Functional FizzBuzz

FizzBuzz

class FizzBuzz {

  private val fizzes = cycle("", "", "Fizz")
  private val buzzes = cycle("", "", "", "", "Buzz")
  private val fizzBuzzes = fizzes.zip(buzzes).map(x => x._1 ++ x._2)
  private lazy val fizzBuzz = fizzBuzzes.zip(Stream.from(1)).map(x => if (x._1.isEmpty) x._2.toString else x._1)

  def convert(x: Int): String = {
    convert(1 to x)(x - 1)
  }

  def convert(input: Range): Seq[String] = {
    fizzBuzz.take(input.end)
  }

  def cycle[T](a: T*) = Stream.continually(a.toSeq).flatten

}