Javascript 如何创建数组并在Node.js中传递_Javascript_Node.js_Express

Javascript 如何创建数组并在Node.js中传递

javascript node.js express

Javascript 如何创建数组并在Node.js中传递,javascript,node.js,express,Javascript,Node.js,Express,我想传递获取的数据，如下面的array { category: ['Animals','Vehicles'] difficulty: ['easy','medium'] } 我尝试了以下内容，getCategory.push（quick.getCategory（2）），但我遇到了以下错误意外令牌。我搞不清楚如何传递类似数组的数据如果有人有意见，请告诉我谢谢 const API_KEY="https://opentdb.com/api.php?amount=10

我想传递获取的数据，如下面的

array

 { category: ['Animals','Vehicles']

   difficulty: ['easy','medium']
 }

我尝试了以下内容，

getCategory.push（quick.getCategory（2）），

但我遇到了以下错误

意外令牌。

我搞不清楚如何传递类似数组的数据

如果有人有意见，请告诉我

谢谢

const API_KEY="https://opentdb.com/api.php?amount=10&type=multiple";
const fetch = require('node-fetch');
const Quiz=require("../public/javascripts/quiz");


module.exports={
    getQuiz:function(resp){
      fetch(API_KEY)
      .then(response => response.json())
      .then(json => { const quiz = new Quiz(json); 
            resp.send({
                getCategory:quiz.getCategory(1),
                getCategory.push(quiz.getCategory(2)),
                getDifficulty:quiz.getDifficulty(1),
                getDifficulty.push(quiz.getDifficulty(2))
  
            });
        });
    }
};

我的班在后面

class Quiz {
    constructor(quizData){
        this._quizzes = quizData.results;
        this._correctAnswersNum = 0;
    }
    
    getNumOfQuiz(){
        return this._quizzes.length;
    }
    
    getCategory(index){
        return this._quizzes[index-1].category;
    }
    getDifficulty(index){
        return this._quizzes[index-1].difficulty;
    }
}
module.exports = Quiz;

 results: 
   [ { category: 'Animals',
       type: 'multiple',
       difficulty: 'easy',
       question: 'What do you call a baby bat?',
       correct_answer: 'Pup',
       incorrect_answers: [Array] },
     { category: 'Vehicles',
       type: 'multiple',
       difficulty: 'medium',
       question: 'Which supercar company is from Sweden?',
       correct_answer: 'Koenigsegg',
       incorrect_answers: [Array] },
     { category: 'Entertainment: Board Games',
       type: 'multiple',
       difficulty: 'hard',
       question: 'Which board game was first released on February 6th, 1935?',
       correct_answer: 'Monopoly',
       incorrect_answers: [Array] }]

fetch（API_键）

返回如下内容

class Quiz {
    constructor(quizData){
        this._quizzes = quizData.results;
        this._correctAnswersNum = 0;
    }
    
    getNumOfQuiz(){
        return this._quizzes.length;
    }
    
    getCategory(index){
        return this._quizzes[index-1].category;
    }
    getDifficulty(index){
        return this._quizzes[index-1].difficulty;
    }
}
module.exports = Quiz;

 results: 
   [ { category: 'Animals',
       type: 'multiple',
       difficulty: 'easy',
       question: 'What do you call a baby bat?',
       correct_answer: 'Pup',
       incorrect_answers: [Array] },
     { category: 'Vehicles',
       type: 'multiple',
       difficulty: 'medium',
       question: 'Which supercar company is from Sweden?',
       correct_answer: 'Koenigsegg',
       incorrect_answers: [Array] },
     { category: 'Entertainment: Board Games',
       type: 'multiple',
       difficulty: 'hard',
       question: 'Which board game was first released on February 6th, 1935?',
       correct_answer: 'Monopoly',
       incorrect_answers: [Array] }]

我没有看到在这个实现中我们到底需要如何使用类方法。。但我们可以这样做

这是我们收到的数据

const data = [ { category: 'Animals',
       type: 'multiple',
       difficulty: 'easy',
       question: 'What do you call a baby bat?',
       correct_answer: 'Pup',
       incorrect_answers: [Array] },
     { category: 'Vehicles',
       type: 'multiple',
       difficulty: 'medium',
       question: 'Which supercar company is from Sweden?',
       correct_answer: 'Koenigsegg',
       incorrect_answers: [Array] },
     { category: 'Entertainment: Board Games',
       type: 'multiple',
       difficulty: 'hard',
       question: 'Which board game was first released on February 6th, 1935?',
       correct_answer: 'Monopoly',
       incorrect_answers: [Array] }];

我们要作为响应发送的数据结构

const finalResponse = {
  category : [],
  difficulty : [] 
}

在实际数据上循环，并在

finalResponse

中收集数据。可能是如果您已经知道数据的

索引

，您可以使用问题中提到的if

类

。目前，我们已经使用

数据

数组原型方法

forEach

在每个数据上循环，如下所示

data.forEach(function({category, difficulty}){
    finalResponse.category.push(category);
    finalResponse.category.push(difficulty);
})

最后将收集的数据作为响应发送

res.send(finalResponse);