重学ES系列之Set实现数组去重、交集、并集、差集

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发布于 2022-06-16 11:20:07

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发布于 2022-06-16 11:20:07

文章被收录于专栏：高端IT

<!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>

更多内容请见原文，原文转载自：https://blog.csdn.net/weixin_44519496/article/details/119836538

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