如何使用lodash合并两个数组并求和重复对象的值 [英] How to merge two arrays and sum values of duplicate objects using lodash
本文介绍了如何使用lodash合并两个数组并求和重复对象的值的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
有两个数组:
[
{"id": "5c5030b9a1ccb11fe8c321f4", "quantity": 1},
{"id": "344430b94t4t34rwefewfdff", "quantity": 5},
{"id": "342343343t4t34rwefewfd53", "quantity": 3}
]
和
[
{"id": "5c5030b9a1ccb11fe8c321f4", "quantity": 2},
{"id": "344430b94t4t34rwefewfdff", "quantity": 1}
]
如何将它们合并为一个求和数量?
How to combine them into one summing quantity?
[
{"id": "5c5030b9a1ccb11fe8c321f4", "quantity": 3},
{"id": "344430b94t4t34rwefewfdff", "quantity": 6},
{"id": "342343343t4t34rwefewfd53", "quantity": 3}
]
其中之一有时可能是空的
One of them can be empty sometimes
推荐答案
您可以使用纯JavaScript来实现.
You can do it with plain JavaScript.
使用 Array.reduce()
通过id制作中间字典并累积数量,然后使用
const arr1 = [
{"id": "5c5030b9a1ccb11fe8c321f4", "quantity": 1},
{"id": "344430b94t4t34rwefewfdff", "quantity": 5},
{"id": "342343343t4t34rwefewfd53", "quantity": 3}
];
const arr2 = [
{"id": "5c5030b9a1ccb11fe8c321f4", "quantity": 2},
{"id": "344430b94t4t34rwefewfdff", "quantity": 1}
];
const result = Object.values([...arr1, ...arr2].reduce((acc, { id, quantity }) => {
acc[id] = { id, quantity: (acc[id] ? acc[id].quantity : 0) + quantity };
return acc;
}, {}));
console.log(result);
这篇关于如何使用lodash合并两个数组并求和重复对象的值的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文