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@eduairet
Last active March 31, 2021 21:11
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Credit Card Checker Challenge Project (JavaScript)
// Codecademy Credit Card Number exercise by Eduardo Aire Torres
// 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];
// Add your functions below:
function validateCred(array) {
const revArr = array.reverse();
let validationArray = [];
let counter = 0;
for (const digit of revArr) {
if (digit < 10 && digit >= 0) {
if (counter % 2 !== 0) {
if (digit * 2 >= 10) {
validationArray.push(digit * 2 - 9);
} else {
validationArray.push(digit * 2);
}
} else {
validationArray.push(digit);
}
} else {
console.log('Every digit must be above, equal to 0 or bellow 10');
}
counter += 1
}
//console.log(validationArray);
const reducer = (accumulator, currentValue) => accumulator + currentValue;
validationArray = validationArray.reduce(reducer);
let company;
if (array[0] === 3) {
company = 'Amex';
} else if (array[0] === 4) {
company = 'Visa';
} else if (array[0] === 5) {
company = 'Mastercard';
} else if (array[0] === 6) {
company = 'Discover';
} else {
company = 'Not Found';
}
if (validationArray % 10 === 0) {
console.log(`Valid ${company}`);
} else {
console.log('Invalid');
}
}
for (const card of batch) {
validateCred(card);
}
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