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If I were to implement a pizza ordering system, I would definitely write the code like this, because this kind of code can be written subconsciously without consuming our brains. However, take a closer look at this code: the purpose of this method is to order pizza. However, the code for ordering pizza also needs knowledge about the production of pizza. This method must know all pizza. Worse still, if the types of pizza are to be expanded or pizza with poor sales volume are to be deleted in the future, then the code for ordering pizza will be modified. It looks very bad and should be revised. Our first step must be to separate the code for producing Pizza from the code for ordering pizza, because you should not let the code for ordering Pizza know the logic for producing pizza, but should hand over the logic for producing Pizza to a special type. In this way, we can cope with future changes-if we want to add or delete pizza, we can directly modify the producer of pizza without affecting the logic of ordering pizza.爱情，从来行动大于言语 威伦，一个出生在情人节的年轻人，却从来不知道爱情——甚至连他父母的爱都不知道。他碰到了一个对他表现出同情和温柔的人。此剧讲述一个拼命向上流而掩盖自己原来身份的男人，与一个为了爱情而抛弃亲妹的女人，两人内心挣扎地争取真正幸福生活的故事。愣是把胡家狠狠踩踏，胡家可以说身败名裂，连庞家也大跌脸面。等到通晓了独孤九剑的剑意，则无所施而不可，便是将全部变化尽数忘记，也不相干。精分猫妖带着前世记忆重生，扬言要找前世恋人复仇，但是看到他就好想亲亲扑倒怎么办？！看史上最没节操的女主在高冷禁欲男神和邪魅冷艳妖王之间，如何抉择！盛唐集团总裁唐宗突然离世并留下遗训,让他的儿子唐森（白客 饰）在穷小子武空（王宝强 饰）的陪同下前往印度寻找遗嘱。在印度巧遇自恋臭美却又忠诚的朱天鹏（岳云鹏 饰）,以及美丽性感却深藏秘密的美女吴静（柳岩 饰）,四人兜兜转转竟结为同盟,而最令四人不解的是为何这次取遗嘱之旅凶险重重,危机四伏,并且遗嘱之所以放在印度，更是隐藏着秘密。