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After understanding the history and classification of design patterns, how should we learn design patterns? Before learning the design pattern, readers must establish a kind of consciousness, that is, the design pattern is not only a method and technology, but also an idea and a methodology. It has nothing to do with the specific language. The main purpose of learning design patterns is to establish object-oriented ideas, program to the interface as much as possible, with low coupling and high cohesion, so that the programs you design can be reused as much as possible. "Specious. Learning design patterns can better understand object-oriented ideas. Design patterns are some design skills and tricks. Don't rise to ideas and methodologies, okay?"许愿（夏雨饰），北京潘家园小古董店\"四悔斋〃的老板，古董鉴宝界最具权威的\"五脉梅花\"家族之一许家，唯一的传人。为了楸出隐藏在五脉之中的〃老朝奉〃造假势力，许愿孤身一人入局破局，与 庞大的古董造假集团展开层层较量，却被设局指引牵扯出两幅《清明上河图》真赝难辨的惊天秘密。随着迷局的层层解开，境外神秘的造假势力也浮出水面，而这些竟然都与当年许愿爷爷的护宝冤案有着千丝万缕的关系。为了查出前世真相，许愿再度联手投靠于\"老朝奉\"的药不然（魏晨饰），但不曾想这所有的一切都尽在老朝奉的掌握之中，而老朝奉势力的背后还藏着更大的谜团。一具被发现的白骨引 起小镇的轰动，刑侦队长张建宇（张译 饰）接手此案，展开调查。在案件的艰难推进中，一个个身份各异的人也被卷入此案：稀里糊涂的酒鬼，一心想发横财的屠夫申哥（周一围 饰），风流倜傥的音乐家李志民（郭晓东 饰），性感的脑科医生韩云（余男 饰）......当迷局浮出水面，谁是真正的罪人？莫非他是发现了我们和蒯彻之间有联系，故意打压我们？对此彭越略微有些担心。2. All state-related behaviors are packaged in the buttonWasPressed method. If strong light, super light and ultimate strong light are added to this lamp in the future, it will be impossible to predict how much this method will expand. Of course, in order to simplify the example, when the state changes here, simply print a log and innerHTML that changes the button. In actual development, there may be much more things to deal with, that is, the buttonWasPressed method is much larger than it is now.在一间教学素质低下的学校里，有一个不成文的传统：学生们凡是遇到了争执，都不能告诉老师家长，只能自己用拳头解决。石头是最能打的一个同学，一次帮助富家子Edward解围，彼此成为朋友，二人也因此得罪了学校里的好战分子。阿凤一直暗恋既帅气学习有出色的Edward，而Edward认为学生最紧要是学习，会考时间逼近，Edward便义务帮助石头与阿凤补习。由于家境富有，Edward竟然在考试当天被绑架了，石头决心把他救回……Before the match, lots will be drawn to determine the number of matches. The participants will tie up the ropes themselves. The referee will arrange the positions and supervise.