Contents

import scala.collection.immutable.ListMap

class RomanNumeral(n: Int) {
  private def numeralValues = ListMap(
    1000 -> "M",
    900  -> "CM",
    500  -> "D",
    400  -> "CD",
    100  -> "C",
    90   -> "XC",
    50   -> "L",
    40   -> "XL",
    10   -> "X",
    9    -> "IX",
    5    -> "V",
    4    -> "IV",
    1    -> "I"
  )

  private def fromNumber(n: Int, numerals: String): String = {
    numeralValues.find(_._1 <= n) match {
      case Some((threshold, numeral)) => fromNumber(n - threshold, numerals + numeral)
      case None => numerals
    }
  }

  val value = fromNumber(n, "")
}

object RomanNumeral {
  def apply(n: Int) = new RomanNumeral(n)
}

Version data entries

59 entries across 59 versions & 1 rubygems

Version	Path
trackler-2.0.6.3	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.6.2	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.6.1	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.6.0	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.5.18	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.5.17	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.5.16	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.5.15	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.5.14	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.5.13	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.5.12	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.5.11	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.5.10	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.5.9	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.5.8	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.5.7	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.5.6	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.5.5	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.5.4	tracks/scala/exercises/roman-numerals/example.scala
trackler-2.0.5.3	tracks/scala/exercises/roman-numerals/example.scala