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For example, I now need to create a div element on the page. Then we definitely need a function to create the div, Now all I need is this function, which is only responsible for creating div elements. It doesn't want to take care of the rest, That is, to realize the principle of single responsibility, Just like Kissy on Taobao, At the beginning, they defined Kissy to do only one thing and did it well. The specific instantiation class in the monomer mode was handled by the agent function. The advantage of doing so was that the specific business logic was separated. The agent only cared about the business logic of the agent. Here, the function of the agent was to instantiate the object and instantiate it only once. Create div code just create div, the others don't care; The following code:而另一方面，他们共同的好友巴尼（尼尔·帕特里克·哈里斯 Neil Patrick Harris 饰）和罗宾（寇碧·史莫德斯 Cobie Smulders饰），在经过了一年的情感挣扎与斗争，他们终于搞在一起了。莉莉对此感到相当开心，但是巴尼、罗宾二人却难以定位彼此之间的关系。在三个好友的帮助下，他们能不能确定男女朋友关系？陈平道出了越国此战的核心任务。There are five kinds of creation modes (1-5): factory method mode, abstract factory mode, singleton mode, builder mode and prototype mode.We can also look at docker's hello-word and execute the following command docker run hello-world. Since the first execution, the local docker　　一场敌暗我明的拉锯战就此展开……