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As the name implies, iterator pattern is to access objects in an aggregation sequentially. Generally speaking, it is very common in collections. If you are familiar with collection classes, it will be very easy to understand this pattern. This sentence contains two meanings: one is the object that needs to be traversed, that is, the aggregated object, and the other is the iterator object, which is used to traverse the aggregated object. Let's look at the diagram:(3) Static Factory Method Mode　Jack Reacher在小说中曾经是美国陆军的军警，离开美军后他以调查员身份接手调查一些可疑或有危险性的案件。这是一个女人奋斗的传奇，这是一个屡败屡战直到最终成功的经营传奇，经营的不单是子君的酒店，而是她的人生。年过中旬的杰克是位银行网络安全高级主管，他凭其精于计算机防盗设计的经验备受高层重视。银行盗匪比尔绑架了杰克家人，并胁迫杰克为他们盗取银行一亿美元现金。为了家人杰克以身犯险，和罪犯展开了斗智斗勇的对决。6. Enjoyment Model学霸乖乖女陆七一（王子璇 饰）伪造录取通知书，欺瞒父母进入南方艺术大学，没想到，文化课的学霸很快沦为了艺术院校的奇葩。性格内向不善表达的陆七一，在这所艺术院校开始了艰难的升级打怪路。 不过，真诚善良的陆七一也受到了方岩（龚俊 饰）和杜昂（周澄奥 饰）两位男神的青睐。曾经与陆七一在艺考中不打不相识的方岩，似乎也越来越喜欢这个勇敢又有冲劲的女孩...