))
Should that first flush-output be on p?
Thanks, in advance, for your help with this.
Regards,
Tim
--
Tim Brown CEng MBCS tim.br...@cityc.co.uk
City Computing Limited · www.cityc.co.uk
City House
Matthew,
Thanks for the pointers.
On 20/03/15 11:52, Matthew Flatt wrote:
At Fri, 20 Mar 2015 10:14:12 +, Tim Brown wrote:
I have written a remote-server (as in
racket/place/define-remote-server), which I am then trying to use from a
web-server. The remote-server is running on a remote
of it is here: https://gist.github.com/tim-brown/87b05c16f41aa86a1421
Am I missing something fundamental here?
Can I (require data/bit-vector) in a different way or something like that?
Am I better off hand-rolling this?
I would like to use bit-vectors for things like cellular automata
) is, at the very
least, inconvenient.
Tim
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the vector (of bits or bytes);
and I would guess it requires O(N²) reads.
The performance for a simple PRIME sieve (which doesn't do that much
reading, -- O(N), vs. O(N²)) is illustrated with:
https://gist.github.com/tim-brown/789239fa40c734d512e4
cpu time: 1429 real time: 1431 gc time: 0
cpu time: 24 real
FYI: Welcome to DrRacket, version 6.0 [3m].
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you get to problem #100, your head will hurt (but in a fun
kind of way) :-)
It's well worth checking out the math/number-theory module; there is a
*lot* of cool stuff in there. Only big omission I have found for PE is
that there is no way to prepare a cache of primes.
Regards,
-joe
Tim
--
Tim
style (I see plenty of scope for inner
defines and matches and the likes); but it works for me.
I've just committed a tested, but poorly documented version to GitHub:
https://github.com/tim-brown/place-farm
YMMV (a lot).
Tim
PS Please could you try to obfuscate your PE solutions if you post them
. Something along the
lines of:
...
raco setup: post-installing: racket/gui
raco setup:
raco setup: ERROR SUMMARY:
raco setup: error: during making for contract-profile
...
It'll stop me (at least) from thinking that it has all gone horribly wrong.
Tim
--
Tim Brown tim.br...@cityc.co.uk | City
700 Tasks have now been implemented on Rosetta Code.
Remaining at #2, and pulling away from Python.
Now only 46 behind TCL!
Good going folks,
Tim
https://plus.google.com/104522910766067522260/posts/fTxSDnoQDQM
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sandboxes don't play nice with symlinks on purpose. Apache
HTTPD, for example, looks upon them with deep suspicion.
Is there any merit to this kind of paranoia when it comes to racket?
Tim
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T: +44 20 8770 2110
According to: http://www.timb.net/popular-languages.html:
Racket has now taken the second slot in the most popular languages on
Rosetta Code (http://rosettacode.org).
Well done contributors.
Yay!
Tim
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totally lazy!) while still in draft.
-- Dan
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://lists.racket-lang.org/users
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Eli, Matthias, thanks to both of you for your comments on this code (for
whose creation I am responsible / to blame). I hope I'm not too out of
order addressing your responses together in this one email.
I thought I was doing pretty well when I changed the original style to
struct item from a
On 09/06/13 18:54, Matthias Felleisen wrote:
(define item (first items))
(define weight (item-weight item))
(define volume (item-volume item))
(define value (item-value item))
Now I understand that the three lines of extracting the content of the
first struct are
On 10/06/13 14:08, Matthias Felleisen wrote:
Thanks for the reply.
On Jun 10, 2013, at 8:20 AM, Tim Brown wrote:
Am I missing a trick?
Why not struct-copy:
Why not? Because I couldn't see it in the documentation for looking!
Seriously, it's really useful having that pointed out. Thanks
On 10 Jun 2013 19:03, Asumu Takikawa as...@ccs.neu.edu wrote:
I wonder if that's not at least partly due to syntax coloring.
I'm still on their case!
Cheers,
Asumu
Tim
Racket Users list:
http://lists.racket-lang.org/users
promotion, may I suggest that you follow this G+ thread:
https://plus.google.com/104522910766067522260/posts/LMMssYHAVpx
Tim
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Projects Wiki page to this effect; I hope
nobody objects.
FYI racket.php can be found at
https://github.com/tim-brown/geshi-racket/blob/master/racket.php
and you can put it into your GeSHi syntaxes directory if you want to use/
test it.
Tim
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Barzilay e...@barzilay.org wrote:
40 minutes ago, Tim Brown wrote:
I've just installed 5.3.4 for windows 64 bit. I've ended up with a
GRacket icon in my start menu, whereas I'd rather expect a DrRacket.
I think that Windows 7 uses some obscure guess about programs that it
shows you
Folks,
I've just installed 5.3.4 for windows 64 bit. I've ended up with a GRacket
icon in my start menu,
whereas I'd rather expect a DrRacket.
DrRacket is installed and running lovely from the Programs menu.
But it's at least one (if not two) more clicks away!
Tim
--
| Tim Brown tim.br
Back on the subject of right menu fragility...
I ran a drracket up in an Xnest server. No window manager nor desktop
environment.
Fragility still there. The more exciting stuff I did (selection, allowing
arrows to appear with their respective n bindings popups) the more
fragile. But still
On 24 Apr 2013 10:42, Shannon Severance s...@s53.me wrote:
(define sqrt-n (inexact-exact (ceiling(sqrt n
Racket has integer-sqrt, which saves you defining sqrt-n every time.
Also worth noting is sqr, which covers the occasions you want (* x x) or
(expt x 2)
Customer testimonial:
I
Neil wrote, then my stupid phone over-edited:
By the way, Racket has been used very successfully in Web CGI and SCGI
for a decade.
Not according to wikipedia it doesn't! ;-)
I just looked (which is about all this device is any good for). And racket
is neither a language with an SCGI API nor a
As an aside, I changed from GNOME to KDE as my Desktop Environment --
I seem to have better luck* with the right menus on the latter. Don't
know if handles menu/transient windows differently.
* where luck is measure of apparent stability of the right menus. Although
it doesn't seem to work any
Folks,
I've just uploaded an (AFICT) working script to build racket on for
PowerPC.
https://github.com/tim-brown/racket-powerpc-cross
I have racket running on a small embedded P1021 device. From a 300MB NFS
installation! It runs small scripts, and has proven a neat little (ahem!)
tool.
I have
Folks,
I've just committed a first release of a GeSHi plugin for racket.
I believe that I can get it merged into GeSHi via the Rosetta Code
folks; it'll be nice to have racket highlighting in Media Wiki
(especially after Asumu's call to arms with R.C.)!
https://github.com/tim-brown/geshi
On 29/03/2013 03:03, Matthew Flatt wrote:
Let's fix the docs. My current attempt is
The grammar in the docs may not be wrong. I re-read it, in conjunction
with the preamble on Reading Numbers. Although, strictly, it is
correct and covers all cases, it is (IMHO) quite hard to read. I wonder
Matthew,
On 29 Mar 2013 03:03, Matthew Flatt mfl...@cs.utah.edu wrote:
FWIW, there are number-parsing regexp constructions in
collects/r6rs/private/readtable.rkt (see `rx:number')
[...]
The first, as the path suggests, is R6RS instead of Racket.
I've just looked at the R6RS regexps.
can use, I'd be interested.
Or I could stick with [0-9]+
Tim Brown
The regex... should work with everything but: 2+3i
#b)(#e)|(#i)))-)|(\+)))?)((([0-9]+)(\\/)([0-9]+)(((-)|(\+)))((([0-9]+)(\\/)([0-9]+)))(i)))|((-)|(\+)))?)((([0-9]+)(\\/)([0-9]+)|((-)|(\+)))?)([0
to see if there's a more
Rackety way of doing it.
Tim Brown
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for the Right
Thing, namely that Racket is a separate language.
On Mon, Feb 18, 2013 at 4:27 PM, Asumu Takikawa as...@ccs.neu.edu
mailto:as...@ccs.neu.edu wrote:
On 2013-02-18 12:47:21 +, Tim Brown wrote:
I've just had a poke around and seen that Racket is considered
when building
the LaTeX? (I _do_ see how a footnote wouldn't be a appropriate for HTML
rendering).
Tim
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I noticed on the intro project list for racket is a task to provide some
rosetta code examples.
https://github.com/plt/racket/wiki/Intro-Projects
I've just had a poke around and seen that Racket is considered a dialect of
scheme, and there are many tasks that have the scheme entry marked as
On 01/02/13 13:13, Matthias Felleisen wrote:
Actually what does it mean to access syntactic extensions at run-time?
Just a thought, but is there a case for pulling the syntaxes into a
run-time test suite (raco test, or even the GUI tester?) and testing
them there... e.g. do they transform a
On 01/02/13 14:39, Tim Brown wrote:
(define/test (add-four a) (check-= (add-four 2) 6 0) (+ 4 a))
This won't compile; I can't get off the starting line.
However, it *does* go all golden-background in DrRacket, which explains to
me that there's a syntax error (and DrRacket doesn't blow up
Ryan,
Thanks for the pointers.
On 01/02/13 15:44, Ryan Culpepper wrote:
On 02/01/2013 09:39 AM, Tim Brown wrote:
I have an outstanding question about unit-testing syntactic extensions
from a couple of weeks ago. What do the heavier users of syntaxes use to
unit test their macros?
Either
I don't seem to be able to post to this list.
This mail is to test this address. Sorry for
the inconvenience.
Tim
Racket Users list:
http://lists.racket-lang.org/users
Resend... original (and previous resend!) sent from an address not
valid for the list.
-- Forwarded message --
From: Tim Brown tim.br...@timb.net
Date: 30 January 2013 10:01
Subject: Re: [racket] How to invoke a blocking foreign function
without blocking whole racket?
To: Haiwei
There are internal FFI calls: scheme_make_fd_input_port and
scheme_make_fd_output_port, documented in
http://docs.racket-lang.org/inside/Ports_and_the_Filesystem.html?q=to%20port#(idx._(gentag._480._(lib._scribblings/inside/inside..scrbl)))
If you would normally be able to poll (or select) from
of
programs:
When running the program, all of the chunk expressions are collected and
stitched together into a program
What is the situation here?
Regards,
Tim
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On 26 Jan 2013 15:44, Matthias Felleisen matth...@ccs.neu.edu wrote:
We don't quite understand what exactly you mean. We believe you have a
related work section in mind. Perhaps it would be best to mock up a
few pages from the documentation so that we can see what exactly you have
in mind.
there are certain spacial
problems that are more appropriately solved using Prolog. It might be
worth raising a question over there, too. [Nobody's done anything with
datalog have they?]
Tim
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.
Tim
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using that,
but to no avail.
Tim
On 25/01/13 17:13, Tim Brown wrote:
On 25/01/13 17:04, Matthew Flatt wrote:
I wasn't able to replicate the error that you get, but I notice that
your C code doesn't cooperate with the GC.
I'm following the recipe in 1.5.1 CGC Embedding in
http://docs.racket
On 25 Jan 2013 18:27, Matthew Flatt mfl...@cs.utah.edu wrote:
So, I think the bug was the same one that shows up with `raco exe' and
`match' in v5.3.1, and that bug has been fixed for the upcoming
release.
Hurrah for just too late big reporting!
As an aside, would you expect 'raco --cgc' to
/iatm-MQ/wm_mq_iatm8/src/test-match-expander/main.rkt:23:15
4)
scheme_namespace_require test-match-expander
main: 42
That covers my 2^2 test cases!
Am I doing anything fundmentally dim here?
Tim Brown
Environments:
LINUX:
$ racketcgc
Welcome to Racket v5.3.1 [cgc].
(system-library-subpath
On 20/01/13 22:26, Matthias Felleisen wrote:
On Jan 20, 2013, at 6:35 AM, Tim Brown wrote:
On Jan 18, 2013, at 12:36 PM, Tim Brown wrote:
A concrete example is that I am trying to write a #lang language.
Honestly, I would never ever try to write a #lang first.
That's more than most people
.
But, if this sounds properly useful to anyone (I'm not sure if racket needs
*more* choice in testing/contracting/typing environments), giz a shout.
Tim
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, but I won't [because they
don't, really].
Anyway, I say luck rather than judgement, since I used no recipe for
development and testing rather than write code, scream when it doesn't
work. So I am most grateful for this framework.
On 19/01/2013 19:01, Tim Brown wrote:
Excuse me everyone, I'm
On 01/19/2013 06:31 PM, Matthias Felleisen wrote:
[quoting depth out by one]
On Jan 18, 2013, at 12:36 PM, Tim Brown wrote:
Here is one way to justify this answer. You really may wish to
make define/test orthogonal to which testing framework you use:
-- rackunit
-- test engine
-- the Eli
how
to do better with this aspect of Racket, which is by far its most
innovative part and unrivaled in the world of PLs.
On Jan 18, 2013, at 12:36 PM, Tim Brown wrote:
On 18/01/13 15:54, Matthias Felleisen wrote:
Is there a single stumbling block or do you feel overwhelmed by
the broad API
*so reasonable*... but everything anyone writes about macros
sounds *so reasonable*. Until I put the page down!
I feel like one of those Zen disciples who just doesn't get it.
But quite often they do. After a while. So I'm keeping up hope.
Tim
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'
Which returns me 0
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?
I don't really want to be doing things like:
---
blah blah blah
@(define f woo
)@f @f @f
---
Tim
[tim-brown on #racket, if you want to poke me there]
--
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.
If you've any pointers, I'd be grateful.
Tim
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On 26/09/12 15:31, Marco Morazan wrote:
1. Is eq? the most natural way to test the equality of numbers? (minor quibble)
I was wondering this, myself, earlier, but is zero? the fastest way to
test for zero-ness?
Tim
--
Tim Brown tim.br...@cityc.co.uk | City Computing Limited|
T
irrelevant for this question.
Correct is what really matters.
On Sep 27, 2012, at 11:45 AM, Tim Brown wrote:
On 26/09/12 15:31, Marco Morazan wrote:
1. Is eq? the most natural way to test the equality of numbers? (minor quibble)
I was wondering this, myself, earlier, but is zero? the fastest
to 1,000,000 cannot be reproduced with
set-range, and cannot have a value set to it. Is this inconsistency a bug?
Or is there some intention behind it?
Tim
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and paper than user racket. Let's change that.
Tim
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of (in-cycle)?
Or should (in-value) be documented as cannot be initiated afresh?
Regards.
Tim
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Matthew Flatt wrote:
At Mon, 16 Jul 2012 17:33:23 +0100, Tim Brown wrote:
In any case, I will need to invisibleise the pointer when it is no
longer in use by racket (i.e. legitimately collectable). What would be
the best way/hook to detect the pointers' end-of-life?
Probably `register
this reference
kept visible?
Regards,
Tim
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life simpler)
In any case, I will need to invisibleise the pointer when it is no
longer in use by racket (i.e. legitimately collectable). What would be
the best way/hook to detect the pointers' end-of-life?
Regards,
Tim
--
Tim Brown tim.br...@cityc.co.uk | City Computing Limited|
T
for the situation!
In other news, from what I see on Google, a Rackaholic seems to be some
kind of 4x4 Driving, Deer Shooting, Barbecue addict. Living one
interpretation of the American Dream, maybe, but probably not interested
in the hygiene of their macros (or maybe hygiene at all).
Tim
--
Tim Brown tim.br
Folks,
Are there any racket (or scheme) social groups in London,
Surrey or the South East of England?
Tim
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it be handled though?
Tim
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Matthew Flatt wrote:
This sounds like an `--enable-shared' and libtool issue. Maybe we need
to upgrade some libtool files?
Do you import libtool into the racket source tree, thereby freezing
the version and needing maunal update?
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of the CGC's
isn't it)?
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Matthew Flatt wrote:
No, I think we still rely on Racket-specific changes to the Boehm GC,
but revisiting that is on my list of things to do one day.
Do you have a published LOTTDOD?
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Matt,
Just saw you commit: configure: use installed `libtool' by default
Did you look to see whether up-to-date libtool handles the
LD_LIBRARY_PATH_nn variables?
Tim
Matthew Flatt wrote:
Maybe the default these days should be to use an installed `libtool' if
one is available?
--
Tim Brown
condition and then arbitrary forms -- but I didn't really want to see:
#:when (when ( ...) print flush)
It's just odd.
Hope that hasn't exposed you too much to the darker corners of my thinking,
but you did ask!
Tim
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))
(and (right-triangle? a b c) (list a b c
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?
(Happy to accept that as an option)
Otherwise... what's up? Can I do owt to help?
tim-brown on #racket, ping me if you need to know more
Tim Brown
(gdb) where
#0 0x7f78f77a90e3 in select () from /lib/libc.so.6
#1 0x7f78f84d59dc in default_sleep (v=value optimized out,
fds
().
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---|
BEAUTY
-layer wrappers.
Is there a CFFI - racket FFI conversion floating about in the world of
men?
All the best,
Norman
To you too.
Tim
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/native/x86_64-linux/3m/xxx_rkt.so
Everything is xxx!
What have I missed?
Help much appreciated.
Racket 5.2 (downloaded from website today) 3m linux x86_64
Thanks,
Tim
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' is defined as a type by some header and
xform.rkt can't deal with the collision.
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On 24/05/11 03:28, Matthew Flatt wrote:
At Mon, 23 May 2011 12:52:12 +0100, Tim Brown wrote:
Solaris seems to take quite a dim view of flock(); from man flock():
That's nothing compared to the dim view of F_SETLK in the BSD world.
Ooh... this sounds like it could get religious!
From
solution, then that would
be appreciated.
Reagrds,
Tim
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-- only building on this a.t.m.
configure: ../configure --srcdir=.. --prefix=/usr/local CC=gcc CXX=g++
(I'm using a target-specific build directory)
gcc: gcc (GCC) 3.4.3 (csl-sol210-3_4-branch+sol_rpath)
Regards,
Tim
--
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On 23/05/11 13:04, Tim Brown wrote:
racket: racket-5.1.1-src-unix.tgz -- only building on this a.t.m.
Checked... seems not to be a problem on 5.1.
Tim
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something horribly wrong (again).
Regards,
Tim
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):
---
1 First Section
2 Second Section
Check out section 1 for more info!
5.1
---
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-listener? to be
and evt? ?
Can you ever put too many question marks in one email?
Regards,
Tim
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be with toc ...
Suggestions please.
Thanks,
Tim
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2010 09:49:02 +, Tim Brown wrote:
Hello,
I'm trying to 'scribble' a simple HTML document, but without the TOC
sidebar. Is there a simple way to make the top level part (i.e. my
document have the 'no-toc style)?
I really want to be able to have:
#lang scribble/doc
@(some no-toc magic
)
(lambda () 3))) - '(1 2 3)
Is there a standard name for the (lambda (x) (x)) in racket?
Or do I have to write my own (define (call x) (x))?
Tim
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checked the FFI (which is the main reason I need the 64-bit build),
and it works (for getenv(), anyway).
I can now apply scheme, er, racket to our existent C applications.
Truly, this is very exciting.
Thanks again,
Tim
--
Tim Brown tim.br...@cityc.co.uk | City Computing Limited|
T: +44
you've written, this behaviour seems to be what you would
expect.
Is there anything I can do to intercept `racketcgc' before it calls
whatever it calls to throw this error?
Regards,
Tim
--
Tim Brown tim.br...@cityc.co.uk | City Computing Limited|
T: +44 20 8770 2110
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