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Public User (Mediator mediator) {2 理发店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:Microsoft Office is arguably the most widely used office software. However, because of this, it has also become one of the main targets of hackers. For example, the Red Team will use it to steal domain hashes and even execute arbitrary codes in the network security competition.墨西哥裔女孩克劳丽娅自幼和母亲在美国一起生活。由于过度宠爱，不知天高地厚，年纪轻轻就犯下大罪，被羁押回故乡墨西哥。剧情就此展开.....亲兵跟随龙且身边不久，立功心切，拔剑便向屏风看出。