面试题：JavaScript数组reduce方法的复杂应用

Question

假设有一个数组，数组元素为对象，对象包含name（字符串）和score（数字）两个属性。请使用reduce方法计算出所有对象score属性的总和，并且找出score最高的对象的name。示例数组：[{name: 'A', score: 80}, {name: 'B', score: 90}, {name: 'C', score: 75}]。

Answer 1

const arr = [{name: 'A', score: 80}, {name: 'B', score: 90}, {name: 'C', score: 75}];
const result = arr.reduce((acc, cur) => {
    acc.totalScore += cur.score;
    if (cur.score > acc.maxScore) {
        acc.maxScore = cur.score;
        acc.maxName = cur.name;
    }
    return acc;
}, {totalScore: 0, maxScore: 0, maxName: ''});
console.log(`所有对象score属性的总和: ${result.totalScore}`);
console.log(`score最高的对象的name: ${result.maxName}`);

输出结果： 所有对象score属性的总和: 245 score最高的对象的name: B