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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>
- /**
- * Map 键值对集合
- */
- const m = new Map([
- ["name","Lucy"],
- ["age","10"],
- ["address","哈尔滨"]
- ]);
- console.log(m);
- m.set("sex","女");
- m.delete("address")
- // m.clear()
- console.log(m.size);
- console.log(m.get("name"))
- console.log(m.has("age"))
- console.log(m.entries);
- console.log(m.keys);
- console.log(m.values);
- // console.log([...m])
- const arr = [['name','aaa']];
- console.log(new Map(arr))
- </script>
- </body>
- </html>
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