Hi Jim, Thanks so much! Using 'def' instead of 'defn' when defining a function composed of functions was what I was missing.
I can't believe I spent an hour trying to figure this out -- it seems very obvious now. Doh! :) On Nov 8, 6:50 pm, Jim Crossley <jcrossl...@gmail.com> wrote: > Hi > > Aquahappy <joshua.ay...@gmail.com> writes: > > [...] > > > 1: (define (compose f g) (lambda (x) (f (g x)))) > > 2: (define (twice f) (compose f f)) > > 3: (define fourth (twice sq)) > > 4: (fourth 3) > > > I've gotten this far and then I get stuck when I try to do line 2 from > > the above: > > > 1: (defn compose [f g] #(f (g %))) > > This is what I came up with. Note I also defined the sq function. > > user=> (defn compose [f g] #(f (g %))) > #'user/compose > user=> (defn twice [f] (compose f f)) > #'user/twice > user=> (defn sq [x] (* x x)) > #'user/sq > user=> (def fourth (twice sq)) > #'user/fourth > user=> (fourth 3) > 81 > > Jim -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
