ScalaのStreamで書いたFizzBuzz

FizzBuzz.scala

object FizzBuzzStream {
  def apply(fizz: Int = 3, buzz: Int = 5): Stream[String] = {
    def stream(i: Int): Stream[String] = {
      val s = (i % fizz, i % buzz) match {
        case (0, 0) => "FizzBuzz"
        case (0, _) => "Fizz"
        case (_, 0) => "Buzz"
        case _ => i.toString
      }
      s #:: stream(i + 1)
    }

    stream(1)
  }
}

object FizzBuzz extends App {
  println(FizzBuzzStream() take 100 mkString " ")
}