Google+ forum
BTW, Google+ is disappearing soon[1], which is yet another reason to
encourage people to -- rather than fragment our small community amongst
every upstart you're-the-product social media play -- instead use the
official `racket-users` forum (available as both email list and
Thanks Jon.
yes. I did, and you are right. I posted the same question a Google+ forum
(https://plus.google.com/108613325307702875646/posts/1BaDJFoat4D), and I
also got a reply that:
"John is being parsed as a variable, and thus, its binding is looked up in
the local environment. Of course,
On Sun, Jan 13, 2019 at 12:37 AM Hassan Shahin wrote:
> Thanks Jack and Mike!
>
> You are right. Arguments to procedures will be evaluated before the
> invocation of the procedure.
>
This is true, but it's not really the issue in your case. Even in #lang
lazy, which does not eagerly evaluate
Thanks Jack and Mike!
You are right. Arguments to procedures will be evaluated before the
invocation of the procedure. I thought that because (if) is not an ordinary
procedure, and because one can express if in terms of cond (or vice versa)
that my procedure is also a non ordinary procedure,
On Sat, 12 Jan 2019 at 21:12 -0800, Hassan Shahin wrote:
> When I apply the procedure to 'John it will evaluate to 'symbol. The idea
> of the procedure is to check the "type" of the given item, which is not
> decided aprior. If I give it 'John I know it is a symbol.
> May be my question should
Thanks Mike.
When I apply the procedure to 'John it will evaluate to 'symbol. The idea
of the procedure is to check the "type" of the given item, which is not
decided aprior. If I give it 'John I know it is a symbol.
May be my question should be formulated as this: Since John is not a pair,
an
You need to apply the function to 'John, with a single quote in front of
it. The word John without that quote is just a variable reference to
something that you have not actually defined.
On Sat, Jan 12, 2019 at 11:34 PM Hassan Shahin wrote:
> I have this definition for a procedure:
>
> (define
I have this definition for a procedure:
(define type-of (lambda (item)
(cond
[(pair? item) 'pair]
[(null? item) 'empty-list]
[(number? item) 'number]
[(symbol?
Hi Matthew et al.,
Following up some work from last fall:
On Oct 6, 2018, at 15:58, Matthew Flatt wrote:
> At Wed, 26 Sep 2018 15:57:12 -0700, Jordan Johnson wrote:
>>> (require racket/sandbox)
>>> (make-evaluator "beginner-lang.rkt")
>> . . ../../../../../../../../Applications/Racket
>>
FIGLIO DI PUTTANA ANGELO LIETTI DI MEDIOLANUM, NDRANGOLANUM, MAFIOLANUM,
HITLERANUM! TENEVA I RAPPORTI CON GLI IMPRENDITORI ASSASSINI DI COSA
NOSTRA: FRANCESCO ZUMMO E IGNAZIO ZUMMO! AI TEMPI DELL'ARRESTO
DELL'AVVOCATO PEDOFILO E NAZI: PAOLO SCIUME'! VERME SCHIFOSISSIMO ANGELO
LIETTI:
On Sat, Jan 12, 2019 at 06:44:26PM +0100, Tomasz Rola wrote:
> On Sat, Jan 12, 2019 at 11:10:27AM +0100, 'Paulo Matos' via Racket Users
> wrote:
> >
> >
> > On 11/01/2019 17:23, Greg Trzeciak wrote:
> > > What would be really neat if https://pkgs.racket-lang.org/ would include
> > > date-added
Thanks Ben. Good to know. Hey Robbie, it's been a while. Hope everything is
going well. Great book. :)
-mike
On Jan 12, 2019 12:04, "Robby Findler" wrote:
Hi Mike! Thanks for pointing this out. I've updated the errata
(Thanks, Ben for those links; I was having trouble finding the date of
the
On Sat, Jan 12, 2019 at 11:10:27AM +0100, 'Paulo Matos' via Racket Users wrote:
>
>
> On 11/01/2019 17:23, Greg Trzeciak wrote:
> > What would be really neat if https://pkgs.racket-lang.org/ would include
> > date-added to all the packages. This way one could create automatic list
> > of newly
Hi Mike! Thanks for pointing this out. I've updated the errata
(Thanks, Ben for those links; I was having trouble finding the date of
the change.)
Robby
On Sat, Jan 12, 2019 at 4:41 AM Mike MacHenry wrote:
>
> Hey everyone,
>
> I'm having an issue with one of the examples from Semantics
You discovered a backwards incompatible change to Redex. Changing M
and N to A and B is a good fix. (The errata really should talk about
this.)
Here are two related threads:
https://groups.google.com/d/msg/racket-users/be54SG881GU/bndA4eiGAQAJ
Hi
Can can anyone point me to any package or other Racket code that uses the
Racket OpenCV package ?
https://github.com/oetr/racket-opencv
Kind regards,
Stephen
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On Sat, Jan 12, 2019 at 10:55 AM Zhonghua Zhu
wrote:
> I am writing a tcp server program.
> Server uses non-blocking reading and client uses write-bytes, then server
> never read any bytes and write-bytes returns the right value.
> But when I change client's write-bytes
I am writing a tcp server program.
Server uses non-blocking reading and client uses write-bytes, then server
never read any bytes and write-bytes returns the right value.
But when I change client's write-bytes to write-bytes-avail, server
receives bytes immediately.
I don't know why this
I don't think I mentioned newsletter before but I did raise the issue of
missing date-added in packages before - my expertise is in data
usefulness/usability so it really hurts my feelings ;)
I agree about hidden gems I stumble upon by pure chance.
>From time to time I try to search pkgs site
Hey everyone,
I'm having an issue with one of the examples from Semantics Engineering
With PLT Redex. Specifically in 12.3 on page 225, the definition for the
iswim-standard reduction relation. As printed in the book, I get the error
"reduction-relation: shortcut name may not be a non-terminal
On 11/01/2019 17:23, Greg Trzeciak wrote:
> What would be really neat if https://pkgs.racket-lang.org/ would include
> date-added to all the packages. This way one could create automatic list
> of newly added packages and let's say distribute it in the newsletter
Which newsletter are you
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