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The policy pattern defines a series of algorithms and encapsulates each algorithm so that they can be replaced with each other, and the changes in the algorithms will not affect the customers who use the algorithms. It is necessary to design an interface to provide a unified method for a series of implementation classes. Multiple implementation classes implement the interface, design an abstract class (optional, belonging to auxiliary class), and provide auxiliary functions. The diagram is as follows:40 ℃About 7 to 8 o'clock, there may be meat in the middle of the night.Attack targets include: large amount of data operations, database access, large memory files, etc.It was not until the third day that the defenders left the police station after confirming that the second boss must report to the police station every day.30年代的上海，大富豪井家育有二子二女，父亲迎娶二姨太宝珠后，宝珠与恋人沈斌合谋使井家败落。井家二姐妹同时爱上了医师高尚谦，妹妹莉梅摔伤了脚致跛残，姐姐莉雪促成了妹妹的婚事，远走他乡。5年后，莉雪终于在风雪中回到了充满回忆的老地方，就在这天夜里，莉雪的住处发生命案，而死者竟是当年井家的仇人...岁月荏苒，杜拉拉早已不是那只升职路上匍匐前进的职场菜鸟 她坐镇SH人事经理已驾轻就熟，不日就要问鼎总监级别；和王伟的甜蜜恋情瓜熟蒂落，领证结婚过上了幸福的二人世界。