stricmp_bitwise.js

//Microsoft Interview Question

function stricmp(a, b){
  var i = 0;
  var aAscii, bAscii;
  
  while(!isNaN(a.charCodeAt(i)) && !isNaN(b.charCodeAt(i))){
    aAscii = a.charCodeAt(i);
    bAscii = b.charCodeAt(i);
    i++;
    if(aAscii == bAscii || (aAscii ^ 32) == bAscii){
      continue;
    }else{
      break;
    }
  }
  
  i--; //rewind to the last index before loop broke;
  aAscii = a.charCodeAt(i);
  bAscii = b.charCodeAt(i);
  
  if(aAscii == bAscii)
    return 0;
  
  if((aAscii | 32) < (bAscii | 32))
    return -1;
  return 1;
}