JS数组解构

const myArr=[1,5,3,4,2];
const [first,second] = myArr;   # 提取前两个元素
console.log(first);
console.log(second);

const myArr=[1,5,3,4,2];
const [,,third] = myArr;   # 提取第3个元素
console.log(third);

const myArr=[1,5,3,4,2];
const [,second,...anyE] = myArr   # 提取第2个元素和以后
console.log(second);
console.log(anyE);