es6数组取交集/并集/合集/去重

var a = [1,2,3,4,5]

var b = [2,4,6,8,10]

console.log("数组a：", a);

console.log("数组b：", b);

var sa = new Set(a);

var sb = new Set(b);

// 交集

let intersect = a.filter(x => sb.has(x));

// 差集

let minus = a.filter(x => !sb.has(x));

// 补集

let complement  = [...a.filter(x => !sb.has(x)), ...b.filter(x => !sa.has(x))];

// 并集

let unionSet = Array.from(new Set([...a, ...b]));

console.log("a与b的交集：", intersect);

console.log("a与b的差集：", minus);

console.log("a与b的补集：", complement);

console.log("a与b的并集：", unionSet);

//去重 2种方法

const arr = [1,1,1,23,4,5,6]

let newArr = Array.from(new Set(arr))

let newArr1 = [...new Set(arr)]

console.log(newArr,newArr1)