for循环中不存在变量

Question

该方案增加了表行for each客户端和内部的table row，一个td客户端的每一个值（如姓名，IP，值等）。这些值和客户端设置在一个key/value object或dictionary称为clientel.我已将程序设置如下：let clientel = {  socket101: ['Rick', '192.590.49.1', 'Win10', 'Norway', '15:49.00'],  socket102: ['Anthony', '192.90.897.0', 'Win7', 'Negritine', '19:19:38']};function man_table() {  const table = document.getElementById('table-body');  for (let i, client in clientel) {    let row = table.insertRow(i);    let index = row.insertCell(0);    let name = row.insertCell(1);    let ip = row.insertCell(2);    let os = row.insertCell(3);    let country = row.insertCell(4);    let timee = row.insertCell(5);    index.innerHTML = i;    name.innerHTML = client[0];    ip.innerHTML = client[1];    os.innerHTML = client[2];    country.innerHTML = client[3];    timee.innerHTML = client[4];  }};function roomba() {  for (let client in clientel) {    console.log(client)  }};我有按 em' 时执行功能的按钮，但出于某种原因，它说clientel未定义？

Answer 1

你不能在循环中分配i和。您需要使用来获取属性值。clientfor-inclientel[i]

let clientel = {

  socket101: ['Rick', '192.590.49.1', 'Win10', 'Norway', '15:49.00'],

  socket102: ['Anthony', '192.90.897.0', 'Win7', 'Negritine', '19:19:38']

};

function man_table() {

  const table = document.getElementById('table-body');

  for (let i in clientel) {

    let row = table.insertRow(i);

    let index = row.insertCell(0);

    let name = row.insertCell(1);

    let ip = row.insertCell(2);

    let os = row.insertCell(3);

    let country = row.insertCell(4);

    let timee = row.insertCell(5);

    let client = clientel[i];

    index.innerHTML = i;

    name.innerHTML = client[0];

    ip.innerHTML = client[1];

    os.innerHTML = client[2];

    country.innerHTML = client[3];

    timee.innerHTML = client[4];

  }

};

function roomba() {

  for (let client in clientel) {

    console.log(client)

  }

};

man_table();

<table id="table-body">

</table>