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@@ -0,0 +1,49 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+<head>
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+ <meta charset="UTF-8">
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <title>Document</title>
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+</head>
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+<body>
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+ <!--
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+ map 类似于对象 键值对中的对象
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+ set() 设置集合中的键值对
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+ get() 获取集合中键值对属性值
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+ has() 查找集合中的属性是否存在
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+ clear() 清空集合
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+ -->
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+ <script>
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+ let m1 = new Map();
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+ console.log(m1);
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+ let m2 = new Map([
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+ ["name","Tom"],
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+ ["age","10"]
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+ ])
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+ console.log(m2);
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+ m2.set("sex","男")
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+ console.log(m2.get("name"));
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+
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+ console.log(m2.has("age1"));
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+ // m2.clear()
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+ console.log(m2);
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+
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+
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+ let list = [34,45,56,67,78];
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+ list.map((ele,index)=>{
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+ console.log(ele,'a',index)
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+ })
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+
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+ for(let k of m2.keys()) {
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+ console.log(k)
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+ }
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+ for(let k of m2.values()) {
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+ console.log(k)
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+ }
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+ for(let k of m2.entries()) {
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+ console.log(k)
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+ }
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+
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+ </script>
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+</body>
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+</html>
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