On Mon, Apr 28, 2014 at 3:47 PM, Matthias Felleisen <matth...@ccs.neu.edu>wrote:
> o Are you a student learning to program? > o Are you an experienced programmer learning to use Racket? > (why "/learning/ to use Racket"? I could well be that s/he's on a new machine) Why not simply "Choose a language" and give a list of the usual ones with explanations? define (gather-return-values f . s) > (call-with-values (lambda () (apply f s)) list)) > Why not something like `apply->list` or `apply/list`? (personally I usually call it `cvl` for call/values->list, but that's because I often use it on the command line, which makes going from `(foo 'a 'b 'c)` to `(cvl foo 'a 'b 'c)` effortless) > (define (nth-return-value i f . s) > (call-with-values > (lambda () (apply f s)) > (lambda l (list-ref l i)))) > Forgot to mention that I've had less need for this one as once you have `gather-return-values` it's easy enough to write `(second (gather-return-values foo 'a 'b 'c))`. Laurent
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