calcPosition.js

/* takes single number and convert it to a position
  @arg: 
    Int: number
   @returns: 
    String: position (ie: 1st , 2nd , 3rd , 4th ,... 101st , 1004th ...) 
*/
var calcPosition = (rank) => {
  let final
  let length = rank.toString().length
  --length
  if (length >= 1) {
    let z = "0"
    for (i = 1; i < length; i++)
      z += "0"
    let d = "1" + z
    console.log("d " , d )
    final = rank % parseInt(d)
  } else {
    final = rank
  }

  switch (final) {
    case 1:
      rank = rank + "st"; break
    case 2:
      rank = rank + "nd"; break
    case 3:
      rank = rank + "rd"; break
    default:
      rank = rank + "th"; 
  }

  return rank
}