javascript sum array of objects by key

Worried Willet answered on September 10, 2021 Popularity 10/10 Helpfulness 7/10

answer javascript sum array of objects by key

related sum similar keys in array of objects

related sum same items values array of objects javascript

javascript sum array of objects by key

Comment

arr.reduce((total, obj) => obj.credit + total,0)
// 3

Popularity 10/10 Helpfulness 7/10 Language javascript

Source: stackoverflow.com

Tags: javascript key sum

Link to this answer
Share Copy Link

Contributed on Sep 10 2021

Worried Willet

0 Answers Avg Quality 2/10

Closely Related Answers

sum similar keys in array of objects

Comment

const arr = [ { 'name': 'P1', 'value': 150 }, { 'name': 'P1', 'value': 150 }, { 'name': 'P2', 'value': 200 }, { 'name': 'P3', 'value': 450 } ];

const sumByKey = (arr, key, value) => {
  const map = new Map();
  for(const obj of arr) {
    const currSum = map.get(obj[key]) || 0;
    map.set(obj[key], currSum + obj[value]);
  }
  const res = Array.from(map, ([k, v]) => ({[key]: k, [value]: v}));
  return res;
}

console.log(sumByKey(arr, 'name', 'value')); // 'name' = value to group by, 'value' = value to sum
 Run code snippet

Popularity 8/10 Helpfulness 4/10 Language javascript

Source: stackoverflow.com

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Nov 06 2022

Delightful Dove

0 Answers Avg Quality 2/10

sum same items values array of objects javascript

Comment

const fruits = [
  {
    type: "oranges",
    amount: 10,
  },
  {
    type: "apples",
    amount: 0,
  },
  {
    type: "oranges",
    amount: 5,
  },
];

const endresult = Array.from(
  fruits
    .reduce((map, curr) => {
      if (!map.has(curr.type)) map.set(curr.type, { ...curr, count: 1 });
      else {
        map.get(curr.type).amount += curr.amount;
        map.get(curr.type).count++;
      }
      return map;
    }, new Map())
    .values()
);

console.log(endresult);

Popularity 4/10 Helpfulness 1/10 Language javascript

Source: stackoverflow.com

Tags: items javascript sum

Link to this answer
Share Copy Link

Contributed on Jun 20 2024

Grieving Gharial

0 Answers Avg Quality 2/10

javascript sum array of objects by key

Contents

More Related Answers

javascript sum array of objects by key

Closely Related Answers

sum similar keys in array of objects

sum same items values array of objects javascript

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.