lovecoding
/
vipAllDay


			
				
					
						
						
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<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>