The stomping on I was worried about would happen at a lower-level as
I don't think that, in general, dynamic-require is thread-safe. After
all, it loads and runs arbitrary code, altho in this case it appears
to be a system level lack of thread safety? I'm still not completely
sure, but since you s
I don't know what's going on here, but could it be that two threads
are, in parallel, trying to load the same implementation of an
unloaded checker and then stomping on each other?
The file handin-server/private/reloadable has some dynamic-requires
without appropriate syncronization around them, a
Possibly you were printing something out? If you have expressions that
produce non-void results at the top of a "#lang racket" program, they
will print out, which can trigger creation of the console window.
Robby
On Sun, Nov 22, 2015 at 4:41 PM, Champignac wrote:
> On Sunday, 22 November 2015 16
On Fri, Nov 20, 2015 at 4:38 AM, Josh Grams wrote:
> On 2015-11-17 06:43AM, Robby Findler wrote:
>>On Mon, Nov 16, 2015 at 7:11 PM, Josh Grams wrote:
>>> - DrRacket: is there some way to set a key binding to rename a *variable*?
>>
>>c:x;m under mac os x. You may
On Mon, Nov 16, 2015 at 7:11 PM, Josh Grams wrote:
> I've spent a week or two with 2htdp/universe in preparation for doing a
> little intro to Racket talk. And...I have a few little things:
>
> - DrRacket: is there some way to set a key binding to rename a symbol?
> It's annoying that I have to
15 PM, Alex Knauth wrote:
>
>> On Nov 15, 2015, at 6:06 PM, Robby Findler
>> wrote:
>>
>> So it is probably something about the program you are editing, then.
>> Can you get a segfault is you run it from the command line (or just
>> compile it)?
>
> No
So it is probably something about the program you are editing, then.
Can you get a segfault is you run it from the command line (or just
compile it)?
Robby
On Sun, Nov 15, 2015 at 4:57 PM, Alex Knauth wrote:
> That seems to keep it from happening.
>
>
>> On Nov 15, 2015, at
What if you disable background expansion?
Robby
On Sun, Nov 15, 2015 at 3:52 PM, Alex Knauth wrote:
> I've gotten it several more times now, and it seems to happen in response to
> me typing something, but it doesn't happen when I type one character, then
> save, then type another character.
Hi Thomas: thank you for participating in the Racket community and
submitting reports that help us improve the docs and the
implementation.
Love & Peace,
Robby
On Wed, Nov 11, 2015 at 12:00 PM, Thomas Dickerson
wrote:
> On Tuesday, October 27, 2015 at 7:24:55 AM UTC-4, Matthew Flatt wrote:
>> T
How much memory do you have on your machine? 0.25 seconds per
keystroke sounds worse than expected.
Robby
On Sun, Nov 8, 2015 at 8:18 PM, Nota Poin wrote:
> On Monday, November 9, 2015 at 1:38:56 AM UTC, Matthias Felleisen wrote:
>> Use drracket.
> Yeah, I would, but it takes about 30 seconds to
I think it woudl be kind of cool to add abort and call/cc (plus a good
set of delimited operators, of course) to ASL or to define ASL+ as
including those. (Or maybe ASL-- and take out state?)
I can see John's point about the work involved, but it is hard to
imagine a better learning environment fo
Very cool!
On Wednesday, November 4, 2015, Andrew Kent wrote:
> Dear other PLT Redex users,
>
> Do you have any clever tricks/tools to make testing in PLT Redex
> more palletable? I was finding some of my tests had a lot more
> boiler-plate text than actual test-relevant code. I would love to
>
Yeah, perhaps I've drunk too much of the koolaid, but I'm not even
seeing an alternative interpretation that makes any sense!
Does it help to see the arrows in DrRacket? In particular the upward
pointing one that points at the 'y' in display's argument?
Robby
On Mon, Nov 2, 2015 at 6:32 PM, Ale
It was merged.
Robby
On Wed, Oct 28, 2015 at 10:55 AM, William J. Bowman
wrote:
> Did Paul's work just get merged into the main Redex package, or did this
> just get pushed to the wrong place?
>
> --
> William J. Bowman
>
> On Wed, Oct 28, 2015 at 10:25:37AM -0500,
st.rkt:324:3
>
> I notice that substitute recently changed to a metafunction--which is
> handy--and requires (default-language) be set. According to the
> documentation, (default-language) is only set inside metafunction and
> judgment-forms, *not* reduction-relations. Perhaps this is
syntax-original? is querying a private property and that property
isn't set on the syntax object argument given to the transformer. (I
would have said because of the extra mark that's put on the argument,
but that's not happening now, but we get the same behavior anyway.)
If you call syntax-local-
und
> to 'reindent-paragraph' which I had not found yet - If only I had searched
> 'paragraph'!) and I should be able to work with that and apply my own
> keybindings if necessary.
>
> Thanks for the help and sorry for the noise!
>
> -Andrew
>
> On Su
ile in OS X and
> Ubuntu, and it works in OS X, but not Ubuntu).
>
> On Sun, Oct 25, 2015 at 6:44 PM Robby Findler > wrote:
>
>> DrRacket has that when editing scribble files but not other ones. Is that
>> what you found?
>>
>> Robby
>>
>>
>&g
DrRacket has that when editing scribble files but not other ones. Is that
what you found?
Robby
On Sunday, October 25, 2015, Andrew Kent wrote:
> I know I've pressed meta-q in DrRacket and gotten the Emacs
> 'fill-paragraph' behavior (where it automatically wraps your text at ~70
> characters o
ningful than I initially thought—just because
> it’s a “private” property doesn’t mean macros can’t generate new syntax
> objects that are considered to be “original”?
>
> Anyway, thanks for your quick response! All seems to be well now.
>
>> On Oct 24, 2015, at 12:29 PM, Robby
Maybe you need to copy over the properties too? This seems to work:
#lang racket/base
(require (for-syntax racket/base))
(define-syntax (import stx)
(syntax-case stx ()
[(_ (a b))
#`(require #,(datum->syntax stx
(string->symbol (format "~a/~a"
(syntax-e
;
> On Wed, 21 Oct 2015 15:17:43 -0500,
> Robby Findler wrote:
>>
>> Well, one part of the answer is that DrRacket indents empty lines so
>> when type something like "(define (f x)x" the second "x" is in
>> a reasonable place. Perhaps it could behave
Well, one part of the answer is that DrRacket indents empty lines so
when type something like "(define (f x)x" the second "x" is in
a reasonable place. Perhaps it could behave differently, but
auto-indent-on-return seems less surprising than
auto-indent-when-typing-a-character-on-a-whitespace-line.
Unfortunately I'm afraid there isn't anything like that currently.
Robby
On Tue, Oct 20, 2015 at 11:20 AM, JCG wrote:
> The DrRacket editor allows me to nicely collapse s-expressions. However, the
> format of the file ceases to be useful source text, rendering it useless in
> non-current-rac
It isn't that it assumes a display size of 1024x768. That's really
more of an aspect ratio than anything. When you run the slideshow, it
will scale everything to fit (and use big black bars to preserve the
aspect ratio).
What happens if you just try it out on a big screen?
Or are you saying that
ge (again?), the message has gone. Ok, I just got confused by that
> message... and why it didn't go away after installing the package manually
> via 'raco planet fileinject'
>
>
> -----Original Message-
> From: Robby Findler [mailto:ro...@eecs.northwestern.edu ]
>
Are you seeing this error in the red line along the bottom of
DrRacket? If so, that is because the online expansion tool prohibits
network connections during compilation. (This message should go away
after the package is installed, however.)
Robby
On Fri, Oct 16, 2015 at 8:31 AM, Alexey Cherkaev
I love this message. Highlight of my day. :)
On Wednesday, October 14, 2015, Neil Van Dyke wrote:
> We are conducting a highly scientific poll.
>
> The question we want to answer is whether people would like for the Racket
> standard languages to have symbols that begin with the colon character
That's a great name. :)
Robby
On Mon, Oct 12, 2015 at 4:59 PM, Greg Hendershott
wrote:
> Oh, I love a good bikeshedding thread! ;)
>
> I think JCG nailed it:
>
> most
>
> - It's not excessively numeric.
>
> - Unlike "best" it's not judge-y or normative.
>
> - The polarity isn't _too_ weird f
Ah, sorry Alex. I mean "maximal" in the sense of this wikipedia page
(and also how I was taught in math class, so definitely a "mathy"
word(!)): https://en.wikipedia.org/wiki/Maximal_element
Robby
On Sun, Oct 11, 2015 at 9:48 PM, Alex Knauth wrote:
>
> On Oct 11, 2015, at 10:41 PM, Nadeem Abdul
That will work for newly typed text. Other code might changed the style and
copying and pasting styled text may change it. You can use after-insert to
change the style for those cases. Or maybe you want to allow that.
There is also, in the framework, editor:standard-style-list which uses a
global
Find-best is right to me. The "best" under < is the most negative number.
Find-maximal is also okay and slightly more accurate.
Robby
On Sunday, October 11, 2015, Alex Knauth wrote:
> Hi,
>
> Alexis King and I were discussing adding versions of argmin and argmax to
> the alexis/collection libra
On Thu, Oct 8, 2015 at 6:05 PM, 'John Clements' via Racket Users <
racket-users@googlegroups.com> wrote:
>
> Curiously, I think we’re still incorporated as PLT Scheme, Inc.
>
No, the name is officially "PLT Design Inc." (no comma).
Robby
--
You received this message because you are subscribed
Oh yeah? Well _I_ promote him to Grand Chief Design Office (GCDO)
though the powers bestowed on my by our CEO (little does he care).
Robby
On Thu, Oct 8, 2015 at 1:04 PM, Matthias Felleisen wrote:
>
> On Oct 8, 2015, at 12:06 PM, "'John B. Clements' via Racket Users"
> wrote:
>
>> I am not vo
On Thu, Oct 8, 2015 at 9:18 AM, Matthew Flatt wrote:
> At Wed, 7 Oct 2015 17:35:44 -0700 (PDT), Anurag Mendhekar wrote:
>> Having just submitted my first contribution to Planet
>
> [Note: We use the name "Planet" for an older package system. I see that
> you uploaded a package in the new system; a
In addition to agreeing with you and Sam here Alexis, I would like to
point out another thing that has worked well for Racket in design
situations such as these: benevolent despotism.
That is, the person in charge of the design is expected to fully and
deeply understand what they have designed and
Also, I would suggest that you use the package system, not planet for
new packages. Planet is a system we plan to continue to maintain, but
the package system is the future (and the present, really).
You can read more about how to get started here:
http://docs.racket-lang.org/pkg/index.html
Robby
They are the same number, no?
-> (= (make-rectangular -2 0) -2)
#t
-> (complex? -2)
#t
Robby
On Wed, Oct 7, 2015 at 10:07 AM, Tony Garnock-Jones wrote:
> On 10/07/2015 10:19 AM, Brian Adkins wrote:
>> If I instead call: (atanh (number->float-complex -2)) I do get a
>> complex result.
>
> I wa
Yes that is how you get it.
But I think that maybe instead you should use the save-port method of the
editor. That's how you get what drr puts into the files it saves. You
should get the metadata and the "only wxme format when there are images"
behavior.
Robby
On Sunday, October 4, 2015, Paolo G
On Friday, September 25, 2015, Paul Stansifer
wrote:
> Thanks for trying it out! It's exciting to have a user! The broken example
> is now fixed on GitHub.
>
> On Thursday, September 24, 2015 at 5:07:22 PM UTC-4, William J. Bowman
> wrote:
> > ...
> >
> > 1. It was not obvious to me that /binding
Yes, but only in a fairly complex way. Your rendering function would
have to call out to graphviz, get the results back as a png, use
read-bitmap to get the png back into Racket, create an image snip and
then insert that into the editor, using the more complex version of
the `pp` argument.
Here's
Also: for building enumerations, check out the data/enumerate library.
On Tuesday, September 22, 2015, Vincent St-Amour <
stamo...@eecs.northwestern.edu> wrote:
> Hi Erich,
>
> I haven't looked at your code in detail, but found a few potentially
> relevant bits of info on Wikipedia.
>
> First, it
On Sun, Sep 20, 2015 at 5:52 PM, Neil Van Dyke wrote:
> Matthias Felleisen wrote on 09/20/2015 05:46 PM:
>>
>> Can we please stay away from politics and leaning on politics?
>> I am sure everyone has different connotations with these kinds
>> of symbols.
>>
>
> I have a similar aversion to the Gra
>> This benchmark suggests about a 10x speed difference when the symbols are
>> different: http://pasterack.org/pastes/94877
>>
>> Sam
>>
>>
>> On Thu, Sep 17, 2015, 9:52 PM Robby Findler
>> wrote:
>>>
>>> FWIW, if you use equal? in thos
Paul Stansifer has been implementing the ideas from his dissertation
work in Redex and is now ready to share them with the world.
Thanks to Paul, Redex languages now understand binding structure,
meaning that if you write a substitution function that just blindly
substitutes, it will actually prop
On Thu, Sep 17, 2015 at 11:35 PM, Anthony Carrico wrote:
> On 09/17/2015 11:03 PM, Anthony Carrico wrote:
>> Really what I'm trying to say is that the language implementation
>> wants the freedom to adjust your program without having to be
>> constrained by eq tests that you might do. One example
On Thu, Sep 17, 2015 at 11:24 PM, Anthony Carrico wrote:
> But, here is an update:
>
> #lang typed/racket
>
> (require typed/rackunit)
> (define foo (mcons 1 1))
> (eq? foo foo)
> (check-eq? foo foo)
>
> And this is still broken.
This might be a bug. I'll defer to the TR maintainers on that.
>>
gh.
>
> Sam
>
>
> On Thu, Sep 17, 2015, 10:13 PM Robby Findler
> wrote:
>>
>> Sounds like something I would try to fix if I had time to really focus
>> on the eq? semantic question :(
>>
>> On Thu, Sep 17, 2015 at 9:01 PM, Sam Tobin-Hochstadt
>
but can be when using memq or similar.
> This benchmark suggests about a 10x speed difference when the symbols are
> different: http://pasterack.org/pastes/94877
>
> Sam
>
>
> On Thu, Sep 17, 2015, 9:52 PM Robby Findler
> wrote:
>>
>> FWIW, if you use equal? in thos
heavily for symbols in everyday application code.
>
> Robby Findler wrote on 09/17/2015 09:27 PM:
>>
>> eq? on symbols is a special part of the specification and that seems
>> benign to me, all things considered. The "giant hash in the sky" that
>> makes sure th
eq? on symbols is a special part of the specification and that seems
benign to me, all things considered. The "giant hash in the sky" that
makes sure that works isn't exactly trouble free, but we seem to have
it under control.
Robby
On Thu, Sep 17, 2015 at 8:25 PM, Neil Van Dyke
I think that we need to work harder to deemphasize eq?, and warn
people that, when eq? returns #f, really you learned nothing (like you
need to pretend you just didn't even call eq?). If it returns #t, then
you learn something, of course.
Robby
On Thu, Sep 17, 2015 at 8:03 PM, Sam Tobin-Hochstadt
Very nice!
Robby
On Wed, Sep 16, 2015 at 12:29 PM, Andrew Kent wrote:
> Good afternoon!
>
> I threw together a little bit of syntax that I find makes typesetting redex
> models much more convenient.
>
> The package, typeset-rewriter, is located here:
> https://github.com/andmkent/typeset-rewr
I think that what's happening here is that the optimizer can see that
the composition you wrote out is really (lamdba (x) (+ (+ (+ x 1) 2)
3)), but it cannot see through the use of compose.
In general you can use raco decompile to look at what the optimizer
has done (which is how I know it didn't
If you run "raco make -v cmdline2.rkt" you will see output if .zo
compilation is happening.
Robby
On Mon, Sep 14, 2015 at 8:16 PM, John Carmack wrote:
> No strace on Android, unfortunately.
>
>
>
> From: Marc Burns [mailto:m4bu...@uwaterloo.ca]
> Sent: Monday, September 14, 2015 8:10 PM
> To: J
There are multiple different options depending on what you want to do
with the data in the files.
If you just want to discard any graphical information and then use the
file with other tools, then this function will do that:
#lang racket
(require wxme)
(provide
(contract-out
[textify (-> path-
Unfortunately not.
Robby
On Sun, Sep 6, 2015 at 3:16 PM, Martin DeMello wrote:
> Hi,
>
> I'm working on the drracket-vim-tool, so I'm using a copy installed from my
> local directory. Is there a better way to reflect changes than quitting and
> restarting drracket?
>
> martin
>
> --
> You receiv
ides
> on-paint and draws its own cursor. The insertion point does not appear to be
> changed; the cursor display is just changed from a line between char@pos and
> char@pos+1 to a box covering char@pos+1
>
> https://github.com/takikawa/drracket-vim-tool/blob/master/private/text.
(add1 pos))]
>
> and I was trying to do the same for highlighting the sexp when the cursor is
> over the closing ), but I can't figure it out.
>
> martin
>
> On Sun, Sep 6, 2015 at 5:00 PM, Robby Findler
> wrote:
>>
>> I am not quite following wha
I am not quite following what you want to do. Can you give an example
interaction?
Robby
On Sunday, September 6, 2015, Martin DeMello
wrote:
> I'm trying to override the automatic backward-sexp highlighting in
> drracket to highlight the sexp based on the ) after the cursor rather than
> before
This a fantastic! Thank you for the access to old versions of Racket.
Robby
On Thu, Sep 3, 2015 at 6:29 PM, Jack Firth wrote:
>> Perhaps you could provide your Dockerfile etc. on Github so others could
>> look into it and maybe give some hints.
>
> I've got them up at https://github.com/jackfirt
rote:
>
>> On Sep 2, 2015, at 4:06 PM, Robby Findler
>> wrote:
>>
>> I was worrying because the internal representation may change (again) so
>> exposing the real constructor doesn't seem wise. But making a printer print
>> what you want (or using sel
ia Racket Users <
racket-users@googlegroups.com> wrote:
>
> > On Sep 2, 2015, at 3:59 PM, Robby Findler > wrote:
> >
> > It makes sense to me to make a printer that uses URL->string.
>
> Actually, I kind of don’t want that...
>
> Here’s my use case:
&
It makes sense to me to make a printer that uses URL->string.
On Wednesday, September 2, 2015, 'John Clements' via Racket Users <
racket-users@googlegroups.com> wrote:
> It appears to me that the # structure (as e.g. from net/url) is
> opaque. Is there any good reason for this? It’s kind of a pai
Oh, and I should point out that I forgot about sync/timeout. If you
pass 0 as the timeout, you can get the behavior you were asking for.
Sorry about that.
Robby
On Mon, Aug 31, 2015 at 7:51 PM, wrote:
> On Monday, August 31, 2015 at 4:58:01 PM UTC-7, Robby Findler wrote:
>> Y
Yes, right!
I agree that for a simple thing like just checking availability of a
message it feels like a lot. But when you get more complex
syncronization patterns it scales up very nicely.
Robby
On Mon, Aug 31, 2015 at 6:54 PM, wrote:
> On Monday, August 31, 2015 at 4:21:37 PM UTC-7, Ro
The usual way to do this is by building your own syncronization
pattern using an extra thread. There are situations where that isn't
efficient enough, but it often works great. Threads in racket aren't
heavy weight and using this "CML style" of programming is very
flexible and naturally leads to ve
+1
On Friday, August 28, 2015, Matthias Felleisen wrote:
>
> Yes, the inconsistency is frustrating. We are keeping it for backwards
> compatibility but it should be overcome with the addition of a different
> form of s-e in the future. Lucky you, we drilled ‘exampling’ and ‘testing’
> at the sum
I think you need to remove the local-require in the definition of
to-file in continued-fractions.rkt. This counts as a real require for
dependency purposes; it just makes the imports scoped locally.
dynamic-require is the way to get a require that happens only at
runtime (but in this case, if you d
Also, I think you'll generally find that TR performs better than plain
Racket when you don't have to interoperate with Racket (i.e., no
contracts).
Robby
On Mon, Aug 24, 2015 at 1:20 PM, Vincent St-Amour
wrote:
> On Mon, 24 Aug 2015 11:24:33 -0400,
> Rickard Andersson wrote:
>>
>> With regards t
(if (3 . t:divides? . x)
x
0)))
On Mon, Aug 24, 2015 at 8:18 AM, Robby Findler
wrote:
> It looks to me like the slowdown isn't entirely explained by contract
> checking, or perhaps TR isn't generating the contracts I would have
> guessed. With the program bel
It looks to me like the slowdown isn't entirely explained by contract
checking, or perhaps TR isn't generating the contracts I would have
guessed. With the program below, I see this output
cpu time: 1228 real time: 1228 gc time: 133
cpu time: 658 real time: 658 gc time: 18
cpu time: 80 real time:
Would it work to have your code expand into uses of
with-unquote-rewriter that chained things together?
Alternatively, I wouldn't mind if something like that were folded into
Redex itself and with-unquote-rewriters left as part of the public API
for backwards compatibility reasons.
And one other
Thanks! That was a bug. I've pushed a fix.
Robby
On Wed, Aug 19, 2015 at 5:52 PM, Matthew Butterick wrote:
> Below, I think `(func 42)` should raise exn:fail:contract, because `(func
> 42)` returns a number and the output contract for `func` specifies a boolean.
>
> And in 6.0 it does raise thi
(add users@ back)
On Tue, Aug 18, 2015 at 3:40 PM, Robby Findler
wrote:
> On Tue, Aug 18, 2015 at 3:33 PM, Paul van der Walt
> wrote:
>>
>> On 2015-08-18 at 22:02, quoth Robby Findler:
>>> What happens when you run this program? Do you see the white brackets
>>
Thanks. I've pushed a fix to this.
If you don't want to use a git-based build, you can use the keyword
#:filename, to work around the bug.
Robby
On Tue, Aug 18, 2015 at 2:41 PM, Paul van der Walt
wrote:
> Hello again,
>
> I have a minor issue, i want to render a collection of metafunctions
> i
as% [parent f] [paint-callback draw]))
(send f show #t)
On Tue, Aug 18, 2015 at 2:37 PM, Paul van der Walt
wrote:
> Hi Robby,
>
> On 2015-08-18 at 19:29, quoth Robby Findler:
>>> c) can i make the Unicode approach work? It seems like The Right Thing
>>>To Do.
On Tue, Aug 18, 2015 at 11:52 AM, Paul van der Walt
wrote:
> Hey Matthew,
>
> On 2015-08-18 at 18:16, quoth Matthew Flatt:
>> The change was probably the switch from using "homemade" white-brackets
>> to using the white-bracket Unicode character.
>
> OK, two questions:
>
> a) this fixes PDF genera
> (1) how grey is your cat?
The color of a television, tuned to a dead channel.
Robby
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For that you would have to write a (straightforward) compiler that
transformed a fully expanded Racket program into another program (in
that same language), inserting with-continuation-mark expressions
around every subexpression. Run the transformed program. Then, at the
point that you wish to comp
I suppose it depends on exactly what equivalence relation you have in
mind on the continuations. My best guess for a fruitful path forward
would be to do something like the "hack" that you suggest below, using
continuation marks to record the information you need until later to
compute the equivale
I agree this would be nice but I think the right way to approach it would
be to have metadata cached (via some more generic library supporting such
metadata) with exported libraries in a file near the .zo and .dep files.
Then drracket can figure out what is imported and then read those files for
th
It does seem useful. It would require some thought because the
exception handler cannot escape until there is no possibility of
resuming which seems like it would have UI implications. This would
also cause some REPL interactions to behave differently when they are
in the break-resumable context (n
Yeah, it's confusing. :(
Robby
On Sat, Jul 25, 2015 at 10:22 PM, Jack Firth wrote:
> Indeed it turns out I was missing something embarrassingly obvious. I was
> looking at the docs for the 2htdp/image functions, but using the pict
> functions.
--
You received this message because you are sub
Where do you see that documentation? This seems to say "diameter":
http://docs.racket-lang.org/pict/Basic_Pict_Constructors.html?q=circle#%28def._%28%28lib._pict%2Fmain..rkt%29._circle%29%29
Robby
On Sat, Jul 25, 2015 at 9:49 PM, Jack Firth wrote:
> So the documentation says that (circle 100) p
Just in case, you might want to check out Racket's places and futures
constructs.
On Friday, July 24, 2015, Dmitry Igrishin wrote:
>
>
> 2015-07-24 2:48 GMT+03:00 Neil Van Dyke >:
>
>> On Racket, CL, limits, programmers...
>>
>> I've found that most stuff can be done in Racket, and, though I ha
> #lang racket
> (struct foo (bar))
> (define x (foo 2))
> (foo-bar x)
>
> I can use the rename tool to rename bar to baz and get:
>
> #lang racket
> (struct foo (bar))
> (define x (foo 2))
> (foo-bar x)
>
>
>
>
> ~Leif Andersen
>
> On Wed, Ju
No, I don't think that this can be made to work with the current
sub-range-binders. The way DrRacket thinks about this is that those
are two different binders (symb and symb?), and you are renaming
either one of them or the other one. It can't connect them the way you
are seeming to want to connect
It isn't set up for that but if you want to add a few that's fine.
Robby
On Tuesday, July 14, 2015, Prabhakar Ragde wrote:
> Is there a simple way to extend the list of these and/or provide synonyms?
> (DrRacket documentation, section 3.3.8.) I would like to, for example, be
> able to type \and
We clearly need keyboards like this:
http://9gag.com/gag/5551148/the-entire-chinese-keyboard
On Fri, Jul 3, 2015 at 1:43 PM, Stephen Chang wrote:
>> The prefixes are based on this file:
>> https://github.com/racket/gui/blob/master/tex-table/tex-table.rkt
>>
>> Maybe there are missing ones you're
On Fri, Jul 3, 2015 at 12:52 PM, Stephen Chang wrote:
> I've been going this route more, especially because DrRacket supports
> autocompletion of (what it deems) unique latex prefixes.
The prefixes are based on this file:
https://github.com/racket/gui/blob/master/tex-table/tex-table.rkt
Maybe th
You also have unicode available to you. IDE support can help with this
-- I think the cmd-\ for lambda has worked pretty well.
Robby
On Fri, Jul 3, 2015 at 12:36 PM, Stephen Chang wrote:
>> What symbols have the least historic baggage?
>
> I've gone through this exercise a few times, and each ti
That sounds like it would be a very nice change.
The option you want is in the view menu.
Robby
On Friday, July 3, 2015, Jens Axel Søgaard wrote:
> Hi All,
>
> During the installation of DrRacket on a new laptop I realized
> that the preferences dialog could need some kind of info
> on each av
Hi Yuhao: The Scribble indentation mode is currently implemented by
adding a keymap that overrides the tab key. You can find the
implementation here of the callback itself here:
https://github.com/racket/gui/blob/master/gui-lib/scribble/private/indentation.rkt
and the code that communicates with
On Sat, Jun 27, 2015 at 6:20 PM, Aidan Gauland wrote:
> On 23/06/15 00:00, Robby Findler wrote:
>> On Mon, Jun 22, 2015 at 2:43 AM, Aidan Gauland:
>>>> If this does what you want, it’s fine, but the define/contract is probably
>>>> unnecessary, and
>>&
Excited!
On Tue, Jun 23, 2015 at 10:30 AM, Neil Toronto wrote:
> On 06/22/2015 08:25 AM, Matthew Flatt wrote:
>>
>> At Thu, 21 May 2015 07:15:14 -0600, Matthew Flatt wrote:
>>>
>>> Otherwise, be prepared for me to come back in a few
>>> weeks and lobby for moving to a new macro expander.
>>
>>
>>
Yes, sorry about that everyone. Poor planning on my part.
Robby
On Monday, June 22, 2015, Neil Toronto wrote:
> Robby has just pushed an evil hack that makes plots and pict3ds
> interactive again.
>
> In the future, there will be a transition to a different "interactive
> values" API, but it'll
On Mon, Jun 22, 2015 at 2:43 AM, Aidan Gauland wrote:
>> If this does what you want, it’s fine, but the define/contract is probably
>> unnecessary, and
>> (define fish-freshness/c
>> (flat-named-contract ‘fish-freshness/c
>> (lambda (x)
>> (not (eq? ….)
>> Should do what you want.
On Sun, Jun 21, 2015 at 5:34 PM, Bahman Movaqar wrote:
> So I was experimenting with Racket 6.2, and I noted the memory indicator was
> ~216MB. I pressed the "garbage collect" button and the memory jumped up to
> ~440MB.
>
> Strange. Is it only because the memory indicator hadn't been updated
If you can't do that, here's another way approach to the problem:
#lang racket
(define my-list '("a" 1 "b" 2.5 "c" #t "d" "hi"))
(define sp (open-output-string))
(for ([k (in-list my-list)]
[v (in-list (cdr my-list))]
[i (in-naturals)])
(when (even? i)
(fprintf sp "[~a=~a]" k v))
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