将数学运算符存储在变量中？

Question

问题很简单，但是我还没有找到想要的东西。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，但是使我能够动态更改操作员的一切都很好。有什么想法吗？

Answer 1

您可以从Number更改为eval方法

const firstNumber = 5;
const secondNumber = 3;

let operator = "-";

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

const unfortunatelyNaN = eval(string);

console.log(string, unfortunatelyNaN)