Joao Azevedo jcazevedo

I hereby claim:

To claim this, I am signing this object:

	import scala.util.Random

	object PStack {
	type Any = PStack[_, _]
	}

	sealed trait PStack[A, B <: PStack.Any] {
	def pop2: Option[(A, B)]
	def push0[C](elem: C): PStack[C, PStack[A, B]] =
	NonEmptyPStack(elem, this)

	import scala.actors.Future
	import scala.actors.Futures._

	object SleepSort {
	def main(args: Array[String]) = {
	var sorted = List[Int]()
	var futures = for (a <- args) yield future {
	Thread.sleep(a.toInt * 1000)
	sorted :::= List(a.toInt)
	a.toInt