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Next, we are going to implement the Validator class, which is used here as Context and is responsible for receiving the user's request and delegating it to the strategy object, as follows:Having seen too many life and death, Huang Weiping often feels powerless. People often think carefully about the proposition of "life and death" when they are dying, but it is too late. At that time, patients and their families are mainly faced with a series of practical problems and have no time to take care of more metaphysical things.尉缭道：现在的越国已经今非昔比的，越国国内秦系力量太过强大，如果子夜再为王后，就有些太过庞大了，这是越王不希望看到的。Gu Xiqian knew the value of sweet potatoes, but this period …刘盈才不到十岁的年纪，如此早就剥夺了他活着的权利太过残忍。你看中啥，只管拿，将来从我嫁妆里边扣就是了。Then execute return this.success & & this.successor.passRequest.apply (this.success, arguments); This function goes to FN2, prints 2, and then there is a setTimeout timer asynchronous function, which needs to request to the next node in the responsibility chain, so 3 will be printed after one second.