马克社区,马克吐温社区,马克java社区重学ES系列之Set实现数组去重、交集、并集、差集

重学ES系列之Set实现数组去重、交集、并集、差集

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Set实现数组去重、交集、并集、差集</title>
</head>
<body>

</body>
<script>
let {log} = console;
let arr = [1,2,3,3];
let arr1 = [1,2,3,3,5];
// 去重
let set1 = new Set([...arr]);
log([...set1]);// [1,2,3]
// 并集
let set2 = new Set([...arr, ...arr1]);
log([...set2]);// [1,2,3,5]
// 交集
let set3= new Set([...set1].filter(x=>new Set([...arr1]).has(x)));
log([...set3]);// [1,2,3]
// 差集
let set4 = new Set([...set2].filter(function (x) {
    return !set1.has(x)
}))
log([...set4]); // [5]

let setarr1 = new Set([1,2]);
setarr1.add(0);
log(setarr1);
setarr1.delete(2);
log(setarr1);
</script>
</html>

作者：Vam的金豆之路

主要领域：前端开发

我的微信：maomin9761

微信公众号：前端历劫之路

前端高级