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

map the object and calculate the sum and store it in another.

var data = [{costOfAirtickets: 2500, costOfHotel: 1200},{costOfAirtickets: 1500, costOfHotel: 1000}];
var result = [];
var sum = 0;
var costsum = 0;
data.map(function(item, key){
  var cost = item;
  //nsole.log(cost);
  sum = sum + cost.costOfAirtickets;
  costsum = costsum + cost.costOfHotel;

});

result = [{costOfAirtickets:sum, costOfHotel:costsum}];

console.log(result);