> > but although I changed else expresion, Racket sometimes returns same > warning(but now with #f instead of #<void>).
After you call `select-room`, you'll want to check that the result is an mlist (instead of #f or #<void>) before calling mcdr. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
