Highest sum from array of credit cards - Node.js Array

Node.js examples for Array:Array Value

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Description

Highest sum from array of credit cards

Demo Code

var cardNumbers = ['1234-2345-5432-2345', '5432-2345-2345-2345', '5432-2345-5432-2435', '5432-2345-5432-2341'];

var findLargest = function(cardArray) {
  var revisedNumbers = [];
  var ccSums = [];

  var indexCounter = 0;
  var highNum = 0;

  cardNumbers.forEach(function(card) {
    var noDash = card.replace(/-/g, "");
    revisedNumbers.push(noDash);//from w ww.  j  a v a  2  s.c o  m
  });

  revisedNumbers.forEach(function(base) {
    var integerArray = base.split('').map(Number);
    var eachSum = integerArray.reduce(function(a,b) {
      return a + b;
    }, 0);

    ccSums.push(eachSum);
  });

  //loop through the sums array
  //use highNum as a constant to check for greater value
  //if greater value, reset the highNum t equal that value
  //and set indexCounter to equal that index number (for tracking)
  for (var i=0; i<ccSums.length; i++){
    if(ccSums[i] > highNum){
      highNum = ccSums[i];
      indexCounter = i;
    }
  }

//now check for the last index of that highest number
  var last = ccSums.lastIndexOf(highNum);
  return cardArray[last];
}

console.log(findLargest(cardNumbers));

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