Codecademy export

main.js

// 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(cardNumberArray){ 
  let InvertNumbers= cardNumberArray.reverse();
  const initSum=0; 
  const sum =InvertNumbers.reduce((sum,digit,index)=>{
     if (index % 2 !==0){
          digit*=2; 
      if (digit > 9){
          digit-=9;
       }
     }
    return  sum + digit 
  },initSum);
  return sum % 10 ===0;
}
//console.log(validateCred(invalid1));

const findInvalidCards=(CardsNumbers)=>{
  return CardsNumbers.filter((numbers)=>validateCred(numbers)===false?numbers:null);
}

const idInvalidCardCompanies=(invalisCards)=>{
  const companyCC={ 
       3:"Amex (American Express)",
       4:"Visa",
       5:"Mastercard",
       6:"Discover"
     };
  let getIdCards=invalisCards.map((item)=>{
       let fistDigit=item[0];
      if(fistDigit>=3 && fistDigit<=6){
        return fistDigit;
      }else{
        console.log("Company not found") ;
      }
      });
 getIdCards=[...new Set(getIdCards)];

return  getIdCards.map((comp)=>companyCC[comp]);
}

var NoCompanie=[6, 9, 1, 3, 5, 4, 0, 4, 6, 3, 0, 7, 2, 5, 2, 3];
var val=idInvalidCardCompanies([NoCompanie]);

console.log(val);