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:
const validateCred=array=>{
  let sum=array[array.length-1];
  let revArray=array.slice().reverse();
  for(i=1;i<revArray.length;i++){
    if(i%2!==0){
      if(revArray[i]*2>9){
        sum=sum+revArray[i]*2-9;
      }
      else{
        sum=sum+revArray[i]*2;
      }
    }
    else{
      sum=sum+revArray[i];
    }
  }
  if(sum%10===0){
    return true;
  }
  else{
    return false;
  }
}
const findInvalidCards=array=>{
  const invalidCards=[];
  for(a of array){
    if(!validateCred(a)){
      invalidCards.push(a);
    }
  }
  return invalidCards;
}
const idInvalidCardCompanies=array=>{
  const comArray=[];
  for(a of array){
    switch(a[0]){
      case 3:{
        if(comArray.indexOf('Amex (American Express)')===-1)
          comArray.push('Amex (American Express)');
      }break;
      case 4:{
        if(comArray.indexOf('Visa')===-1)
        comArray.push('Visa');
      }break;
      case 5:{
        if(comArray.indexOf('Mastercard')===-1)
        comArray.push('Mastercard');
      }break;
      case 6:{
        if(comArray.indexOf('Discover')===-1)
        comArray.push('Discover');
      }break;
      default:{
        console.log('Company not found');
      }
    }
  }
  return comArray;
}
const toNum=string=>{
  const creditNum=[];
  for(i=0;i<string.length;i++){
    creditNum.push(parseInt(string[i]));
  }
  return creditNum;
}
const toValid=array=>{
  console.log(array);
  let sum=array[array.length-1];
  let revArray=array.slice().reverse();
  for(i=1;i<revArray.length;i++){
    if(i%2!==0){
      if(revArray[i]*2>9){
        sum=sum+revArray[i]*2-9;
      }
      else{
        sum=sum+revArray[i]*2;
      }
    }
    else{
      sum=sum+revArray[i];
    }
  }
  if(sum%10===0){
    console.log('Its a valid credit card');
  }
  else{
    while(sum%10!==0){
      console.log(sum);
      for(i=array.length-1;i>=0;i--){
      if((array.length-1-i)%2===0){
        if(array[i]< 9){
          array[i]++;
          sum++;
          if(sum%10===0){
            break;
          }
        }
      }
    }
    }
    console.log(array);
    console.log(validateCred(array));
  }
}
toValid(invalid3);