TraitNoob.scala

trait HasAString[A] {
  def getTheString( a: A ): String
}
// This shenanigan has been pulled from Scalaz Functor definition
object HasAString {
  @inline def apply[A](implicit a:HasAString[A]): HasAString[A] = a
}

object Zuh {
  implicit val wutHasAString: HasAString[Wut] = new HasAString[Wut] {
    def getTheString( a:Wut ): String =
      a.totes.has.string
  }
  
  def zooms[A: HasAString]( xs: List[A] ): List[A] =
    xs.foldr(List.empty[A])( (x,acc) => {
      val s = HasAString[A].getTheString(x)
      fugfug(x, s) :: acc
    })
}