javascript - 使用 for 循环填充数组并显示它

Question

我不知道如何填充数组并在定位路线后立即显示它，我从nodeJs开始。

目前我能够控制台记录对象列表，我想填充一个数组并在执行 localhost:3000/时显示它

sortGroup=(group)=> {
    for (const entry of group.entries) {
        console.log(`Entry: ${field(entry, 'Name')}: UserName: ${field(entry, 'Surname')} || Age:  ${field(entry, 'Age')} || Age: ${field(entry,'Address')}`)             
    }
    for (const subGroup of group.groups) {
        sortGroup(subGroup)
    }
}

app.get('/',async (req, res) => {
    res.send(`<h1> I want to display the table</h1>`)
})

Answer 1

您可以使用push方法向数组添加新元素

sortGroup = (group, result = [])=> {
    for (const entry of group.entries) {
        // Notice that I'm using push method
        result.push(`Entry: ${field(entry, 'Name')}: UserName: ${field(entry, 'Surname')} || Password:  ${field(entry, 'Age')} || URL: ${field(entry,'Address')}`)          
    }
    for (const subGroup of group.groups) {
        sortGroup(subGroup, result)
    }
    return result
}

app.get('/',async (req, res) => {
    // call sortGroup method
    const group = []; // You need to populate group somehow here
    const result = [];
    // As you are calling the below function recursively, its good to pass the array
    sortGroup(group, result)
    return res.json(
      // you can add any object here
      result
    );
})