| 12345678910111213141516171819202122232425262728 |
- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0">
- <title>Document</title>
- </head>
- <body>
- <script>
- var arr = [1,2,3,4,3,3,5,7,213];
- var x = new Set(arr);
- console.log(x,'set后')
- console.log(Array.from(x));
- // size 长度
- console.log(x.size)
- // 数组去重
- function fn1(aa) {
- return Array.from(new Set(aa));
- }
- console.log(fn1([1,2,1,1,1,1,1,2,2,2,3,4,3,4,33,2]));
- // 添加 xxx.add()
- console.log(x.add("哈哈"))
- // 删除 xxx.delete(要删除的值) 成功则返回true
- console.log(x.delete(3));
- console.log(x);
- </script>
- </body>
- </html>
|
