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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?"该剧讲述了述情障碍总裁与格斗保镖少女之间的甜蜜爱情故事。周芷若发现，一切都变了，张无忌离她越来越远，她开始不知所措。果然，半天后，黎章他们身后没了敌人的踪影，都被卫江那批人吸引过去了。Bridge.setSource (source1);Another form of SYN flooding attack is IP address spoofing. It is a little more complicated than direct attack. Attackers must also be able to replace and regenerate the original IP message with valid IP and TCP message headers. Today, there are many code bases that can help attackers replace and regenerate original IP messages.