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1. Written examination: (Different companies have different written examination topics).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.1. Modify the original method to adapt. This violates the principle of "opening up to expansion and closing down to modification."觉醒的人・佛陀、神之子・耶稣。为了挑战相声比赛而努力制作素材，或是在为了避暑而进入的家庭餐厅长时间逗留，或是在卡拉OK包厢里引起神灵般的演出，依旧是圣人搭档的可爱下界圣活。父王你去哪里了？好长时间没见到你，杰儿重了，也长高了，已经开始学着读书了，可是父王一直都不在。　　飘零的雪花迎来了每年一度的情人节。