3 Caesars Cipher.txt

function rot13(str) {
  
  var strAz ="ABCDEFGHIJKLMNOPQRSTUVWXYZ"
  var regex =/\w/g;
  var regex1 =/\D/g;
  var strAzArr = strAz.match(regex);
  console.log(strAz.length);
  //console.log(strAzArr);
  var strOriBig=str.toUpperCase();
  var strOriArr0=strOriBig.match(regex1);
  var strOriArr=strOriBig.match(regex);
  console.log(strOriBig);
  console.log(strOriArr0);
 
  var strOriArrLet=strOriArr.join('');
  console.log(strOriArrLet);
  //console.log(strOriArrLet.indexOf(strOriBig[9]));
  
  //strOriArr0[2] = strAz[5+6+9];
  //console.log(strOriArr0);
  
    var numArr=[];
    for (let i=0; i<str.length;i++) 
    { 
      if (strOriArrLet.indexOf(strOriBig[i])>=0) 
      {        
      
      for (let j=0; j<26;j++)
      {

      if(strOriBig[i]==strAz[j]){
            numArr.push(j);        }
      
      }
                 
           
      }


    }
   
  console.log(numArr);
    var numArrChanged=[];
  for (let i=0; i<numArr.length; i++) {

    if((numArr[i]+13)>25){

          numArrChanged.push(numArr[i]+13-26);
    }

    else {
            numArrChanged.push(numArr[i]+13);
           
            }
  }
  
  console.log(numArrChanged);

  var numArrChaAph = [];

  for (let i=0; i<numArrChanged.length;i++)
  
  {
      for (let j=0; j<26;j++)
      {
          if (numArrChanged[i]==j){

            numArrChaAph.push(strAzArr[j]);
          }

      }

  }

   console.log(numArrChaAph);

 for (let i=0; i<strOriBig.length;i++) 
    { 
      if (strOriArrLet.indexOf(strOriBig[i])>=0){

            strOriArr0[i] = numArrChaAph[0];
            numArrChaAph.shift();
      }
             
    }


  console.log(numArrChaAph);
  console.log(strOriArr0);
  var result = strOriArr0.join('');
  console.log(result);
  return result;
}

console.log(rot13("SERR YBIR?"));

/*
var a = "asdsadsaffsfas";

var b = "????pooiwe";

var regex = /\D/g;

var a1=a.match(regex);
var b1=b.match(regex);

for (let i=0; i<b.length;i++)

{

a1[i] = b1[i];

}

console.log(a1);

console.log(a1.join(''));
*/