Hello i will include my code below! Let me know how I can make it even better!
// 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:
const validateCred = arr => {
let newArr = ;
let count = 0;
let sum = 0;
for ( let i = arr.length - 2; i >= 0; i–){
count++;
if ((count%2) !== 0) {
if ((arr[i] * 2) > 9 ){
newArr.push((arr[i] * 2) - 9);
} else if ((arr[i] * 2) < 9){
newArr.push(arr[i] * 2);
}
} else if ((count%2) === 0) {
newArr.push(arr[i]);
}
}
sum = newArr.reduce((acc, curVal) => acc + curVal, arr[arr.length-1]);
if ( (sum % 2) === 0) {
return true;
} else {
return false;
}
};
const finalInvalidCards = arr1 => {
let arr2 = ;
arr1.forEach(element => {
if (validateCred(element) !== true){
arr2.push(element);
}
});
return arr2;
}
const idInvalidCardCompanies = nestedArr => {
let compArr = ;
for (const el of nestedArr) {
if(el[0] === 3){
compArr.push('Amex (American Express)');
}
if(el[0] === 4) {
compArr.push('Visa');
}
if(el[0] === 5) {
compArr.push('MasterCard');
}
if(el[0] === 6) {
compArr.push('Discover');
}
}
let uniqueArr = […new Set(compArr)];
return uniqueArr;
}
// Checking if my code works
console.log(validateCred(invalid1));
let arr4 = finalInvalidCards(batch);
console.log(arr4);
let com = idInvalidCardCompanies(arr4);
console.log(com);