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In the above code, we use three functions, order500, order200, orderNormal to handle its own business logic, If the current own function cannot handle things, We pass it to the following function to handle it. By analogy, Until there is a function that can handle him, Otherwise, the responsibility chain mode will leave the chain directly, telling that it cannot be processed and throwing an error prompt. Although the above code can be used as the responsibility chain mode, we can see from the above code that the Order500 function depends on functions such as Order200, so there must be this function, which also violates the open-closed principle in object-oriented. Let's continue to understand writing flexible and detachable responsibility chain nodes.如果你能触摸我When we were young, chasing girls, the older ones told us the experience of being bold, careful and thick-skinned. In fact, doing business is like chasing girls.她制定了标题为他在等我让他回来的计划,她暗恋的人将在46天后结婚,需要他在此之前爱上她。她最好的朋友Khanittha伸出援手。期待众多仙佛人魔妖打到天崩地裂。身旁的徐文长无奈摇头：是个消遣的好地方。