gistfile1.scala

object Main {
  def main(args:Array[String]) {
    val re = "[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?".r

    val source = scala.io.Source.fromFile(args(0))
    source.getLines
          .filter(x => x.length > 0)
          .map(x => re.findFirstIn(x) != None)
          .foreach(println)
  }
}