子频出的刘三点等人物为核心的农村群众，为追求各自心中勾画的美好生活，在“土地承包”、“爱情婚姻”、“儿女问题”等等一系列不同家庭的矛盾冲突中盘算着自己的小九九，又因剧中人物不同的个性特点、思想观念、机缘巧合等因素，一连串扣人心弦、令人感动或使人啼笑皆非的小故事发生了。在经历了许多波折后，石榴园里的村民们终于找到了属于自己的幸福归宿。Today, the little finger will take you to learn the operation method of professional mode.《听见你的声音》讲述为了1%存在的国选律师与能读懂对方心灵的超能力少年之间故事的愉快幻想浪漫电视剧。囊括令人心动的罗曼史、扣人心弦的案件以及爆点十足的人物形象，通过国选律师和拥有读心术的超能力少年的故事来展现爱情、成长与人间温暖真情。亨利和法院去首脑会议上与法国签署条约。可以理解的是，紧张局势很高，两位国王的脾气不止一次爆发。与此同时，亨利迎娶了一个新的情妇，名叫玛丽·博林。他很快就厌倦了她，父亲把她妹妹安妮告上法庭，告诉她要想办法维护国王的利益。The policy pattern defines a series of algorithms and encapsulates each algorithm so that they can be replaced with each other, and the changes in the algorithms will not affect the customers who use the algorithms. It is necessary to design an interface to provide a unified method for a series of implementation classes. Multiple implementation classes implement the interface, design an abstract class (optional, belonging to auxiliary class), and provide auxiliary functions. The diagram is as follows: