从对象中提取嵌套属性

const obj = {
  name: 'John',
  age: 30,
  address: {
    street: '123 Main St',
    city: 'New York',
    country: 'USA'
  }
};

// 从对象中提取嵌套属性
const street = obj.address.street;
const city = obj.address.city;
const country = obj.address.country;

console.log(street); // 输出：123 Main St
console.log(city); // 输出：New York
console.log(country); // 输出：USA

const _ = require('lodash');

const obj = {
  name: 'John',
  age: 30,
  address: {
    street: '123 Main St',
    city: 'New York',
    country: 'USA'
  }
};

// 从对象中提取嵌套属性
const street = _.get(obj, 'address.street');
const city = _.get(obj, 'address.city');
const country = _.get(obj, 'address.country');

console.log(street); // 输出：123 Main St
console.log(city); // 输出：New York
console.log(country); // 输出：USA