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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.If you don't have a large size, 77 can fly in Northrend only after learning to fly in cold. If you have a large size, go to Dalaran Cold Weather Trainer and buy a 1000G heirloom flight manual and send it to the trumpet, and the trumpet 68 can fly in Northrend.Interception by the Web server is very performance consuming, especially Apache. For a slightly larger attack, this method is useless.历史学家露西·沃斯利带我们走进三处藏有宝藏的皇家宫殿，揭开每一座建筑是如何塑造一个君主政体和一个国家的。通过独家访问白金汉宫最秘密的地方，她揭露了戏剧性的事件，改变了英国历史的进程，从伦敦塔的威吓和汉普顿宫的绝对君主制的兴衰，到现代皇室在肯辛顿宫的面孔。ALT + TK such as quick selection原来五叔就是‘铁笔丹青五柳先生？晚辈听田夫子提过的。