-scala: function composing

Application.scala

val f: PartialFunction[Int, Boolean] = {
  case 1 => true
  case 2 => true
  case 3 => true
}

val g: PartialFunction[Boolean, Int] = {
  case true  => 1
  case false => 2
}

val c: Boolean => Boolean = { // NB: type is composed too: Bool -> Int -> Bool
  f compose g // function composing
}

println { c(true)  }
println { c(false) }