使用.filter和.reduce过滤JavaScript中的嵌套对象

const data = [
  {
    id: 1,
    name: 'John',
    age: 25,
    address: {
      city: 'New York',
      country: 'USA'
    }
  },
  {
    id: 2,
    name: 'Jane',
    age: 30,
    address: {
      city: 'London',
      country: 'UK'
    }
  },
  {
    id: 3,
    name: 'Bob',
    age: 35,
    address: {
      city: 'Paris',
      country: 'France'
    }
  }
];

// 使用.filter()方法筛选年龄大于30的对象
const filteredData = data.filter(obj => obj.age > 30);
console.log(filteredData);

// 使用.reduce()方法计算所有对象的年龄总和
const totalAge = data.reduce((acc, obj) => acc + obj.age, 0);
console.log(totalAge);