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After studying the design pattern during this period of time, I still have a lot of feelings, because when I am writing code now, I often think about whether I can use any design pattern to refactor here. Therefore, after learning the design pattern, I feel that it will slowly affect the way you think about writing code. Here is a summary of the design patterns. First, all the design patterns can be sorted out. Second, an index can be made to help everyone collect.这对争吵不休的昔日恋人，高中时曾拍过一部爆红纪录片。因为这部作品，两人时隔多年又被拉回镜头前，也回到彼此的生活中。Cultural Value: Inherit and carry forward one's surname culture and leave valuable books for later generations; Reputation Value: The central bank's credibility is guaranteed and trustworthy. The surname card can be made according to the needs of different surname origins and cultures. The seal-shaped solid wood with exquisite cover can be customized according to different surname requirements.A chilling glimpse into the first-person accounts from people who have witnessed horrifying, peculiar, extraordinary supernatural events and other unexplained phenomenons that continue to haunt them.By function: