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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.沈悯芮在旁解释道：此去杭州，长帆深受通政司通政使，工部侍郎赵大人赏识，即日便上书巡抚，封会稽祈海祭酒。During the DNS NXDOMAIN Flood attack, multiple queries will be made to the DNS server, making the cache of the DNS server store the query results of the attacker, eventually causing the speed of DNS resolution requests of normal users to slow down.想起范增过往的种种，以及今日交待的事情，项羽再也忍不住心中的悲伤，扑在范增身上痛苦不已，虞姬也是站在一边，泪珠子不断从眼眶里滑落。一直希望靠小聪明获得成功的马进，事业和爱情屡屡受挫，甚至将自己的希望都寄托在他人身上。在一次公司集体活动中，一行人遭遇意外流落至荒岛，从此众人的命运发生了翻天覆地的变化。世界观、设定根本不统一。昨晚，他和青木先去拜访周夫子，告知胡老大已死之事，商议了一个时辰，然后又去苏文青家，密议到四更天才回郑家。