+-- http://hackage.haskell.org/trac/haskell-prime/wiki/RemoveNPlusK
+-- Ugg... GHC could at least give a meaningful error message. ~ Matt 2011-08-27
+padWith e n (h:t) =
+ if n == 0 then error "padWith: list is already longer than the requested length"
+ else h:(padWith e (n-1) t)