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听说这次爱卿又立了大功，高兴的很We can see the above code. The code for creating div is very similar to the code for creating iframe. We can now consider separating the common code to make the code completely abstract. We can now write a set of code that is encapsulated in the getInstance function, as follows:刑警田志平二十年前收养了他亲手逮捕的罪犯苇子的女儿小梅，并与小梅的母亲卜玉琴结婚。二十年过去了，从襁褓中长大的小梅丝毫不知田志平并非她的亲生父亲，一家人相亲恩爱。被判无期徒刑的苇子经过改造后立志重新做人，争取提前释放，待出狱后寻找一直深爱的妻子卜玉琴和女儿平安地过下半生。Countries still keep their cards, so no one can know for sure which countries are capable of launching the largest attacks. As far as the United States is concerned, Russia is the biggest threat. The country has proved that it is both capable and willing to actively launch digital attacks.Iterator pattern provides a way to access each element in a collection object sequentially without exposing the internal representation of the object, which can not only not expose the internal structure of the collection, but also allow external code to transparently access the internal elements of the collection. The specific structure diagram is shown below.The intermediary mode is also used to reduce the coupling between classes, because if there is a dependency relationship between classes, it is not conducive to the expansion and maintenance of functions, because as long as one object is modified, other related objects have to be modified. If you use the mediator mode, you just need to care about the relationship with the Mediator class, the relationship between specific classes and the scheduling to the Mediator, which is a bit like the spring container. Let's look at the picture first:当晚，杨长帆夫妇慌得连滚床单的热情都没了，杨长帆觉得这也是对的，如果暴富后一心想着高兴，想着如何去挥霍炫耀，那是真守不住了，居安思危想好退路还能活久些。