mkOption.scala

def parseInt1( s : String) : Option[Int] = {
   try {
     Some(s.toInt)
   }  catch {
     case  _ :  Throwable => None
   }
}
  
def parseInt2(s: String): Option[Int] = {
    Try(s.toInt) match {
      case Success(i) => Some(i)
      case Failure(_) => None
    }
}

def mkOptions[A,B]( trans: (A => B)) : (A => Option[B]) = {
    a => scala.util.Try(trans(a)) match {
      case scala.util.Success(i) => Some(i)
      case scala.util.Failure(_) => None
    }
}