Longest Palandrome in Scala

Palandrome.scala

object Palandrome {

  def main(args: Array[String]) {
    val s = "meow woow ooooooo doggies aaadddfffdddaaa wow"
    println("finding the longest palandrome of: " + s)
    println(longestPal(s))
  }

  def longestPal(s: String) = {
    longestPalN(s, s.length)
  }

  def longestPalN(s: String, n: Int): String = {
    s.sliding(n).find(s => s == s.reverse) match { case Some(s) => s; case None => longestPalN(s, n-1)}
  }

}