How to find sum of numbers in string stored in array

Question

I have figured out how to calculate the value of numbers from a single string, using as an example..

var sum = \"13-2-10-7-3\".split(\'-\').reduce(function(x, y)         


        

Answer 1

You might get the card with maximum sum like this;

var cards = ['4916-2600-1804-0530', '4779-252888-3972', '4252-278893-7978', '4556-4242-9283-2260'],
 cardSums = cards.map(c => c.split("-").reduce((p,c) => +p + +c)),
  maxCard = cards[cardSums.indexOf(Math.max(...cardSums))];
console.log(maxCard);