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What should we pay attention to before selecting teachers?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?"If you make a turn along the famous subway line, you will basically reach it.张无忌一掌劈出，就要了结赵敏的性命。武士统治日本的时代……泥鳅姑姑站起身，拍着手道：不提？我在家忙得昏天黑地的。Advanced system variables; Environmental variables;