, 2021 at 5:24 PM Sage Gerard wrote:
> Looks like I scoped invitation powers to group managers, not members.
> Checking on this.
>
>
> Sent from ProtonMail mobile
>
>
>
> Original Message
> On Dec 19, 2021, 4:17 PM, Nadeem Abdul Hamid < nad...
I don't have any special privileges... when I view the Google group, I
don't see a "Members" page at all and no where to invite anyone else. All I
can access is a link "My membership settings".
--- nadeem
On Sun, Dec 19, 2021 at 3:49 PM Robby Findler
wrote:
> When I follow the link at the bott
The following Scribble source:
#lang scribble/manual
@(require scribble/example teachpack/2htdp/scribblings/img-eval)
@(define guide-eval (make-img-eval)) ; from
teachpack/2htdp/scribblings/img-eval
@examples[#:eval guide-eval (make-posn (+ 1 1) (+ 2 2))]
Produces this text for the (HTML) output
Probably
(require lang/posn)
--- nadeem
On Tue, Aug 6, 2019 at 1:19 PM Kevin Forchione wrote:
> Hi guys,
> I love working with the 2htdp/universe and 2htdp/image packages. But
> polygon requires posts (and some of the other functions do too).
> 2htdp/image doesn’t include a definition. What’s t
I had a student in class the other day also complaining about sluggish
scrolling in DrRacket (while all other applications work fine), but I think
he was using 6.11 on Mac OS X.
--- nadeem
On Sun, Mar 25, 2018 at 1:20 PM, Stephen Smith
wrote:
> Hi All,
>
> I'm not sure if it just happened after
How do you control the way objects of a class are printed out in
BSL/ISL/etc.? I tried implementing the 'printable' interface but all that
shows up in BSL is
(instantiate (class ...) ...)
Here's what I tried:
;;; thingy.rkt ===
#lang racket
(provide make-thingy)
(d
I'm working on a macro that I'd like to work similar to the 'big-bang'
macro of 2htdp/universe with its various clauses, but something's going on
that I don't understand. At the bottom of this email is some code for a
very simple macro, 'calc', that is not what I'm working on, but exhibits
the puzz
Nice, thank you!
On Mon, Jul 10, 2017 at 10:56 PM, Alex Knauth wrote:
>
> On Jul 11, 2017, at 12:38 AM, Nadeem Abdul Hamid wrote:
>
> ... though a syntactic solution combining for and match would probably
>> be better.
>>
>
> Yes, please!...
> Look, python can
>
> ... though a syntactic solution combining for and match would probably
> be better.
>
Yes, please!...
Look, python can do it:
>>> [(x, z) for (x, y, z) in [(1, 2, 3), (4, 5, 6), (7, 8, 9), ('a', 'b',
'c')]]
[(1, 3), (4, 6), (7, 9), ('a', 'c')]
:-)
--
You received this message because you a
hold the values of each element; the sequence
produced by a seq-expr must return as many values for each iteration as
corresponding ids."
On Mon, Jul 10, 2017 at 9:46 PM, Jon Zeppieri wrote:
> On Mon, Jul 10, 2017 at 11:40 PM, Nadeem Abdul Hamid
> wrote:
> > Given a list o
p://docs.racket-lang.org/guide/for.html?q=multiple-valued%20sequence#%28part._.Multiple-.Valued_.Sequences%29
[2] third paragraph in http://docs.racket-lang.org/reference/pairs.html
On Mon, Jul 10, 2017 at 9:32 PM, Jon Zeppieri wrote:
> On Mon, Jul 10, 2017 at 11:02 PM, Nadeem Abdul Hamid
> wro
How come this:
(for/list ([(x y) (in-parallel '(1 2) '(3 4))]) x)
produces
'(1 2)
instead of
'(1 3)
?
Whereas,
(sequence-ref (in-parallel '(1 2) '(3 4)) 0)
produces
1
3
as I would expect, but am I doing something wrong with for/list?
In general, how might one convert a list of tuples
There might be a "Fn" or "Func" key on your keyboard (maybe along the
bottom row, near the "Ctrl", "Alt", etc. keys) that you need to hold down
as you press the F1 key; otherwise it treats the key as some Windows
shortcut.
On Mon, Jul 6, 2015 at 7:22 PM, P J Moy wrote:
> Hello. In DrRacket, when
Was there ever a resolution to this question?
On Mon, Mar 30, 2015 at 2:12 PM, Matthew Butterick wrote:
> I understand that the preamble of an XML file (e.g., a first line like
> ) is not part of the X-expression
> representing that file.
>
> That's why in `response/xexpr`, there's an option fo
-2015-03-11(-/f) [3m].
> > Language: Intermediate Student with lambda.
> > > (require racket/runtime-path)
> > > (define-runtime-path y "hello world")
> > >
>
>
>
> -- Matthias
>
>
>
>
> On Mar 18, 2015, at 9:46 AM, Nadeem Abdul Hamid w
How can I use define-runtime-path from *SL? I have a little teachpack that
exports the play-sound/play-background-sound functions so students can use
that in a game, but when you create an executable the sound files are not
packaged up. I figured that define-runtime-path needs to be used for that,
And you can use
> (number->string (exact->inexact 0.75))
to get numbers printed in decimal notation. It's slightly
distracting/annoying, but in class I can briefly explain that there is a
distinction between exact and inexact numbers in BSL, and that the former
print as rationals (fractions), and
I'm trying to create a simple sandbox evaluator (to load in programs in
*SL). I have the following code:
#lang racket
(require racket/sandbox)
(define E
(parameterize ([sandbox-path-permissions
'([write "/var/folders"]
[exists "/"]
[read
I suppose it's too late this year, but in future years, it might be good
outreach to include a Racket version of an "Hour of Code" (
http://hourofcode.org) activity. Maybe something based on WeScheme, because
all the other activities and complete online-based…
http://csedweek.org/learn
--- nadeem
nts), but the end of the root sign
> will stick out of the bounding box. It actually makes sense it stick out,
> since this makes it easy to make roots over tall characters such as h.
>
>
--
--
Nadeem Abdul Hamid
Associate Professor, Computer Science
Berry College, Mount Berry, GA 30149
instead of
>> inserting a single string-quote, possibly unless the left symbol is a
>> backslash?
>>
>> +1. I've developed a reflex to compensate for this, which is double-quote
>> double-quote double-quote delete left-arrow… which is a bit painful.
>>
>> John
>>
>>
>
--
Sent from Gmail Mobile
Nadeem Abdul Hamid
http://cs.berry.edu/nhamid
Racket Users list:
http://lists.racket-lang.org/users
> Since when is round 0.5 not giving 1?!
http://en.wikipedia.org/wiki/Rounding#Round_half_to_even
--- nadeem
Racket Users list:
http://lists.racket-lang.org/users
Some improvements to DrRacket's "automatic parentheses" mode are now
available in the nightly build version and git repository. If you have
previous tried auto-parens and abandoned it, or if you have never tried it,
please do try it now!
In auto-parens mode, typing a closing parenthesis will skip
>
> > My experience is htat when you use a mode like Nadeem is developing it is
> > impossible to write code with unbalanced parentheses unless specifically
> > desire to do so.
>
> Yes, it gets difficult to do so. But you might start with a file whose
> parenteses are unbalanced.
>
Or yank/cut/c
On Sat, Nov 24, 2012 at 12:14 PM, Grant Rettke wrote:
> On Sat, Nov 24, 2012 at 11:07 AM, Nick Shelley wrote:
>
>> I sort of like this behavior, and the visual difference gets rid of any
>> potential confusion.
>>
>
> Just an idea... you might duplicate Paredit's functionality:
>
> http://emacswi
of the users' key and/or mouse interaction) and I don't think I'm
going to go for this right now.
> On Saturday, November 24, 2012, Robby Findler wrote:
>
>> On Sat, Nov 24, 2012 at 8:53 AM, Laurent
>> wrote:
>> >
>> >
>> >
>>
On Sat, Nov 24, 2012 at 4:03 AM, Laurent wrote:
> If you can, I think it would be a good idea to remove the paren pair if
> the user deletes the opening paren he just typed by mistake. Undo should do
> the same (which apparently it does not currently; missing
> 'begin/end-edit-sequence' ?).
Yea
>
> A question: What happens when I type ) when I should type ]? E.g.
>
> (cond
> [(foo x) "one"]
> [(bar x) "two" |])
>
> where | is the cursor position on the last line there, if I type a )
> on accident, will it jump to the outer paren of the (cond ...) block?
> Will it interpret the keystro
Hello all,
I've been discussing with Robby a possible improvement of DrRacket's
"automatic parentheses" behavior and would like to get a sense of others'
general opinion about this. What follows is a description of my proposal
and then some concrete questions.
;;
The idea is to have DrRacket auto
>
> Maybe this would help, I have only used Check Syntax two or three
> times ever when I wanted to rename a variable because it was used in
> more than 5 places. What other problems does it solve?
>
>
It catches syntax errors (name typos, etc.) earlier. It allows jumping (via
the arrows) to bindin
On Wed, Nov 21, 2012 at 7:21 PM, Grant Rettke wrote:
> You are an accomplished programmer that got this far without online
> compilation that was added this year?
>
Well, I don't know about others, but prior to that becoming available, I
would often have to keep hitting the "Check syntax" button
>
> When I insert \\" in the pattern, the double quote is interpreted as the
> end of the pattern.
>
You have to escape the quote too... " ... \\\" ... "
--- nadeem
Racket Users list:
http://lists.racket-lang.org/users
subject.
>
> Any way to search across all the archives in one go?
> Thanks.
>
--
Nadeem Abdul Hamid
Associate Professor, Computer Science
Berry College, Mount Berry, GA 30149
http://cs.berry.edu/~nhamid/
Racket Users list:
http://lists.racket-lang.org/users
>> Using vanilla Dr Racket, I don't have a Script menu item until I
>> install your plugin. But then I can't access the menu at all...
>
> What do you mean? The menu is here, but you can't click on it, or the menu
> is empty?
The menu is there, but trying to click *anywhere* on the menu bar, on
an
In the "Preferences" dialog, there is a "General" tab with a slider
control that allows you to set the number of recent items displayed.
On Tue, Apr 24, 2012 at 9:20 PM, Harry Spier wrote:
> Dear list members,
>
> Is it possible to prune the DrRacket "open recent" files list.
>
> Thanks,
> Harry
On Wed, Apr 4, 2012 at 11:35 AM, Greg Hendershott
wrote:
> Sometimes I've wondered if it would help to have someone designated in
> a "product marketing" role. Even if it would be only a part-time or
> school-seasonal position.
I was thinking exactly this too this past weekend, in the context of
An alternate, quick fix is to use the Control Panel/System Preferences
to change the date on your computer to yesterday's date. Then start
DrRacket. Then, once DrRacket is running, change the date back to the
correct one.
--- nadeem
On Mon, Mar 26, 2012 at 10:11 AM, Matthias Felleisen
wrote:
>
One context where they are useful: When students in my course submit
their programs, I would like to use a program of my own to
automatically load, run, and test their programs. So I need to be able
to dynamically load their program files from my running program, and
then I want to execute and inte
Nice - this is useful to me too, thanks very much. FWIW, instead of
make-base-namespace
I had to use
make-gui-namespace
to avoid a "cannot instantiate `racket/gui/base' a second time in the
same process" error.
On Thu, Feb 9, 2012 at 10:15 PM, Robby Findler
wrote:
> On Thu, Feb 9, 2012 at 9:
provide functionality to replace what I'm
doing above.)
On Sun, Feb 5, 2012 at 11:02 AM, Nadeem Abdul Hamid wrote:
> I'm having a problem with the error "cannot instantiate
> `racket/gui/base' a second time in the same process" in a script that
> I have to perf
I'm having a problem with the error "cannot instantiate
`racket/gui/base' a second time in the same process" in a script that
I have to perform automated testing of student BSL programs. My script
requires 2htdp/image for its own purposes and uses
make-module-evaluator to create an evaluator for a
The nightly build download pages are not working - instead of controls
to select and download installers, all that appears is {{{CONTENTS}}}
and {{{VERSION}}} strings.
Racket Users list:
http://lists.racket-lang.org/users
The for form iterates by drawing an element from each sequence; if any
sequence is empty, then the iteration stops. So this:
(for ([i (in-range 2 4)]
[j (in-range 1 2)])
(printf "i = ~s j = ~s\n" i j))
produces
i = 2 j = 1
at which point, the j sequence is now empty, so the entire i
n, Nov 27, 2011 at 10:19 PM, Robby Findler
wrote:
> On Sun, Nov 27, 2011 at 8:36 PM, Nadeem Abdul Hamid wrote:
>> This used to work approximately one year ago. It was very handy for
>> students writing world/universe programs to be able to disable tests
>> with their completed
>> http://lists.racket-lang.org/listinfo/users
>>
>
>
>
> --
> sam th
> sa...@ccs.neu.edu
>
> _________
> For list-related administrative tasks:
> http://lists.racket-lang.org/listinfo/users
--
Nadeem Abdul Hamid
Associate Professor, Computer Science
Ber
italized when Caps Lock is on, instead of invoking a shortcut.
>
> I haven't reported it yet because I thought it might be an Ubuntu thing only
> - it seemed to start happening when I got 11.04 - but none of my other
> programs do it.
>
> Neil T
>
>
> On 11/23/2011
Yes, this seems to happen to me sometimes too. I just tried Cmd+N to
create a new file and it wasn't working; but it worked by selecting
the "New" menu item. It seems to maybe have something to do with
switching desktop "spaces" - because after doing that, the Cmd+N
shortcut doesn't work, reliably.
I'm trying to create a planet archive and am getting the error below.
Any ideas on what might be wrong? Thanks,
--- nadeem
$ raco planet create /...path.../racketui/
Building: scribblings/racketui.scrbl
PLaneT packager: Error generating scribble documentation:
declare-exporting: not a module pat
Is there a convenient way to get a list of the color names in
the-color-database (in racket/draw)? I see the 'colors' hash table
defined in collects/racket/draw/private/color.rkt but don't see any
way to access it to extract the key values.
Thanks,
--- nadeem
__
One other suggestion/request for the automatic parens feature: Can it
be set up so that it skips over the closing paren if the user types
')' while the cursor is right in front of the automatically-inserted
')' ?
I don't know about paredit but Eclipse does this with parens and
various types of bra
at 9:25 PM, Carl Eastlund wrote:
> On Sat, Sep 24, 2011 at 9:19 PM, Nadeem Abdul Hamid wrote:
>> I'm not sure if there's something I'm missing, but I'm trying to write
>> a script that writes to a subprocess' stdin and then reads its stdout.
>> T
I'm not sure if there's something I'm missing, but I'm trying to write
a script that writes to a subprocess' stdin and then reads its stdout.
The program being executed (via 'subprocess') is this C program:
/* test.c */
#include
int main() {
int d;
printf("Hello World!");
scanf("%d", &d);
Try putting (test) at the very bottom of the file in which you have
your check-expect's.
On Sun, Sep 18, 2011 at 8:21 PM, Luke Vilnis wrote:
> Hi everybody,
> I was wondering how to get test-engine working with #lang, or non-student
> languages in general. I tried something like this:
> #lang rac
Do you have some examples? Concrete examples of possible input values
and what you expect the corresponding output to look like? And if the
function expects integers as input, then what is the difference in the
output between two successive input values like 2 and 3? 4 and 5? 0
and 1?
On Sat, Sep
On Wed, Sep 7, 2011 at 1:40 AM, Veer wrote:
> If my link tag is
>
> Then browser does not find index.css , but when my link tag is
> If it is :
>
> Then browser is able to apply the index.css .
>
> I am not too sure why is it so.
>
If you look at the URL that your servlet runs from, by default
me. But I think it also happened on
a binary version I downloaded yesterday for Windows. I'll try getting the
latest and see if it makes a difference. The language is just 'racket'.
Thanks,
--- nadeem
> At Wed, 20 Jul 2011 18:02:15 -0400, Nadeem Abdul Hamid wrote:
> > I
Seems like you need at least one newline at the end of the file -- put an
empty line or two after your printf("Hello") and then it should work.
On Wed, Jul 20, 2011 at 6:30 PM, Grant Rettke wrote:
> On Wed, Jul 20, 2011 at 4:10 PM, Greg Hendershott
> wrote:
> >> define factorial(n)
> >> if {n
I've posted my first planet package, but I'm getting some weird error in
building documentation when installing it from DrRacket, which doesn't occur
at all when I install using 'planet install ...' at the command line. Any
ideas what is going wrong? Is there something that I might be missing in my
OK, never mind the last two questions: I figured out (require (planet
a/b/c)) is equivalent to the form (require (planet "c" ("a" "b" ...)), and
the planet dev links do work with BSL, etc.
On Mon, Jul 18, 2011 at 9:36 AM, Nadeem Abdul Hamid wrote:
>
> I
Is it the case that '(require (planet ...))' in the student languages
(BSL...) doesn't work with planet dev links?
And is the equivalent of a normal racket statement:
(require (planet a/b/c))
this in the student languages:
(require (planet "a" ("b" "c" 1 0)))
?
--- nadeem
_
Am I missing something, or is this a bug?
The following works as expected:
Welcome to DrRacket, version 5.1.2.3--2011-07-13(41b66d3/a) [3m].
Language: racket; memory limit: 128 MB.
> (module yup racket
(struct a (x y) #:transparent)
(struct b a (z) #:transparent)
(provide (struct-out a
On Sat, Jul 16, 2011 at 12:34 AM, Mark Engelberg
wrote:
>
> Because the image is not only dependent upon the current location of
> the sprite, but also the entire history of the sprite's movements when
> its pen was down. So you either have to store a very long list of
> line segments in the worl
On Fri, Jul 15, 2011 at 2:56 PM, Stephen Bloch wrote:
> The problem is that some sprite actions (most obviously, "move" when you're
> in pen-down mode) affect not only the sprite itself but the world's picture.
> So far the least-bad solution I've come up with is to hide a mutation of
> that pic
It means it "doesn't return". Note that the last thing the function
does is call send/suspend/dispatch, which calls response-generator,
and never "returns" back out of the original call to render-blog-page.
--- nadeem
On Mon, Jun 13, 2011 at 5:13 PM, Rodolfo Carvalho wrote:
>
> Hi,
> I'm reading
I'm struggling with figuring out how to work with ~or patterns and
syntax/parse. Suppose, for example, I want to write a macro that takes
any number of either single numbers or pairs of numbers. It should
expand into a list of results where each single number is negated and
each pair is summed toge
On Wed, May 11, 2011 at 3:45 PM, David Van Horn wrote:
> Is there a good way to do a functional struct updates with subtypes of a
> structure?
There was some discussion about it a while ago in reference to
struct-copy. The documentation has been updated with some useful
examples, including usage
On Wed, Apr 27, 2011 at 11:25 PM, Carl Eastlund wrote:
> Modules currently can't define syntax for syntax. However, you can
> use define-syntax-set from mzlib/etc to define multiple macros at once
> that share local bindings, such as syntax classes. Since they're
> lexical bindings rather than m
On Wed, Apr 27, 2011 at 10:47 PM, Sam Tobin-Hochstadt wrote:
>> If I move the syntax class
>> definition into the bodies of define-syntax, then it works, but that
>> defeats the purpose of being able to define a reusable syntax class...
>
> You'll need to move the syntax class definition into a se
What am I missing in the code below (reproduced from the "Fortifying
Macros" paper)? When run, this gives me an error: "syntax-parse: not
defined as syntax class in: binding". If I move the syntax class
definition into the bodies of define-syntax, then it works, but that
defeats the purpose of bein
Try something like this, with a dummy value for the checked attribute:
`(div (input [(type "radio") (name "n-4-answer") (value "2") (checked "yes")]))
On Wed, Apr 27, 2011 at 6:11 PM, J G Cho wrote:
> I am trying to print:
> the egg
>
> The closest I can come up is:
> value="2">checkedthe egg
>
On Wed, Apr 20, 2011 at 1:03 PM, J G Cho wrote:
> 3. One more. This observation regards Dr Racket.
> Sometimes I cannot type [ or ]. It becomes ( or ).
>
> First I thought my machine was acting up. But I noticed that I can
> type 'cond([' fine. So I am thinking its the Dr who is 'helping me
> too
Store the functions go-1, go-2, etc. in whatever is produced by "e"?
Such that you can do:
((func-of e) s)
--- nadeem
2011/4/4 José Lopes :
> I have a function which, at the moment, is performing manual dispatch:
>
> (cond ((something1? e) (go-1 s))
> ((something2? e) (go-2 s
iate instance of id" is meant to suggest that it
> doesn't have the extended fields.
>
> What would you have written?
>
> Robby
>
> On Fri, Mar 25, 2011 at 10:04 AM, Nadeem Abdul Hamid wrote:
>> In that case, the documentation should probably be updated clearly t
Mar 25, 2011 at 7:52 AM, Pierpaolo Bernardi
> wrote:
>> On Wed, Mar 23, 2011 at 00:49, Nadeem Abdul Hamid wrote:
>>> Is there anything like struct-copy that works to functionally update a
>>> field value in a structure, where the field happens to be defined in
>>
Is there anything like struct-copy that works to functionally update a
field value in a structure, where the field happens to be defined in
the super-type? In the example below, I want to "functionally update"
a field of the sub structure inherited from the base definition...
(struct base (a b) #
; (define mp (connect-to-server "pop.gmail.com" 995))
>
> And after thirty or so seconds, I receive the following error
>
> regexp-match: expects type as 2nd
> argument, given: #; other arguments were: #rx"^\\+OK(.*)"
>
> Any ideas?
>
>
I think something like this has come up before but I can't find the
thread. Given:
(define A%
(class object% (inspect #f) (super-new)))
(define/contract B%
(class/c )
(class object% (inspect #f) (super-new)))
How can I get around the problem that:
(equal? (new A%) (new A%))
but
(not
C 93
>
> _
> For list-related administrative tasks:
> http://...
>
> _
> For list-related administrative tasks:
> http://lists.racket-lang.org/listinfo/users
>
> _
Please don't post solutions to problems on the public mailing list. I
just assigned this problem to my students this past week and it's
rather annoying to have the solution easily available on the public
group page!
Thanks,
--- nadeem
On Tue, Nov 2, 2010 at 11:57 AM, Sam Griff wrote:
> Here is my
On Sat, Oct 9, 2010 at 6:12 PM, Jay McCarthy wrote:
> The next release has support for almost all the form elements:
>
> http://github.com/plt/racket/blob/master/collects/web-server/formlets/input.rkt
>
The select-input and multiselect-input formlets don't seem to have an
#:attributes parameter,
I don't think it should be that difficult once you get an evaluator
set up. I've done something like what you want, taking some ideas from
the handin server code. What I came up with (no fancy macros) is you
define a test specification for an assignment like this (in a #lang
racket file):
Oh yeah, duh.
On Thu, Oct 14, 2010 at 12:48 PM, Matthias Felleisen
wrote:
>
> Because (require racket) provides everything you'd ever want.
>
>
> On Oct 14, 2010, at 12:39 PM, Nadeem Abdul Hamid wrote:
>
>>> Thanks for setting my head straight!
>>
other
> with
> hash tables and fancy algorithmics until you know you need it -- by measuring.
>
> I used to believe this but have temporarily forgotten this lesson due to
> external influences.
>
> -- Matthias
>
>
>
>
> On Oct 14, 2010, at 12:09 PM, Nadeem Abdu
d)))
>
> (check-expect (collect '(123 124 125 126 23 24 31))
> (list (cons 1 4) (cons 2 2) (cons 3 1)))
>
>
> If actual I/O is required, I'd use batch-io to read CSV files and
> display the list above in a batch action.
> _________
e code file, it doesn't happen.
--- nadeem
On Tue, Oct 5, 2010 at 1:35 PM, John Clements wrote:
>
> On Oct 2, 2010, at 7:20 AM, Matthias Felleisen wrote:
>
>>
>> On Oct 2, 2010, at 8:23 AM, Robby Findler wrote:
>>
>>> On Fri, Oct 1, 2010 at 10:29 PM, Nadee
2, 2010 at 9:20 AM, Matthias Felleisen
> wrote:
>>
>> On Oct 2, 2010, at 8:23 AM, Robby Findler wrote:
>>
>>> On Fri, Oct 1, 2010 at 10:29 PM, Nadeem Abdul Hamid wrote:
>>>> Do other people experience these things?...
>>>>
>>>> Why i
Do other people experience these things?...
Why is it that sometimes when I open a *.rkt file with #lang racket
at the top, the "check syntax" "debug" "macro stepper" buttons don't
appear unless I go that top #lang line and edit it -- delete the "t"
of "racket" and retype it, for instance?
Anoth
_
> For list-related administrative tasks:
> http://lists.racket-lang.org/listinfo/users
>
--
Nadeem Abdul Hamid
Associate Professor, Computer Science
Berry College
PO Box 5014
2277 Martha Berry Hwy N
No, I don't think it will be a problem. I have it installed on my
64-bit laptop and it works fine.
--- nadeem
On Sun, Sep 19, 2010 at 11:21 AM, Ellis Lee wrote:
> Hello,
>
> I just wanted to ask if it's all right to download and install DrRacket
> Windows x86
> on my Windows 7 64-bit laptop des
Suppose I have these definitions in a BSL file:
(define-struct fighter (desig accel speed range))
(define fighter1 (make-fighter "F22" 75 200 350))
Now, in a separate 'teachpack' (written in #lang racket), I have an
exported function that processes the 'fighter1' value. But why does
struct->ve
Yes, it looks to me like it works fine now. I used yesterdays' nightly
build: version 5.0.1.5--2010-09-09, on Windows XP.
--- nadeem
On Fri, Sep 10, 2010 at 6:22 PM, Robby Findler
wrote:
> I believe this has been fixed in the latest GIT version. If someone
> has the opportunity and interest to ve
By default, struct defines an "opaque" structure. You can do something
like this:
> (struct posn (x y) #:transparent)
> (struct? (posn 3 4))
#t
See the documentation for struct in the reference.
HTH,
--- nadeem
On Sun, Sep 5, 2010 at 10:05 PM, 趙Frodo wrote:
> I don't know if I did something
>
> I would like to pre-fill the VAT Rate input-string with a rate (set to 17.5
> as a
> default). Is there a way I can do that?
>
You probably have to define your own formlet, e.g.:
(define init-input-string (λ(val)
(to-string
ize ([sandbox-coverage-enabled #t])
(make-evaluator 'racket
(port->bytes inp)
)
(get-uncovered-expressions Ev)
Thanks for the help,
--- nadeem
On Wed, Jul 21, 2010 at 6:39 PM, Nadeem Abdul Hamid wrote:
>> I can't pr
"(define (f x)
(if (zero? x) \"zero\" \"non-zero\"))
(f 4)")
)))
(get-uncovered-expressions Ev)
--- nadeem
On Jul 21, 2010, at 6:19 PM, Eli Barzilay wrote:
> On Jul 21, Nadeem Abdul Hamid wrote:
&g
Sorry if I am missing something obvious, by why does the following produce '() ?
(define Ev
(parameterize ([sandbox-coverage-enabled #t])
(make-evaluator 'lang/htdp-intermediate
`(define (f x)
(if (zero? x) "zero" "non-zero"))
`(
gt;
> (FWIW, this is 4.2.3.9svn4jan2010; perhaps an update would help?)
>
> John
>
>
> _
> For list-related administrative tasks:
> http://list.cs.brown.edu/mailman/listinfo/plt-scheme
>
>
--
Nadeem Abdul Hamid
Assistant Pr
Running the extended example in this section:
http://docs.racket-lang.org/web-server/servlet.html?q=box#(part._web-cells)
gives me:
exception: continuation application: attempt to cross a continuation barrier
What is wrong?
--- nadeem
_
For l
> See
> http://blog.racket-lang.org/2009/03/drscheme-repl-isnt-lisp.html
> for a detailed answer.
>
I see what the blog post above is saying, but (I know, "no when no if no but"),
has anyone ever used editors for some of the proof assistants, like CoqIDE or
ProofGeneral mode in Emacs for Coq? T
A couple of questions regarding quitting web apps,
1. I start up a servlet so:
(serve/servlet my-dispatch #:quit? #t ...)
Now, how come if I use a program like curl/wget to access the "/quit" URL,
the server doesn't shut down, but accessing the same URL via a web browser
does? Here's the t
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