How to iterate over objects in array and sum a property in JavaScript

Question

How to iterate over objects in array and sum a property in JavaScript

JavascriptWeb DevelopmentFront End TechnologyObject Oriented Programming

---

---

Suppose we have an array of objects like this −

const arr = [
   {
      duration: 10,
      any: 'fields'
   }, {
      duration: 20,
      any: 'other fields'
   }, {
      duration: 15,
      any: 'some other fields'
   }
];

We are required to write a JavaScript function that takes in one such array and returns the summed result of the duration properties of all the objects.

For the above array, the output should be 45.

Example

The code for this will be −

const arr = [
   {
      duration: 10,
      any: 'fields'
   }, {
      duration: 20,
      any: 'other fields'
   }, {
      duration: 15,
      any: 'some other fields'
   }
];
const addDuration = arr => {
   let res = 0;
   for(let i = 0; i < arr.length; i++){
      res += arr[i].duration;
   };
   return res;
};
console.log(addDuration(arr));

Output

The output in the console −

45

AmitDiwan

Published on 10-Oct-2020 11:36:14

Previous Page Print Page

Next Page  

Advertisements