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This is the difference between the thinking of the poor and the thinking of the rich: the thinking of the poor is characterized by living within our means, while the thinking of the rich is characterized by goal orientation.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.袁小姐，我想可能是我自作多情了，但我还是想说一句，我已经有妻子了，我们是不可能的。从郊区的家里被送去汽车修理店工作后，一名年轻男孩的生活有所改变，直到一次契机迫使他做出艰难抉择。栏目通过版面以及动画片、动画电影和节目，丰富同学们和小朋友们的精神生活。嬉笑间，忽然从外面跌跌撞撞跑进来一个小子，对黄瓜兄弟几个道：二少爷，三少爷，快……快回去。