import org.joda.time.DateTime
import org.joda.time.DateTimeConstants._

object DateConditions extends App {

  val messages: List[(DateTime => Boolean, String)] = List(
    ((d: DateTime) => d.getDayOfWeek == WEDNESDAY) -> "Wed",
    ((d: DateTime) => d.getDayOfWeek == FRIDAY) -> "Fri"
  )

  def message(date: DateTime) =
    messages.find(_._1(date)).map(_._2).getOrElse("Default")

  println(message(new DateTime(2010, 3, 3, 0, 0, 0)))
  println(message(new DateTime(2010, 3, 4, 0, 0, 0)))
  println(message(new DateTime(2010, 3, 5, 0, 0, 0)))
}