摘要：
1. Number.isFinite 检测一个数值是否为有限数 console.log(Number.isFinite(100))； //true console.log(Number.isFinite(100/0))； //false console.log(Number.isFinite(Inf 阅读全文
摘要：
let arr = [1,2,3,4,5,4,3,2,1]; 1. 数组去重 let result = [...new Set(arr)]; console.log(result); // [1,2,3,4,5] 2. 交集 let arr2 = [4,5,6,5,6]; let result = 阅读全文