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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?"However, although this book is co-written, the story it tells is only the story of one of us (Eriksson), who has been studying outstanding figures with great concentration since he grew up. Therefore, we chose to write this book from his perspective. The person "I" appearing in the book should refer to him. However, this book is the crystallization of our joint efforts to describe this very important topic and its meaning.《W》是奇幻爱情电视剧，是讲述30代初半男女们的故事。有影响力的银行家马特维莱文（Matvey Levin）不遗余力地避免与私生子分享财富。但当他失去一切时，人们发现只有他们才能帮助他。为了恢复自己的财富，马特维将不得不在蒙特卡洛抢劫自己的银行。要做到这一点，他首先需要进行一项更具挑战性的行动：他必须重新获得疏远的孩子们的信任。过目不忘的高俊与特异功能的好友周星星，将异能用在赌博上，误打误撞下结识了南中国雀神达叔。二人得达叔指教赌术，横扫地下赌场。二人后来参加赌王大赛，并杀入决赛，但有人暗中捉走俊的嫲嫲作要胁，令这场世纪之战峰迥路转……徐文长俯身点了点地图，这一点同样困扰了我很久，不过我在应考的时候已经想通了。Resolution: