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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?"During the 20-day Shanghai International Film and Television Festival, the entertainment team completed 33 original articles, including 12 in-depth and feature reports. Senior editor Fei Xu has completed more than 10 original reports while arranging the trip, organizing reports and editing work. The film festival report on the interface has received high recognition from relevant departments in Shanghai.NBA game is 48 minutes, divided into 4 quarters, each quarter is 12 minutes.天下第一剑诀《独孤九剑》，再现江湖。The picture is from the simple book AppTypical flow of the asynchronous blocking I/O model (select)于邪魔外道而言，他们是令人欲除之而后快的眼中钉肉中刺