gistfile1.scala

val goto  = Command("goto",     "Teleport to a player.", args(player or (num ~ num ~ opt(num))){
    case you ~ Left(them) => you.teleportTo(them)
    case you ~ Right(x ~ y ~ Some(z)) => you.teleport(you.world(x, y, z))
    case you ~ Right(x ~ z ~ None) =>
      you.teleportTo(you.world.getHighestBlockAt(you.world(x, 0, z)))
  })




  def toPlayer(cs:CommandSender): Player =
    if(cs.isInstanceOf[Player]) cs.asInstanceOf[Player]
    else ConsolePlayer.player

  override def onCommand(sender: CommandSender, cmd: BukkitCommand,
                         commandLabel: String, args: Array[String]) = {
    val p = toPlayer(sender)
    for (ch <- lowers.get(cmd.getName.toLowerCase))
      try ch.body.f(p, cmd, args.toList)
      catch { case e: Exception =>
        p ! (e.getMessage + "\n" + e.getStackTraceString)
        e.printStackTrace
      }
    true
  }