在我正在制作的Discord Bot中,它需要从JSON文件中选择一个随机对象。我目前的代码是:
function spawn(){
if (randomNum === 24) return
const name = names.randomNum
const embed = new Discord.RichEmbed()
.setTitle(`${name} has been found!`)
.setColor(0x00AE86)
.setThumbnail(`attachment://./sprites/${randomNum}.png`)
.setTimestamp()
.addField("Quick! Capture it with `>capture`!")
msg.channel.send({embed});
}

JSON文件如下所示:
{
"311": "Blargon",
"310": "Xryzoz",
"303": "Noot",
"279": "",
"312": "Arragn",
"35": "Qeud",
...
}

我希望它随机选择其中一个,例如303
,并将其发布在丰富的嵌入中。我该怎么办?
答案 0 :(得分:2)
const jsonData = {
"311": "Blargon",
"310": "Xryzoz",
"303": "Noot",
"279": "",
"312": "Arragn",
"35": "Qeud",
}
const values = Object.values(jsonData)
const randomValue = values[parseInt(Math.random() * values.length)]
console.log(randomValue)
答案 1 :(得分:2)
您可以选择这样的随机名称:
// Create array of object keys, ["311", "310", ...]
const keys = Object.keys(names)
// Generate random index based on number of keys
const randIndex = Math.floor(Math.random() * keys.length)
// Select a key from the array of keys using the random index
const randKey = keys[randIndex]
// Use the key to get the corresponding name from the "names" object
const name = names[randKey]
// ...
答案 2 :(得分:0)
这可以分两步完成
使用Javascript和本地服务器加载Json文件
1>创建一个Json文件,将其命名为 botNames.json ,添加您的数据。
注意:.json文件只能包含Json Object,Array或Json literal
{
"311": "Blargon",
"310": "Xryzoz",
"303": "Noot",
"279": "",
"312": "Arragn",
"35": "Qeud"
}
使用XMLHttpRequest()加载数据,您可以使用以下函数加载.json文件,传递回调函数并将路径作为参数。
function loadJSON(callback,url) {
var xobj = new XMLHttpRequest();
xobj.overrideMimeType("application/json");
xobj.open('GET', url, true);
xobj.onreadystatechange = function () {
if (xobj.readyState == 4 && xobj.status == "200") {
callback(xobj.responseText);
}
};
xobj.send(null);
}
要生成随机索引,您可以使用以下表达式
Math.floor(lowerLimt +(upperLimit - lowerLimit + 1)* Math.Random())
这将为您提供 [lowerLimit,upperLimit]
范围内的值注意:这是可能的,因为 Math.random()会生成 [0,1)
您的回拨功能将
function callback1(response){
var botNames = JSON.parse(response)
var keys = Object.keys(botNames);
var randomProperty = keys[Math.floor(keys.length*Math.random())]
var botName = botNames[randomProperty]
console.log(botName);
}
您可以在代码中使用上述概念
function loadJSON(callback,url) {
var xobj = new XMLHttpRequest();
xobj.overrideMimeType("application/json");
xobj.open('GET', url, true);
xobj.onreadystatechange = function () {
if (xobj.readyState == 4 && xobj.status == "200") {
// sending the resonse to your callback
callback(xobj.responseText);
}
};
xobj.send(null);
}
function spawn(){
loadJSON(function(response){
//This is your callback function
var names = JSON.parse(response)
var keys = Object.keys(botNames);
var randomNum = keys[Math.floor(keys.length*Math.random())]
if (randomNum === 24) return
const name = names[randomNum]
const embed = new Discord.RichEmbed()
.setTitle(`${name} has been found!`)
.setColor(0x00AE86)
.setThumbnail(`attachment://./sprites/${randomNum}.png`)
.setTimestamp()
.addField("Quick! Capture it with `>capture`!")
msg.channel.send({embed});
},'/PATH_TO_YOUR_JSON/botNames.json')
}