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来源：3-5 编程练习

慕数据4158169

2021-03-25 18:11:09

相关代码：

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8"/>
    <title>find()和findIndex()方法</title>
</head>
<body>
<script >
    let data = [
        {
            age: 12,
            name: "张三"
        },
        {
            age: 20,
            name: "李四"
        }
    ]
    /*补充代码*/
    console.log(data.find((value,index,arr)=>{
        return value.age === 12
    }));

    data[data.findIndex((va)=>{
        return va.name === '李四' 
    })].hobby='游泳'

    console.log(...data);
</script>
</body>
</html>