Number to words problem solution. Tests here : https://gist.github.com/tamizhgeek/06f923330b130d701d09

NumberToWords.scala

package assignments


class NumberToWords(number : Int) {
  val digitToWord  = Map(
  0 -> "zero",
  1 -> "one",
  2 -> "two",
  3 -> "three",
  4 -> "four",
  5 -> "five",
  6 -> "six",
  7 -> "seven",
  8 -> "eight",
  9 -> "nine"
  )
  def numForWords() = {
    wordFor(number, List()).mkString("-")
  }

  def wordFor(in: Int, res : List[String]) : List[String] = {
    if(in < 10)
        digitToWord.apply(in) :: res
    else
        wordFor(in / 10, digitToWord.apply(in % 10) :: res)
  }
}

object NumberToWords extends App {
  val number = new NumberToWords(103)
}