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青山忙道：你掰吧，你掰吧。I. Collision Inspection of BIM Technology in Metro Station Comprehensive Pipelines《最亲爱的你》是由华策影视出品，霍尔果斯瞰心晴娱乐承制，龙亚担任制片人，张赟编剧，丁梓光执导，虞书欣、王妍之、何蓝逗、杨之楹、王薇、赵志伟、曹曦戈、胡文喆、杨逸飞、李九霖等主演的半糖主义青春片。Although the above code can meet the requirements, it is not easy to expand and difficult to read. If I want one or two conditions in the future, if I want to recharge 300 yuan successfully, I can win the 150 yuan red envelope, then I have to change the code inside at this time, so the coupling between business logic and code is relatively high, and I accidentally correct the wrong code. At this time, we try to use the responsibility chain mode to transfer objects in turn to realize it.The transformation of K12 discipline education institutions, relying on the original discipline system to enter the track of children's thinking ability training,Bestfitting's Kaggle Home PageNext, we will talk about the responsibility chain mode. There are multiple objects, each of which holds a reference to the next object, thus forming a chain on which requests are passed until an object decides to process the request. However, the sender does not know which object will process the request in the end, so the responsibility chain mode can be implemented to dynamically adjust the system without concealing the client. Let's look at the diagram first: