> On Dec 4, 2019, at 2:39 PM, 'Joel Dueck' via Racket Users
> <racket-users@googlegroups.com> wrote:
>
> So it seems easy to match "at least N identical elements".
> But is there a method for matching "no more than N identical elements"?
?
#lang racket
(require rackunit)
(define (super-cool? lst)
(match lst
[(and (list* _ ... a a _)
(not (list* _ ... a a a _))) #t]
[_ #f]))
(check-true (super-cool? '(1 1 4)))
(check-false (super-cool? '(1 1 1 4)))
--
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.
To view this discussion on the web visit
https://groups.google.com/d/msgid/racket-users/1734093C-0C39-4289-9747-41CAFB35851F%40mbtype.com.
