Help with Credit Card Checker - validateCred()

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1

I’m having issues with the first part of the checker. I keep getting false for valid card numbers:

const valid2 = [5, 5, 3, 5, 7, 6, 6, 7, 6, 8, 7, 5, 1, 4, 3, 9];

const validateCred = array => {
  const checkDigit = array.pop();
  const testArr = array.reverse();
  for (let i=0; i<testArr.length; i+=2) {
    let doubleNum = testArr[i]*2;
    if (doubleNum > 9) {
      testArr[i] = doubleNum - 9;
    }
  }
  let arrSum = testArr.reduce((a, b) => a+b, checkDigit);
  return arrSum % 10 === 0 ? true : false; 
};
console.log(validateCred(valid2));

I’ve been racking my brain trying to figure this out… What am I missing?

2

A post was split to a new topic: Please lend a hand trying to figure out this problem