In Scala using the par function: https://gist.github.com/4199415 https://gist.github.com/4199415 def ip(host:String)=java.net.InetAddress.getAllByName(host

In Scala using the par function: https://gist.github.com/4199415 https://gist.github.com/4199415 def ip(host:String)=java.net.InetAddress.getAllByName(host)(0).getHostAddress var map = Map[String,String]() val hosts = List("google.com","twitter.com","facebook.com") hosts.par.map(host => (host,ip(host))).foreach(hostip => map+=(hostip._1->hostip._2)) scala> map res1: scala.collection.immutable.Map[String,String] =Map(google.com -> 74.125.224.71, twitter.com -> 199.59.150.7, facebook.com -> 69.171.229.16)