Question

我目前正在使用discord.js模块制作机器人。我在JavaScript或编程方面不是很擅长，我试过在任何地方问这个，但我无法解决它。

我的机器人应该从数组中提取图像，其中12张图像保存在我的计算机上。有时它可以成功运行，但有时它只是用“NaN”回复IN DISCORD（不在控制台中）。

 else if (msg.content.startsWith(prefix + "duckquery")) {
    var ducks = [ {file: "./img/ducks1.jpg"}, {file: "./img/ducks2.jpg"}, {file: "./img/ducks3.jpg"}, +
    {file: "./img/ducks4.jpg"}, {file: "./img/ducks5.jpg"}, {file: "./img/ducks6.jpg"}, {file: "./img/ducks7.jpg"}, +
    {file: "./img/ducks8.jpg"}, {file: "./img/ducks9.jpg"}, {file: "./img/ducks10.jpg"}, {file: "./img/ducks11.jpg"}, +
    {file: "./img/ducks12.jpg"}];

    var duck = ducks[Math.floor(Math.random()*(ducks.length))]
    msg.channel.send(duck);

Answer 1

您不应该使用+，因为那是尝试添加两个对象，为您提供NaN（非数字）

var ducks = [ {file: "./img/ducks1.jpg"}, {file: "./img/ducks2.jpg"}, {file: "./img/ducks3.jpg"}, +
{file: "./img/ducks4.jpg"}, {file: "./img/ducks5.jpg"}, {file: "./img/ducks6.jpg"}, {file: "./img/ducks7.jpg"}, +
{file: "./img/ducks8.jpg"}, {file: "./img/ducks9.jpg"}, {file: "./img/ducks10.jpg"}, {file: "./img/ducks11.jpg"}, +
{file: "./img/ducks12.jpg"}];

打印出鸭子：

[Object, Object, Object, NaN, Object, Object, Object, NaN, Object, Object, Object, NaN]

改为使用：

var ducks = [
    {file: "./img/ducks1.jpg"}, {file: "./img/ducks2.jpg"}, {file: "./img/ducks3.jpg"},
    {file: "./img/ducks4.jpg"}, {file: "./img/ducks5.jpg"}, {file: "./img/ducks6.jpg"},
    {file: "./img/ducks7.jpg"}, {file: "./img/ducks8.jpg"}, {file: "./img/ducks9.jpg"},
    {file: "./img/ducks10.jpg"}, {file: "./img/ducks11.jpg"}, {file: "./img/ducks12.jpg"}
];

它为你提供了对象：

[Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object]

您确定需要一个对象数组而不是一个字符串数组吗？

var ducks = [
 "./img/ducks1.jpg", "./img/ducks2.jpg", "./img/ducks3.jpg",
 "./img/ducks4.jpg", "./img/ducks5.jpg", "./img/ducks6.jpg",
 "./img/ducks7.jpg", "./img/ducks8.jpg", "./img/ducks9.jpg",
 "./img/ducks10.jpg", "./img/ducks11.jpg", "./img/ducks12.jpg"
];

当我要求随机图像时，Bot有时会发布NaN

1 个答案: