Convert numbered 3 digit chunks and stack them for later

Mapper.scala

import scala.actors.Actor.self
import scala.actors.remote.RemoteActor.{ select, register, alive }
import scala.actors.remote.Node
import scala.actors.Actor
import scala.collection.mutable.Map

import NumberText1.conv

object Mapper {
    def main(args: Array[String]) {
        println("Mapper running")

        val actor = new Actor {
            def act {
                alive(System.getProperty("port").toInt)
                register('mapper, self)

                val map = Map[Int, String]()
                val reducer = select(Node("localhost", System.getProperty("reducer").toInt), 'reducer)
                loop {
                    receive {
                        case (k: Int, n: Int) ⇒ println("Received " + n); map += (k -> conv(n))
                        case "Done"           ⇒ println("Sending " + map); reducer ! map; exit
                    }
                }
            }
        }

        actor.start
    }
}