Sum all data in array of objects into new array of objects

Question

I have an array of objects that looks like this:

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


        

Answer 1

You can use a simple forEach() loop for that:

var data = [{costOfAirtickets: 2500, costOfHotel: 1200},{costOfAirtickets: 1500, costOfHotel: 1000}];
var res = [];
var tempObj = {};
data.forEach(({costOfAirtickets, costOfHotel}) => {
  tempObj['costOfAirtickets'] = (tempObj['costOfAirtickets'] || 0) + costOfAirtickets;
  tempObj['costOfHotel'] = (tempObj['costOfHotel'] || 0) + costOfHotel;
 });
res.push(tempObj);
console.log(res);