HaiJing1995的博客

使用ES6的Set去除数组的重复元素方法一Array.from()方法可以将Set结构转化为数组结构function dedupe(array) { return Array.from(new Set(array)); }dedupe([1,2,3,3]);方法二扩展运算符（…）内部使用for…of循环let arr = [1,2,3,3]; let unique = [...new Set

JS实现并集，交集和差集 var set1 = new Set([1,2,3]); var set2 = new Set([2,3,4]);并集let union = new Set([...set1, ...set2]);交集let intersect = new Set([...set1].filter( x => set2.has(x)));差集let difference =