ScalaSum.scala

package com.pkukielka

import scala.actors.Futures._

object ScalaSum {
  def sum(r: Range): Long = { var i = r.start; var sum = 0L; while (i <= r.end) { i += r.step; sum += i }; return sum }
  val cores = Runtime.getRuntime().availableProcessors()
  val jobs = (1 to cores).map(_ to 1234567890 by cores).map(range => future(sum(range)))
  
  def main(args: Array[String]) {
    println(awaitAll(5000, jobs: _*).map(_.get.asInstanceOf[Long]).sum)
  }
}