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Of course, the software design pattern is only a guide. In actual software development, it must be selected according to specific requirements:Code as above; Write three functions of order500, order200 and orderNormal respectively, and process their own business logic in the functions respectively. If their own functions cannot be processed, they will return the string nextSuccessor to pass it back, then encapsulate the constructor Chain, pass an object fn into it, and have their own attribute Successor. There are two methods setNextSuccessor and passRequest on the prototype. The method setNextSuccessor specifies the order of nodes in the responsibility chain, and saves the corresponding method to the attribute this.Successor, chainOrder500. SetNextSuccessor (chainOrder200); ChainOrder200. SetNextSuccessor (chainOrderNormal); Specifies the order in the chain, so this.Successor references the order200 method and the orderNormal method, so if chainOrder500.passRequest (1, true, 500) is called for the first time, the order500 method is called, output directly, and chainOrder500.passRequ is called for the second time.范增见状知道今日已经失了先机，想要名正言顺杀刘邦已经不可能了。Let's take a look at the difference between this script:究竟不懂恋爱的小光，会不会和荠恋爱，并成为吸血鬼呢！？来到东洛杉矶篮球队。在一名意志坚定的教练的带领下，这些小伙子希望发挥自己的潜力，升入大学。