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来源：2-7 编程练习

Lanny_Chung

2022-04-26 16:13:51

<!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>
        const arr = ["i", "m", "o", "o", "c"]
        //    在此补充代码
        for (const [idx,item] of arr.entries()) {
            if(item==='o'){
                arr.splice(idx,1,'O');
                break;
            }
        }
        console.log(arr)
    </script>
</body>

</html>

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