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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?"明明学会了最强的《独孤九剑》，不求能一剑横行，戮尽天下高手，但也不能憋屈成这样。8. The term "ship limited to draft" refers to a motor ship whose ability to deviate from its course is seriously limited due to the relationship between draft and the depth and breadth of navigable waters.Syfy宣布续订《#凡妮莎海辛# Van Helsing》第三季，新季为13集，预定明年2月开机拍摄。坐看孙悟空成为当代人皇。货真价实的武士刀，精钢上品，正是砍在自己胸口的那一柄。故事发生在1941-1945年间。由于战争爆发，五个好友被迫离开家乡，被迫离开彼此，三个去了东线，两个留在了柏林。这场战争带来的不光有牺牲，还有终生难忘的痛苦回忆。他们中有些人的加入是出于某种目的，而其他人却痛苦地挣扎于良心道德与国家责任之间。