<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script type="text/javascript">
        const _rank = array => {
            // 补全代码
            array.forEach(item => {
                //为原对象添加sum属性
                item['sum'] = item.chinese + item.math + item.english;
            })
            array.sort((a, b) => {
                return b.sum - a.sum
            })
            return array;

        }

        _rank([
            { name: 'xiao', chinese: 98, math: 100, english: 30 },
            { name: 'hon', chinese: 99, math: 90, english: 50 },
            { name: 'ming', chinese: 70, math: 90, english: 90 }
        ])
    </script>
</body>

</html>