数组 - 25map - 《html-css-js》

<!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 = [
            {name:"html",value:"12px"},
            {name:"css",value:"13px"},
            {name:"vue",value:"11px"},
        ]
        /* 
        var res = [
            {name:"html",value:24},
            {name:"css",value:26},
            {name:"vue",value:22},
        ]
         */
        arr.map(item=>{
            var value = parseInt(item["value"])*2;
            return item["value"] = value;
        })
        console.log(arr);
    </script>
</body>
</html>