将对象数组中的所有数据汇总到新的对象数组中 [英] Sum all data in array of objects into new array of objects

问题描述

我有一个看起来像这样的对象数组:

I have an array of objects that looks like this:

var data = [
    { costOfAirtickets: 2500, costOfHotel: 1200 },
    { costOfAirtickets: 1500, costOfHotel: 1000 },
]

并且我想对数组中的每个元素求和以生成这样的数组:

and I want to sum each element in the array to produce an array like this:

var result = [ { costOfAirtickets: 4000, costOfHotel: 2200 } ]

我使用了 map 和 reduce 函数，但我只能像这样对单个元素求和:

I have used a map and reduce function but I was able to only sum an individual element like so:

data.map(item => item.costOfAirtickets).reduce((prev, next) => prev + next); // 22

目前这会产生一个单一的值，根据最初的解释，这不是我想要的.

At the moment this produces a single value which is not what I want as per initial explanation.

有没有办法在 Javascript 或 lodash 中做到这一点.

Is there a way to do this in Javascript or probably with lodash.

推荐答案

使用for..in迭代对象和reduce迭代数组

Using for..in to iterate object and reduce to iterate array

var data = [{costOfAirtickets: 2500, costOfHotel: 1200},{costOfAirtickets: 1500, costOfHotel: 1000}];

var result = [data.reduce((acc, n) => {
  for (var prop in n) {
    if (acc.hasOwnProperty(prop)) acc[prop] += n[prop];
    else acc[prop] = n[prop];
  }
  return acc;
}, {})]
console.log(result)

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