all pattern extracted to there own partial function

PatternMatch.scala

object Test extends App {

  def x(in: Any): List[String] = in match {
    case i: Int => List(i.toString)
    case s: String => List(s)
    case xs: List[_] => xs flatMap x
    case _ => Nil
  }

  val y1: PartialFunction[Any, List[String]] = _ match {
    case i: Int => List(i.toString)
  }

  val y2: PartialFunction[Any, List[String]] = _ match {
    case s: String => List(s)
  }

  val y3: PartialFunction[Any, List[String]] = _ match {
    case xs: List[_] => xs flatMap y
  }

  def y(in: Any): List[String] = {
    val xs = List(y1, y2, y3)
    xs find (_ isDefinedAt in) map (_(in)) getOrElse Nil
  }

  val xs = List(List(1, 2, "hello"), "abc", 3, List(4))

  println(x(xs))
  println(y(xs))
}