如何在JavaScript CLI问答游戏中从数组对象获取最高分并对比？

原代码中遍历highscore数组的循环仅逐个赋值currenthq，循环结束后currenthq仅保留数组最后一个元素的信息，导致无法正确对比用户得分与所有高分中的最大值。

以下提供三种高效实现方式：

方法1：使用Array.reduce()提取最高分 #

利用reduce遍历数组并计算最大值，是处理这类场景的常用方案：

// 替换原有的highscore循环部分
const highestScore = highscore.reduce((max, entry) => {
  return entry.score > max ? entry.score : max;
}, 0); // 初始值设为0，兼容空数组场景

// 对比用户得分
if (score > highestScore) {
  console.log("Woohoo! You've beaten the high score. Send me a screenshot and I'll update it. ");
} else {
  console.log("Thank You for playing! ");
}

方法2：基础循环跟踪最高分 #

如果偏好基础循环写法，可在遍历过程中维护当前最高分：

let highestScore = 0;
for (let i = 0; i < highscore.length; i++) {
  if (highscore[i].score > highestScore) {
    highestScore = highscore[i].score;
  }
}

// 对比得分
if (score > highestScore) {
  console.log("Woohoo! You've beaten the high score. Send me a screenshot and I'll update it. ");
} else {
  console.log("Thank You for playing! ");
}

方法3：结合Math.max()与Array.map() #

通过map提取所有分数，再用Math.max取最大值：

const scores = highscore.map(entry => entry.score);
const highestScore = Math.max(...scores); // 展开运算符传递所有分数

// 对比得分
if (score > highestScore) {
  console.log("Woohoo! You've beaten the high score. Send me a screenshot and I'll update it. ");
} else {
  console.log("Thank You for playing! ");
}

var readlineSync = require('readline-sync');
var userName = readlineSync.question("Hey there! Can you tell us your Name? " )
console.log("Welcome! " + userName + " let's play a game 'Do you know Manan?'")
var score = 0;

var highscore = [{
  name: "Jay",
  score: 5,
}, {
  name: "Sanan",
  score: 2,
} ]

function qna(question, answer){
  var userAnswer = readlineSync.question(question);

  if (userAnswer.toUpperCase() === answer.toUpperCase()){
    console.log("You're Right!");
    score = score + 1;
  } else {
    console.log("You're Wrong!");
  }

  console.log("Your score: " + score);
}

const questionOne = {
  question: "Who is my favorite superhero? ",
  answer: "thor",
}

const questionTwo = {
  question: "Which is my favorite Movie? ",
  answer: "la la land",
}

const questionThree = {
  question: "Which is my favorite food? ",
  answer: "pasta",
}

var quiz = [questionOne, questionTwo, questionThree]

for (let i=0; i < quiz.length; i++){
  var currentq = quiz[i];
  qna(currentq.question, currentq.answer);
}

// 获取最高分
const highestScore = highscore.reduce((max, entry) => entry.score > max ? entry.score : max, 0);

if (score > highestScore){
  console.log("Woohoo! You've beaten the high score. Send me a screenshot and I'll update it. ");
} else {
  console.log("Thank You for playing! ");
}

内容的提问来源于stack exchange，提问作者Manan Khurrana