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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]; | |
let addNewCreditCardFromInput = addNewCredNumber("12345678901234") | |
console.log(batch[batch.length-1]) | |
// Add your functions below: | |
const validateCred = credNumber => { | |
let len = credNumber.length; | |
let sumDigits = 0; | |
for(i=len-1;i>=0;i--){ | |
let digit = credNumber[i] | |
if(i%2==1){ | |
sumDigits+=digit | |
}else{ | |
let doubleDigit = digit*2 | |
if(doubleDigit > 9){ | |
sumDigits+=doubleDigit-9 | |
}else{ | |
sumDigits+=doubleDigit | |
} | |
} | |
} | |
return sumDigits%10===0 | |
} | |
const findInvalidCards = credsArray => { | |
return credsArray.filter(credNumber=>validateCred(credNumber)===false) | |
} | |
let invalidCards = findInvalidCards(batch); | |
console.log("Invalid Card Numbers \n") | |
console.log(invalidCards) | |
const idInvalidCardCompanies = invalidCreds => { | |
return invalidCreds.map(invalidCred=>{ | |
switch(invalidCred[0]){ | |
case 3 : | |
return "Amex (American Express)"; | |
break; | |
case 4 : | |
return "Visa"; | |
break; | |
case 5 : | |
return "Mastercard"; | |
break; | |
case 6 : | |
return "Discover"; | |
break; | |
default : | |
return "Company not found"; | |
break; | |
} | |
}) | |
} | |
function addNewCredNumber (newCredNumber){ | |
batch.push(newCredNumber.split("").map(digit=>parseInt(digit))) | |
} | |
console.log(idInvalidCardCompanies(invalidCards)) |
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