交换两个变量的值的几种方法

JavaScript扩展1--这篇主要是交换两个变量的值的几种方法的总结

交换两个变量的值的几种方法

方法1 设置一个中间变量

let cup1 = "a";
let cup2 = "b";
let temp = cup1
cup1 = cup2
cup2 = temp
console.log(cup1,cup2);

方法2 数组的解构赋值

let cup1 = "a";
let cup2 = "b";
[cup1,cup2] = [cup2,cup1];
console.log(cup1,cup2);

方法3 放在一个数组，通过索引交换

let cup1 = "a";
let cup2 = "b";
let arr = [cup1,cup2]
cup2 = arr[0]
cup1 = arr[1]
console.log(cup1,cup2);

方法4

let cup1 = "a";
let cup2 = "b";
cup1 = [cup2,cup2=cup1][0]
console.log(cup1,cup2);