js 对象数组深拷贝

参考 https://www.cnblogs.com/xjnotxj/p/9810534.html

const _ = require('lodash');

let one_brand = [
    {name: 'A', count: 1, value: Infinity},
    {name: 'B', count: 2},
]

// 深拷贝
// 方法一
let two_brand = one_brand.map(o => Object.assign({}, o));
// 方法二
let two_brand = one_brand.map(o => ({...o}));
// 方法三（推荐）
let two_brand = _.cloneDeep(one_brand);

console.log("改变前:")
console.log(one_brand) 
console.log(two_brand) 

two_brand[1].count = 0;

console.log("改变后:")
console.log(one_brand) 
console.log(two_brand)