[racket-dev] actionable items, was: comments on "comments on learning Racket"

From: Laurent (laurent.orseau at gmail.com)
Date: Mon Apr 28 10:08:24 EDT 2014

On Mon, Apr 28, 2014 at 3:47 PM, Matthias Felleisen <matthias at 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

Why not simply "Choose a language" and give a list of the usual ones with

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))`.

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