在 JavaScript 中打开整数范围 [英] Switch on ranges of integers in JavaScript

问题描述

我想做这样的事情

    switch (this.dealer) {
        case 1-4: 
            // Do something.
            break;
        case 5-8: 
            // Do something.
            break;
        case 9-11: 
            // Do something.
            break;
        default:
            break;
    }

什么是正确的语法?在 JavaScript 中可以吗?

What is the right syntax for this? Is it possible in JavaScript?

所以 this.dealer 是一个整数，如果它在这些值之间，就做点什么.

So this.dealer is an integer, and if it's between those values, do something.

推荐答案

这是我想出来的另一种方法:

Here is another way I figured it out:

const x = this.dealer;
switch (true) {
    case (x < 5):
        alert("less than five");
        break;
    case (x < 9):
        alert("between 5 and 8");
        break;
    case (x < 12):
        alert("between 9 and 11");
        break;
    default:
        alert("none");
        break;
}

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