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求订阅求粉红。Factory Pattern: Factory Pattern is a frequently used pattern. Classes implemented according to Factory Pattern can generate instances of one of a group of classes according to the provided data. Usually, this group of classes has a common abstract parent class and implements the same methods, but these methods perform different operations for different data. First of all, we need to define a base class. Subclasses of this class implement methods in the base class through different methods. Then you need to define a factory class that can generate different subclass instances according to conditions. After getting an instance of a subclass, developers can call methods in the base class regardless of which subclass instance is returned.2. Os.getcwd ()--Gets the current working directory.《星座方程式》是国内第一部以“星座”为主题的网络季播剧，现共2季，用独立的24个小故事讲述星座主人公的爱情遭遇，并融入青春、惊悚、悬疑、奇幻、鬼魅等新鲜元素。“守信”最初是由S4C开发的，是一种无趣的美世产品。Vox Pictures与APC和Nevision联合为BBC威尔士和S4C制作。由皮普·布劳顿和朱迪思·丁导演，马修·霍尔和皮普·布劳顿编剧，皮普·布劳顿和利尔·莫鲁斯制作。让我们得意撤退到淮南暂避，或者请越军帮忙……向越国投降？不是投降，唉，说不清楚了。理查德·E·格兰特、莎莉·菲尔德、爱娃·林德丽加盟，由杰森·席格尔创作及主演的AMC全新诗选剧《日常谜团》。该剧描述一群平凡人跌跌撞撞进入日常生活中潜藏的谜团之中，他们将发现此谜团根深蒂固的程度远远超过他们的想像。格兰特将扮演一个秘密组织的魅力领袖。菲尔德将扮演一位失去丈夫的家庭主妇。林德丽将饰演一名跨性别女性，她从研究生院辍学，目前在一家艺术博物馆担任讲解员。这部10集的电视剧将于今夏在费城开拍。