Functional FizzBuzz

FizzBuzz.scala

// adapted from this great paper:
// https://themonadreader.files.wordpress.com/2014/04/fizzbuzz.pdf

def fb(n: Int): String = {
  def test(d: Int, s: String)(x: String ⇒ String)(v: String): String =
    if (n % d == 0) s + x("") else x(v)

  (test(3, "fizz") _ compose test(5, "buzz"))(identity)(n.toString)
}

def fizzbuzz(n: Int): Seq[String] =
  for (i ← 1 to n) yield fb(i)

def main(args: Array[String]): Unit =
  println(fizzbuzz(args(0).toInt).mkString("\n"))