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2. The new operator is omitted, the usage frequency of system memory is reduced, and the GC pressure is reduced.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?"《谁都渴望遇见你》是由爱奇艺、析微影视联合出品，赵薇监制的爱奇艺自制网台剧。 在“不完美”的原生家庭长大的张泯，与懂得天上所有星座却唯独不知自己身世的陶伦，因一位能与植物对话的负离子女孩罗溪，被命运拴到了一起。创伤与治愈、爱情与亲情的紧密交织，吟唱出一段关于疗愈、浪漫、温情的恋爱心曲。这些以往她都不感兴趣，可是葫芦哥上战场了，她忽然对这些就感兴趣起来。可远未到见怪不怪的境界，何况还是汉初三杰的萧何，而且还是主动前来求见，能不激动吗？尹旭起身道：萧何先生，你是沛公刘邦派来的？有事找我们？沛公刘邦？何方神圣？英布坐在一边努力地思索着，记忆里似乎并无此人。