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 [email protected]. For more options, visit https://groups.google.com/d/optout.
