Scala define stream with JodaTime

Question

I'm just starting my journey with scala. I'm trying to define an implicit conversion that will make it possible to iterate over each day in a period of time in this way:

for (day <- firstDay until lastDay) {
  // a lot of interesting code goes here
}

What I managed to do so far is something like this:

implicit class DateTimeWithUntil(from: DateTime) {
  def until(to: DateTime): Stream[DateTime] =
    from #:: from.plusDays(1)
}

What is the way to implement until method? Is the Stream appropriate for this? Or should it be Iterator or Seq? Or other?

Thanks

Answer 1

I think you are looking for something like this:

import org.joda.time._

implicit class DateTimeOps (startDt: DateTime) {
  def until(endDt: DateTime) = for(dayNo <- 0 until Days.daysBetween(startDt, endDt).getDays) yield(startDt.plusDays(dayNo))
}

for(day <- new DateTime() until new DateTime().plusDays(10)) println (day)

Hope it helps.