javascript - 将数学运算符存储在变量中？

Question

问题很简单，但我还没有找到我想要的。基本示例：

const firstNumber = 5;
const secondNumber = 3;

let operator = "-";

const string = `${firstNumber} ${operator} ${secondNumber}`;

const unfortunatelyNaN = Number(string);

console.log(string, unfortunatelyNaN)

以上只是我的思维方式，但任何让我能够动态更改运算符的东西都可以。有任何想法吗？

Answer 1

您可以从Numbertoeval方法更改

const firstNumber = 5;
const secondNumber = 3;

let operator = "-";

const string = `${firstNumber} ${operator} ${secondNumber}`;

const unfortunatelyNaN = eval(string);

console.log(string, unfortunatelyNaN)