-
Notifications
You must be signed in to change notification settings - Fork 0
/
main.js
101 lines (90 loc) · 3.38 KB
/
main.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
// 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 to validate credit card
function validateCred(cardNumber) {
let sum = 0;
for (let i = cardNumber.length - 1; i >= 0; i--) {
let currentNumber = cardNumber[i];
if((cardNumber.length - i - 1) % 2 === 1) {
currentNumber *= 2;
if(currentNumber > 9) {
currentNumber -= 9;
};
};
sum += currentNumber;
};
if(sum % 10 === 0) {
return true;
} else {
return false;
};
};
console.log(validateCred(valid1));
console.log(validateCred(invalid1));
// function to find invalid credit cards in an array
function findInvalidCards(cards) {
let invalid = [];
for (let card in cards) {
if(!validateCred(cards[card])) {
invalid.push(cards[card]);
};
};
return invalid;
};
console.log(findInvalidCards(batch));
// function to determine which companies own the invalid credit cards
function idInvalidCardCompanies (invalidCards) {
findInvalidCards(invalidCards);
let companyInvalidCards = [];
for (let cards in invalidCards) {
let firstNumber = invalidCards[cards][0];
switch(firstNumber) {
case 3:
if(companyInvalidCards.indexOf('Amex') === -1) {
companyInvalidCards.push('Amex');
};
break;
case 4:
if(companyInvalidCards.indexOf('Visa') === -1) {
companyInvalidCards.push('Visa');
};
break;
case 5:
if(companyInvalidCards.indexOf('MasterCard') === -1) {
companyInvalidCards.push('MasterCard');
};
break;
case 6:
if(companyInvalidCards.indexOf('Discover') === -1) {
companyInvalidCards.push('Discover');
};
break;
default:
if(companyInvalidCards.indexOf('Company not found') === -1) {
companyInvalidCards.push('Company not found');
};
break;
};
};
return companyInvalidCards;
};
console.log(idInvalidCardCompanies(batch));