InverseFizzbuzz : http://www.jasq.org/2/post/2012/05/inverse-fizzbuzz.html

InverseFizzbuzz.scala

// Inversefizzbuzz
//  http://www.jasq.org/2/post/2012/05/inverse-fizzbuzz.html
//
// fork from https://gist.github.com/2699068
object InverseFizzbuzz extends App {

  def zzubzzif(pattern:Seq[String]) = {
    def fizzbuzz(n:Int) = (n%3, n%5) match{
      case (0,0) => "fizzbuzz"
      case (0,_) => "fizz"
      case (_,0) => "buzz"
      case _     => ""
    }

    val n = Stream.from(0).map(fizzbuzz).indexOfSlice(pattern)
    (n until (pattern.size + n)) toList
  }

  def _p(s:Seq[String]) = {
    println("pattern : %s" format (s.map{s => s.mkString("'", "", "'")}))
    println(zzubzzif(s))
    println("")
  }

  _p(Seq("fizz"))
  _p(Seq("buzz"))
  _p(Seq("fizz","","buzz"))
  _p(Seq("fizz","buzz"))
  _p(Seq("buzz","fizz"))
  _p(Seq("fizz","","buzz","fizz"))
  _p(Seq("fizz","","","fizz"))
  _p(Seq("fizz","","","fizz","buzz"))


  // Result:
  //
  // pattern : List('fizz')
  // List(3)
  //
  // pattern : List('buzz')
  // List(5)
  //
  // pattern : List('fizz', '', 'buzz')
  // List(3, 4, 5)
  //
  // pattern : List('fizz', 'buzz')
  // List(9, 10)
  //
  // pattern : List('buzz', 'fizz')
  // List(5, 6)
  //
  // pattern : List('fizz', '', 'buzz', 'fizz')
  // List(3, 4, 5, 6)
  //
  // pattern : List('fizz', '', '', 'fizz')
  // List(6, 7, 8, 9)
  //
  // pattern : List('fizz', '', '', 'fizz', 'buzz')
  // List(6, 7, 8, 9, 10)
}