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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:The injured pregnant woman was attacked and sent to hospital, and the baby boy was removed by emergency Caesarean section. At that time, the baby boy was only 35 weeks old and weighed 2.3 kg. At birth, muscle weakness, dyspnea, blue skin, nose and throat must be inserted, skin color only slightly improved. As the baby boy had suffered from hypoxia and low blood pressure, his brain function was damaged and he did not even have instinctive reactions such as expectoration and swallowing. 　　From the King of Destruction上得二楼来，只见碧空如洗，一轮圆月当头悬挂，银辉倾泻，耀得四下里恍如白昼，就是清冷了些。按理说这里面也没杨长帆什么事，但他还是害怕，害怕事情搞大了，出几条命案，海瑞怒极，以造反之类侵犯朝廷权威的理由来搞事，那即便是杨寿全也担不起了，自己搞不好还会莫名其妙成为同党。在罗布奥特曼中，讲述的是和之前的奥特曼完全不一样的剧情。主人公一共有4个，分别是哥哥胜巳和弟弟勇海，女高中生妹妹，和父亲，他们一起经营着一家生活商品店。但是，命运往往都是不可捉摸的。就在看似平静的日子里，实则蕴藏着杀机。有一头怪兽，从天而降。而这头怪兽，也让原本平平淡淡的一家，完全改变了命运。