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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: | |
function validateCred(myArr) { | |
let sum = 0 | |
let revArr = myArr.reverse() | |
for (let i = 0; i < revArr.length; i++){ | |
if (i % 2 === 0) { | |
sum += revArr[i] | |
} | |
else if (i % 2 != 0) { | |
if (revArr[i] * 2 > 9) { | |
sum += revArr[i] * 2 - 9 | |
} | |
else if (revArr[i] * 2 <= 9) { | |
sum += revArr[i] * 2 | |
} | |
} | |
} | |
if (sum % 10 === 0) { | |
return true | |
} | |
else {return false} | |
} | |
//console.log(validateCred(invalid5)) | |
//console.log(validateCred(valid3)) | |
function findInvalidCards(nestArray) { | |
var invArray = []; | |
for (let i = 0; i < nestArray.length; i++) { | |
if (validateCred(nestArray[i]) === false) { | |
invArray.push(nestArray[i]) | |
} | |
} return invArray | |
} | |
/*console.log(findInvalidCards([invalid1, invalid2, invalid3, invalid4, invalid5])) | |
console.log(findInvalidCards([valid1, valid2, valid3, valid4, valid5]))*/ | |
function idInvalidCardCompanies(arrayN) { | |
var companies = [] | |
for (let i = 0; i < arrayN.length; i++) { | |
if (arrayN[i][0] === 3 && companies.indexOf('Amex') === -1) { | |
companies.push('Amex') } | |
else if (arrayN[i][0] === 4 && companies.indexOf('Visa') === -1) { | |
companies.push('Visa') } | |
else if (arrayN[i][0] === 5 && companies.indexOf('Mastercard') === -1) { | |
companies.push('Mastercard') } | |
else if (arrayN[i][0] === 6 && companies.indexOf('Discover') === -1) { | |
companies.push('Discover')} | |
else if ((arrayN[i][0] < 3 || arrayN[i][0]) > 6 && companies.indexOf('Company not found.') < 0) { | |
companies.push('Company not found.') } | |
} | |
return companies | |
} | |
//console.log(idInvalidCardCompanies([invalid1])); // Should print['visa'] | |
//console.log(idInvalidCardCompanies([invalid2])); // Should print ['mastercard'] | |
//console.log(idInvalidCardCompanies(batch)) | |
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