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Created Sep 8, 2022
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// 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 multiplyByTwo = [];
for (let i = arr.length-2; i >= 0; i -= 2) {
multiplyByTwo.push(arr[i] * 2)
}
let greaterThanNine = multiplyByTwo.filter(ele=>ele>9).map(ele=>ele-9)
let lessThanNine = multiplyByTwo.filter(ele=>ele<9)
let concating = greaterThanNine.concat(lessThanNine)
let multiplyByOne = [];
for (let i = arr.length-1; i >= 0; i -= 2) {
multiplyByOne.push(arr[i])
}
const allInOne = concating.concat(multiplyByOne)
let sum = allInOne.reduce((a,b)=>a+b)
if (sum % 10 == 0) {
return true;
} else {
return false;
}
}
const findInvalidCards = arr => {
let notValid = arr.filter(ele => validateCred(ele) === false)
return notValid
}
//console.log(findInvalidCards(batch))
const idInvalidCardCompanies = arr => {
for (let ele of arr) {
if(ele[0] < 3 || ele[0] > 6) {
return 'Company not found';
}
}
let three = arr.filter(ele => ele[0] === 3).map(ele => ele[0] = 'Amex')
three.length > 1 ? three.pop() : three
let four = arr.filter(ele => ele[0] === 4).map(ele => ele[0] = 'Visa')
four.length > 1 ? four.pop() : four
let five = arr.filter(ele => ele[0] === 5).map(ele => ele[0] = 'Mastercard')
five.length > 1 ? five.pop() : five
let six = arr.filter(ele => ele[0] === 6).map(ele => ele[0] = 'Discover')
six.length > 1 ? six.pop() : six
total = three.concat(four,five,six)
return total;
}
console.log(idInvalidCardCompanies(findInvalidCards(batch)))
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