从大型JSON数据中提取一些数据

{
  "users": [
    {
      "id": 1,
      "name": "Alice",
      "age": 30,
      "email": "alice@example.com"
    },
    {
      "id": 2,
      "name": "Bob",
      "age": 25,
      "email": "bob@example.com"
    }
  ],
  "products": [
    {
      "id": 101,
      "name": "Laptop",
      "price": 999.99
    },
    {
      "id": 102,
      "name": "Smartphone",
      "price": 499.99
    }
  ]
}

const jsonData = `{
  "users": [
    {
      "id": 1,
      "name": "Alice",
      "age": 30,
      "email": "alice@example.com"
    },
    {
      "id": 2,
      "name": "Bob",
      "age": 25,
      "email": "bob@example.com"
    }
  ],
  "products": [
    {
      "id": 101,
      "name": "Laptop",
      "price": 999.99
    },
    {
      "id": 102,
      "name": "Smartphone",
      "price": 499.99
    }
  ]
}`;

const data = JSON.parse(jsonData);

// 提取所有用户的名字
const userNames = data.users.map(user => user.name);
console.log(userNames); // 输出: ["Alice", "Bob"]

// 提取特定用户的信息
const specificUser = data.users.find(user => user.id === 1);
console.log(specificUser); // 输出: { "id": 1, "name": "Alice", "age": 30, "email": "alice@example.com" }