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/* | |
CREDIT CARD CHECKER BY ~ FRU GODWILL FRU | |
*/ | |
// 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(arr){ | |
let multiplied = []; | |
let nonMultiplied = []; | |
for (i= arr.length-1; i>0; i= i-2){ | |
nonMultiplied.push(arr[i]) | |
} | |
for (i= arr.length-2; i>=0; i= i-2){ | |
let multiplier = arr[i]*2 | |
if(multiplier>9){ | |
multiplier = multiplier - 9 | |
}else{ | |
multiplier = multiplier | |
} | |
multiplied.push(multiplier) | |
}; | |
let multipliedSum = multiplied.reduce((a,b)=>a+b); | |
let nonMultipliedSum = nonMultiplied.reduce((a,b)=>a+b); | |
let sumMod = (multipliedSum + nonMultipliedSum) % 10 ; | |
/* | |
if (sumMod===0){ | |
console.log(`CC is valid`) | |
}else{ | |
console.log(`Invalid CC`) | |
} | |
*/ | |
return sumMod | |
}; | |
//Find invalid Cards and return array | |
function findInvalidCards(x){ | |
let invalidArr = [] | |
for(let i of x){ | |
if (validateCred(i) != 0){ | |
invalidArr.push(i) | |
} | |
} | |
return invalidArr; | |
} | |
//set batch array called with invalid cards function to var | |
const invalidArr = findInvalidCards(batch); | |
//Find invalid cards companies | |
function idInvalidCardCompanies(x){ | |
let invalidCardCompanies = []; | |
for (i=0; i<x.length; i++){ | |
if( (x[i][0] === 3) && !invalidCardCompanies.includes(`Amex (American Express)`)){ | |
invalidCardCompanies.push(`Amex (American Express)`) | |
}else if( (x[i][0] === 4) && !invalidCardCompanies.includes(`Visa`)){ | |
invalidCardCompanies.push(`Visa`) | |
} else if( (x[i][0] === 5) && !invalidCardCompanies.includes(`Mastercard`)){ | |
invalidCardCompanies.push(`Mastercard`) | |
}else if( (x[i][0] === 6) && !invalidCardCompanies.includes(`Discover`)){ | |
invalidCardCompanies.push(`Discover`) | |
}else if(x[i][0] != 6 && x[i][0] != 5 && x[i][0] != 4 && x[i][0] != 3 ){ | |
console.log(`“Company not found”.`) | |
} | |
} | |
return invalidCardCompanies | |
} | |
console.log(idInvalidCardCompanies(invalidArr)) | |
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