欧美大胆人人本艺术西西CD

喂，黄老师昨天多谢你了。　　蜀汉五虎将，千古传诵；常山赵子龙，忠勇流溢，万世流芳。By writing poems, he forced himself to come up with a large number of other different words, which he usually did not think of.Include a multifunctional output circuitIn 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.Supplement: Use the "shadow instance" method to update the attributes of singleton objects synchronously.