// All valid credit card numbers
const valid1 = [4, 5, 3, 9, 6, 7, 7, 9, 0, 8, 0, 1, 6, 8, 0, 8];
const valid2 = [5, 5, 3, 5, 7, 6, 6, 7, 6, 8, 7, 5, 1, 4, 3, 9];
const valid3 = [3, 7, 1, 6, 1, 2, 0, 1, 9, 9, 8, 5, 2, 3, 6];
const valid4 = [6, 0, 1, 1, 1, 4, 4, 3, 4, 0, 6, 8, 2, 9, 0, 5];
const valid5 = [4, 5, 3, 9, 4, 0, 4, 9, 6, 7, 8, 6, 9, 6, 6, 6];
// All invalid credit card numbers
const invalid1 = [4, 5, 3, 2, 7, 7, 8, 7, 7, 1, 0, 9, 1, 7, 9, 5];
const invalid2 = [5, 7, 9, 5, 5, 9, 3, 3, 9, 2, 1, 3, 4, 6, 4, 3];
const invalid3 = [3, 7, 5, 7, 9, 6, 0, 8, 4, 4, 5, 9, 9, 1, 4];
const invalid4 = [6, 0, 1, 1, 1, 2, 7, 9, 6, 1, 7, 7, 7, 9, 3, 5];
const invalid5 = [5, 3, 8, 2, 0, 1, 9, 7, 7, 2, 8, 8, 3, 8, 5, 4];
// Can be either valid or invalid
const mystery1 = [3, 4, 4, 8, 0, 1, 9, 6, 8, 3, 0, 5, 4, 1, 4];
const mystery2 = [5, 4, 6, 6, 1, 0, 0, 8, 6, 1, 6, 2, 0, 2, 3, 9];
const mystery3 = [6, 0, 1, 1, 3, 7, 7, 0, 2, 0, 9, 6, 2, 6, 5, 6, 2, 0, 3];
const mystery4 = [4, 9, 2, 9, 8, 7, 7, 1, 6, 9, 2, 1, 7, 0, 9, 3];
const mystery5 = [4, 9, 1, 3, 5, 4, 0, 4, 6, 3, 0, 7, 2, 5, 2, 3];
// An array of all the arrays above
const batch = [valid1, valid2, valid3, valid4, valid5, invalid1, invalid2, invalid3, invalid4, invalid5, mystery1, mystery2, mystery3, mystery4, mystery5];
const batch2 = [invalid1, invalid2, invalid3, invalid4, invalid5];
// Add your functions below:
//t num = [1, 2, 3, 4, 5, 6];
const validateCred = (card) => {
let newCard = card.reverse();
//return newCard;
for (let i = 0; i < newCard.length; i++){
if (i % 2 != 0) {
newCard[i] *= 2;
if(newCard[i] > 9) {
newCard[i] -= 9;
}
}
}
let total = newCard.reduce((a,b) => a + b, 0)
if (total % 10 == 0) {
return true;
} else {
return false;
}
}
const findInvalidCards = (cards) =>{
let invalidCard = [];
for (let j = 0; j < cards.length; j++) {
if(validateCred(cards[j]) === false) {
invalidCard.push(cards[j])
}
}
return invalidCard;
}
My findInvalidCards function is working. This is what I tried to come up with for the idInvalidCardCompanies function. I’m having errors.
const idInvalidCardCompanies = (cards) => {
let invalidCardCompanies = [];
for (let k = 0; k < cards.length; k++){
if(validateCred(cards[k]) === false) {
switch(cards[k]) {
case 3:
return 'Amex (American Express)';
break;
case 4:
return 'Visa';
break;
case 5:
return 'MasterCard';
break;
case 6:
return 'Discover';
break;
default:
return 'Company not found';
break;
}
invalidCardCompanies.push(cards[k]);
}
}
return invalidCardCompanies;
}
console.log(idInvalidCardCompanies(batch));