Duane, no! You'll make god cry!

gistfile1.scala

val (unseenItems, changedItems, unchangedItems, status) = items.getData.grouped(3).map(_.toList).
  foldLeft[(List[MediaFeedData], List[MediaFeedData], List[MediaFeedData], Map[String, Long])]((Nil, Nil, Nil, Map.empty))({
    case ((unseenSoFar, changedSoFar, unchangedSoFar, statusMap), unseen :: changed :: unchanged :: Nil) => {
      (
        unseen :: unseenSoFar,
        changed :: changedSoFar,
        unchanged :: unchangedSoFar,
        statusMap ++ Map(unseen.getId -> 0L,
          changed.getId -> (changed.getComments.getCount.toLong - 1L),
          unchanged.getId -> unchanged.getComments.getCount.toLong))
    }
  })