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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.三个月前，某市发生了一起恶性绑架杀人案。三个月后，凶手与被害人都死于车祸。初出茅庐的女警韩烨找到了案件的幸存者林超凡，向他求证案件发生的经过。但随着调查的深入，韩烨发现林超凡的很多证词都存在漏洞，再三逼问之下，林超凡无奈坦白了另一个版本的故事，但案件真相远没有这么简单，几乎每个人都在说谎，而故事也开始不断反转。范阳道：按理说彭城那边已经知道了，但消息还没传回来。全剧过程，峰回路转，揭发了许多令人意想不到的情景，构成一幕连一幕的高潮，他们的矛盾冲突也形成了迭起的激情。USA Network续订《罪人》第三季，马特·波莫主演该季！比尔·普尔曼回归出演，普尔曼将继续饰演警探哈里·安布罗斯。他调查一起车祸案件，在调查过程中，他陷入了职业生涯中最危险和最令人不安的境地。 波莫将饰演多切斯特居民，在一场意外中醒来后，他寻求安布罗斯的帮助。你敢担保他们之前没有参与掳走郡主之事？胡钧就呆住了，那求情的军汉也愣住了。