lovecoding
/
Web1020


			
				
					
						
						
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							<!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>
        // let m1 = new Map();
        // m1.set('a',1);
        // m1.set('b',2);
        // m1.set('c',3);
        // m1.set('d',4);
        // m1.delete("d");
        // console.log(m1.has("a"));
        
        // console.log(m1.get("b"));
        // m1.clear();
        // console.log(m1.size);
        // console.log(m1);

        let wm1 = new WeakMap();
        wm1.set({name:"张三"},1);
        console.log(wm1);

        
        var arr = [1,2,3,5,5,6,8,8,9];
    </script>
</body>
</html>