如何使用lodash合并两个数组和重复对象的求和值

const _ = require('lodash');

const array1 = [1, 2, 3];
const array2 = [4, 5, 6];
const mergedArray = _.concat(array1, array2);

console.log(mergedArray);  // [1, 2, 3, 4, 5, 6]

const _ = require('lodash');

const array1 = [1, 2, 3];
const array2 = [3, 4, 5];
const mergedArray = _.union(array1, array2);

console.log(mergedArray);  // [1, 2, 3, 4, 5]

const _ = require('lodash');

const array = [
  { id: 1, value: 10 },
  { id: 2, value: 20 },
  { id: 1, value: 30 },
];

const groupedObject = _.groupBy(array, 'id');

console.log(groupedObject);
/*
{
  1: [
    { id: 1, value: 10 },
    { id: 1, value: 30 },
  ],
  2: [
    { id: 2, value: 20 },
  ],
}
*/

const _ = require('lodash');

const array = [
  { id: 1, value: 10 },
  { id: 2, value: 20 },
  { id: 1, value: 30 },
];

const groupedObject = _.groupBy(array, 'id');

const sumByValue = _.mapValues(groupedObject, objects =>
  _.sumBy(objects, 'value')
);

console.log(sumByValue);  // { 1: 40, 2: 20 }