Hello!
I have defined a struct in some file (create.rkt) like this:
...
(provide create make-create)
(define-serializable-struct create (name key assigned-date due-date))
…
In client.rkt, given name, key, assigned-date, and due-date as well as an
out-port called out, I do:
(require "create.rkt"
I wrote two set-adds? Ugh, I didn't mean to. That code wouldn't even work due
to arity mismatch.
(set-add res (let ([v v]) v)) is more likely.
-Ian
- Original Message -
From: Sam Tobin-Hochstadt
To: J. Ian Johnson
Cc: users
Sent: Thu, 4 Oct 2012 19:46:36 -0400 (EDT)
Subject: Re: [racke
On Thu, Oct 4, 2012 at 7:01 PM, J. Ian Johnson wrote:
>
> By almost exactly I mean
> (let () (set-add res v))
>
> versus
>
> (let ([res res])
> (set-add (let ([v v])
> (set-add res (let () v)
These seem importantly different, in that:
(set-add v (set-add res v))
and
(set-add
In many cases this is a "no duh" since speed-up loops can be inconspicuously
small.
This post is regarding the macro writers' bill of rights, which I think Racket
is violating.
I have two definitional interpreters that are run in an "abstract
interpretation monad" if you will. One is syntactica
On Thu, Oct 4, 2012 at 4:21 PM, Ashley Fowler
wrote:
> 1. I need to cube (car ls) right?
> 2. I need to use cons to combine both.
>
That sounds pretty reasonable to me. Try it out!
Marco
> From: Marco Morazan [moraz...@gmail.com]
> Sent: Thursday, October
I developed my code using a recursive analysis.
From: Marco Morazan [moraz...@gmail.com]
Sent: Thursday, October 04, 2012 1:40 PM
To: Ashley Fowler
Cc: users@racket-lang.org
Subject: Re: [racket] cube-all
Tell us how you developed your code and we might be
From: Stephen Bloch [bl...@adelphi.edu]
Sent: Thursday, October 04, 2012 3:38 PM
To: Ashley Fowler
Cc: users@racket-lang.org
Subject: Re: [racket] cube-all
On Oct 4, 2012, at 12:17 PM, Ashley Fowler
mailto:afowl...@broncos.uncfsu.edu>> wrote:
I need to write a
On Oct 4, 2012, at 12:17 PM, Ashley Fowler wrote:
> I need to write a function that takes a list and cubes the whole list, for
> instance, (cube-all '(3 4 2 5)) returns (27 64 8 125).
OK, that's one good test case. My students would be dinged for writing only
one, but maybe your instructor
Tell us how you developed your code and we might be able to tell you
where you went wrong.
On Thu, Oct 4, 2012 at 12:17 PM, Ashley Fowler
wrote:
> I need to write a function that takes a list and cubes the whole list, for
> instance, (cube-all '(3 4 2 5)) returns (27 64 8 125).
>
> So far I have
;; [Listof Number] -> [Listof Number]
;; cube all numbers on l and collect in list
(define (cube-all l) (map (λ (n) (expt n 3)) l))
(check-expect (cube-all '(3 4 2 5)) '(27 64 8 125))
On Oct 4, 2012, at 12:17 PM, Ashley Fowler wrote:
> I need to write a function that takes a list and cubes
I need to write a function that takes a list and cubes the whole list, for
instance, (cube-all '(3 4 2 5)) returns (27 64 8 125).
So far I have the code below, but it is not working out like I want it to. Any
advice or suggestions?
(define cube-all
(lambda (ls)
(if (null? ls)
ls
(cons(car l
Once again: checked signatures are available in ASL with German documentation.
When I know how to integrate them and what I am paying for them, I may change
the teaching languages.
On Oct 4, 2012, at 9:18 AM, Stephen Bloch wrote:
>
> On Oct 4, 2012, at 8:33 AM, Matthias Felleisen wrote:
>
As Asumu said, we're going to tackle small improvements that don't
require lots of design and coordination, and that can be distributed
among lots of people in parallel. Of course, people are free to hack
on whatever they like, but I wouldn't encourage large projects like
revising the teaching lan
On Oct 4, 2012, at 8:33 AM, Matthias Felleisen wrote:
> That wouldn't help much because none of the 2htdp/* libraries provide checked
> signatures.
But if we had a good signature system for the teaching languages, we could
easily add signatures to 2htdp/*, couldn't we?
Seriously, I'd love t
That wouldn't help much because none of the 2htdp/* libraries provide checked
signatures.
On Oct 4, 2012, at 4:55 AM, Todd O'Bryan wrote:
> Maybe signatures for the teaching languages? Maybe?
>
> On Wed, Oct 3, 2012 at 9:37 PM, Asumu Takikawa wrote:
>> On 2012-10-03 16:21:10 -0600, Danny Yo
We've got a couple of Windows labs with DrRacket 5.2.1 installed, and we're
seeing really terrible response times: with a fairly short, simple graphics
program (using the picturing-programs library) operating on small images, we
click "run" and wait 20-30 seconds for a response.
I'm not actuall
Maybe signatures for the teaching languages? Maybe?
On Wed, Oct 3, 2012 at 9:37 PM, Asumu Takikawa wrote:
> On 2012-10-03 16:21:10 -0600, Danny Yoo wrote:
>> Any details on what we'll be hacking on after Racketcon?
>
> The plan is to hack on small, self-contained improvements such as
> documentat
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