FizzBuzz.scala

val theRange = 1 to 100
def mapper(x:Int):String = {  
  require(x>0) 
  (x % 3, x % 5) match {  
    case (0,0) => "FizzBuzz"
    case (0,_) => "Fizz"    
    case (_,0) => "Buzz"    
    case _ => x.toString    
  }
}

theRange.map{mapper(_)}.foreach(println)