On Thu, Feb 23, 2012 at 11:47 AM, Prabhakar Ragde <plra...@uwaterloo.ca> wrote:
> Neil Toronto wrote:
>
>> What's your favorite not just computable, but tweetable function?
>
>
> (define (r n)
> (for/fold ([s 1] [l '()]) ([i n])
> (values (/ 1 (- (* 2 (floor s)) s -1)) (cons s l))))
>
> I tweeted this to make sure it fit. I had 23 characters to spare, could
> squeeze a bit of whitespace out, then use the rest to make it more elegant,
> but I have actual work to do... --PR
What is this thing? It seems coolly symmetric in this view:
(require plot)
(plot (points (let-values ([(n l) (r (expt 2 12))])
(for/list ([i (in-naturals)]
[x (in-list l)])
(vector i x)))))
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