Simple Scala console app which handles user's input asynchronously

scala-async-console-io.scala

package user.demo

import scala.concurrent.ExecutionContext.Implicits.global
import scala.concurrent.duration._
import scala.concurrent.{Await, Future}

/**
 * Scala console app which handles user's input asynchronously. 
 * Each user answer should be set to default value by timeout. 
 */
object DemoApp extends App {
  @volatile var terminated = false
  val questions = ("What is your name?", "John Doe") ::("What is your age?", 20) ::("Where are you from?", "USA") :: Nil
  val answers = for (q <- questions) yield {
    terminated = false
    println(q._1)
    val f = Future {
      var buf: List[Char] = Nil
      while (!terminated) {
        if (Console.in.ready()) {
          val ch = Console.in.read()
          if (ch.toChar == 10) terminated = true
          else buf = ch.toChar :: buf
        }
      }
      buf.reverse.mkString
    }
    try {
      Await.result(f, 5.seconds)
    } catch {
      case _ =>
        terminated = true
        q._2
    }
  }
  answers foreach println
}