使用键列表创建对象

// 定义一个包含键值对的数组
const keyValuePairs = [
  ['name', 'Alice'],
  ['age', 30],
  ['city', 'Wonderland']
];

// 使用reduce方法将键值对数组转换为对象
const obj = keyValuePairs.reduce((acc, [key, value]) => {
  acc[key] = value;
  return acc;
}, {});

console.log(obj); // 输出: { name: 'Alice', age: 30, city: 'Wonderland' }

const keyValuePairs = [
  ['name', 'Alice'],
  ['age', 30],
  ['name', 'Bob'] // 重复键
];

const obj = keyValuePairs.reduce((acc, [key, value]) => {
  if (!acc.hasOwnProperty(key)) {
    acc[key] = value;
  }
  return acc;
}, {});

console.log(obj); // 输出: { name: 'Alice', age: 30 }

const keyValuePairs = [
  ['name', 'Alice'],
  ['age', '30'], // 字符串类型的年龄
  ['city', 'Wonderland']
];

const obj = keyValuePairs.reduce((acc, [key, value]) => {
  if (key === 'age') {
    value = parseInt(value, 10); // 将字符串转换为整数
  }
  acc[key] = value;
  return acc;
}, {});

console.log(obj); // 输出: { name: 'Alice', age: 30, city: 'Wonderland' }