On Thu, 28 Jan 2016 16:30:57 -0600, Brian Adkins wrote: > > I'm sure this is a really bad idea, but I couldn't resist after finding > section 3.3.8 in the Dr. Racket documentation - what fun :) > > (define (∃ member list) > (cond [ (∅? list) ∅ ] > [ (≡ member (α list)) list ] > [ else (∃ member (ω list)) ])) > > (∃ 8 '(3 9 8 5)) > > Using "alpha" for "car" kind of makes sense, but using "omega" for > "cdr" really doesn't - I expect it should return the last element of > the list, but I couldn't think of any greek symbol that might mean > "tail".
Δ ? (also works with a:car :: d:cdr :) ) Vincent -- 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.
