On Mon, 12 Aug 2013 14:50:43 +0100
Claude Heiland-Allen cla...@mathr.co.uk wrote:
Hi Brian,
On 12/08/13 03:52, bri...@aracnet.com wrote:
...
Couldn't match expected type
...
Gtk.on Gtk.exposeEvent glCanvas $ \ _ - putStrLn foo
...
I looked up the type of Gtk.on and
after getting the entry widget events to work as i wanted, i started looking at
some other things to do, and my first attempt failed with this :
Couldn't match expected type `Gtk.Signal
(Gtk.Signal self0 (Gtk.EventM Gtk.EExpose
Bool)) (t0 - IO ())'
On Sat, 27 Jul 2013 15:44:44 +0100
Claude Heiland-Allen cla...@mathr.co.uk wrote:
Perhaps it's a terminology confusion: in GTK, activate for an entry
means pressing return key. This program works fine for me, pressing
return prints the text I entered in the box:
8
import
Hello all,
This should be simple, and I thought it had it working, but I've broken it and
can't figure out why.
What I want is to invoke the callback whenever the user activates and entry in
a dialogbox, so I did both this :
Gtk.on entry Gtk.entryActivate (boxHandler entry)
(I believe this
This,
wireframe :: Double - Double - Double - IO ()
wireframe wx wy wz = do
-- yz plane
renderPrimitive LineLoop $ do
vertex $ Vertex3 0.0 0.0 0.0
vertex $ Vertex3 0.0 wy 0.0
vertex $ Vertex3 0.0 wy wz
On Sun, 16 Jun 2013 16:15:25 -0400
Brandon Allbery allber...@gmail.com wrote:
On Sun, Jun 16, 2013 at 4:03 PM, bri...@aracnet.com wrote:
Changing the declaration to GLdouble - GLdouble - GLdouble - IO() and
using
(0.0::GLdouble) fixes it, and I'm not clear on why it's not automagic.
On Sun, 16 Jun 2013 22:19:22 +0100
Tom Ellis tom-lists-haskell-cafe-2...@jaguarpaw.co.uk wrote:
On Sun, Jun 16, 2013 at 01:03:48PM -0700, bri...@aracnet.com wrote:
wireframe :: Double - Double - Double - IO ()
wireframe wx wy wz = do
-- yz plane
renderPrimitive LineLoop $ do
On Mon, 03 Jun 2013 19:16:08 +
silvio silvio.fris...@gmail.com wrote:
Hi everyone,
Every time I want to use an array in Haskell, I find myself having to
look up in the doc how they are used, which exactly are the modules I
have to import ... and I am a bit tired of staring at type
On Mon, 3 Jun 2013 23:19:38 -0400
Clark Gaebel cgae...@uwaterloo.ca wrote:
That's absolutely true. Wrappers around vector for your multidimensional
access is probably best, but Vectors of Vectors are usually easier.
But again, you're right. Multidimensional access is a pain. If it's a
On Mon, 4 Mar 2013 20:39:43 +0100
Łukasz Dąbek sznu...@gmail.com wrote:
Thank you for your help! This solved my performance problem :)
do you have a link to the new code ?
it should be very instructive to see the differences.
Brian
___
On Sun, 3 Mar 2013 19:58:37 -0500
Brent Yorgey byor...@seas.upenn.edu wrote:
Good access to fonts and font metrics is the kicker. Otherwise I'd
say to switch to using diagrams as a backend, hence getting a whole
bunch of actual backends for free. I would love to see development of
some
Hi all,
I was creating bigger uncurries which I am simply extending from an existing
uncurry I found some where, e.g.
uncurry4 :: (a - b - c - d - e) - ((a, b, c, d) - e)
uncurry4 f ~(a,b,c,d) = f a b c d
when I realized, what's the ~ for ?
I've only been able to find a partial explanation
On Mon, 18 Feb 2013 19:13:13 +
Mateusz Kowalczyk fuuze...@fuuzetsu.co.uk wrote:
On 18/02/13 19:02, bri...@aracnet.com wrote:
Hi all,
I was creating bigger uncurries which I am simply extending from an
existing uncurry I found some where, e.g.
uncurry4 :: (a - b - c - d - e) -
On Tue, 12 Feb 2013 15:57:37 -0700
Nicolas Bock nicolasb...@gmail.com wrote:
Here is haskell version that is faster than python, almost as fast as c++.
You need to install bytestring-lexing package for readDouble.
I was hoping Branimir could comment on how the improvements were allocated.
Hi,
Trying to understand how to write a document using a pickler but I can't make
sense of the types.
From the example:
runX ( xunpickleDocument xpSeason
[ withValidate no
, withTrace 1
,
On Thu, 24 Jan 2013 17:05:15 +0100
Erik Hesselink hessel...@gmail.com wrote:
There's showPickled [0] and unpickleDoc [1], maybe those help?
Thank you , they help a lot :-) I was stuck looking in
Text.XML.HXT.Arrow.Pickle for the answer and got lost trying to decipher
IOStateArrow s a
On Thu, 26 Apr 2012 23:52:47 -0400
Andrew Seniuk ras...@gmail.com wrote:
Somewhat lighter, using summarised module lists. A more sophistocated
UI with per-column filtering is in the works. I invite your comments.
Andrew
On Thu, Apr 26, 2012 at 4:05 PM, Andrew Seniuk ras...@gmail.com
Hello,
I've got ghc 7.2.2 installed.
trying to install cabal-install-0.10.2 results in:
Linking Setup ...
Configuring Cabal-1.10.1.0...
Setup: At least the following dependencies are missing:
base =4 3 =2 5, unix =2.0 2.5
Error during cabal-install bootstrap:
Configuring the Cabal package
On Tue, 06 Sep 2011 15:16:09 -0400
Michael Orlitzky mich...@orlitzky.com wrote:
I'm working on a program where I need to compute a gajillion (171442176)
polynomials and evaluate them more than once. This is the definition of
the polynomial, and it is expensive to compute:
polynomial ::
On Mon, 27 Jun 2011 11:15:28 +0300
Yitzchak Gale g...@sefer.org wrote:
The biggest shortcoming, in my opinion, is that the documentation
assumes that the reader is very familiar with the Haskell type
system, and with viewing type signatures and instance lists as an
integral and central part
Hi,
I hate to even ask this because the answer is probably staring me in the face.
This trac page
http://hackage.haskell.org/trac/PolyFunViz/wiki/IEEEVisCode
talks about the code being available through darcs but I can't seem to put my
hands on the http address I would need to pull the code.
On Sun, 12 Jun 2011 21:25:22 +0100
Malcolm Wallace malcolm.wall...@me.com wrote:
http://hackage.haskell.org/trac/PolyFunViz/wiki/IEEEVisCode
talks about the code being available through darcs but I can't seem to put
my hands on the http address I would need to pull the code.
This
On Sat, 11 Jun 2011 10:34:47 -0700
Alexander Solla alex.so...@gmail.com wrote:
On Sat, Jun 11, 2011 at 10:06 AM, Sean Perry sha...@speakeasy.net wrote:
Choices, choices.
The first one is to use unit tests. Look at the grammar and make sure the
obvious stuff fails or succeeds. a + b, a
Hi All,
Currently debian stable installs ghc 6.12.1.
I'd like to use the latest version of repa which is built on ghc 7.0, and my
attempts to placate cabal's complaints about the installation of various
packages isn't going anywhere.
It's not obvious to me that there's an advantage to using
On Mon, 16 May 2011 20:33:12 +0400
Grigory Sarnitskiy sargrig...@ya.ru wrote:
Hello!
I'm probing CUDA with Haskell, accelerate package to be exact. Sound stupid,
but I couldn't find how to actually construct an array, for example Vector
Float.
There is quite a number of examples
for example:
I will ask the glorious compiler, and it says:
*Main :t calcFFT
calcFFT
:: (Math.FFT.Base.FFTWReal r) =
V.Vector (Complex r) - V.Vector (Complex r)
I then put the signature in my code, reload it, and:
Not in scope: type constructor or class `Math.FFT.Base.FFTWReal'
It
Howdy,
as usual, the haskell type system complete defeats me in the simplest of
applications:
import Data.Array.Repa as A
import Data.Array.Repa.Index
import Data.Array.Repa.Shape as AS
main = do
let x = A.fromList (AS.shapeOfList [2, 2]) ([1.0, 2.0, 3.0, 4.0]::[Double])
putStrLn $ show x
On Sun, 8 May 2011 16:23:59 -0700
Rogan Creswick cresw...@gmail.com wrote:
Newt scans the input (either a file, directory or stdin) for tags
marked with tagName [1], then replaces those entries with
values specified on the command line, producing either a new file,
modifying the input
On Mon, 14 Mar 2011 02:33:13 -0400
Brandon S Allbery KF8NH allber...@gmail.com wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
On 3/13/11 03:16 , bri...@aracnet.com wrote:
ghc: fdWriteBuf: resource vanished (Broken pipe)
which make sense, sort of. I write a value, let's say 10,
Hi all,
here's the code:
writer =
do threadDelay 10
threadWaitWrite fd
fdWrite fd ((show x) ++ \n)
writer fd (x+1)
pretty simple, it just keeps writing. What happens though is that,
eventually, the reader goes away, i.e. closes the fifo.
When that happens I get:
ghc:
On Mon, 28 Feb 2011 02:58:58 +
Felipe Almeida Lessa felipe.le...@gmail.com wrote:
On Sun, Feb 27, 2011 at 6:48 AM, by way of bri...@aracnet.com
bri...@aracnet.com wrote:
the binding-DSL examples do NOT use the above PRAGMA anywhere in the
code.
Probably they have
Extensions:
On Sat, 26 Feb 2011 22:42:15 -0700
Chris Smith cdsm...@gmail.com wrote:
On Sat, 2011-02-26 at 21:36 -0800, bri...@aracnet.com wrote:
[1 of 2] Compiling Bindings.HDF5( dist/build/Bindings/HDF5.hs,
interpreted ) *** Parser:
src/Bindings/HDF5.hsc:49:8: parse error on input `import'
Howdy,
I worked out a small hdf5 binding using cabal and bindings-DSL and
sqlite3 as my example.
Time to try it !
ghci -idist/build/ dist/build/Bindings/HDF5.o -lhdf5 -lhdf5_hl
hdf5_pkg_test.hs
GHCi, version 6.12.1: http://www.haskell.org/ghc/ :? for help
Loading package ghc-prim ... linking
On Sat, 26 Feb 2011 18:18:27 -0800 (PST)
Brandon Moore brandon_m_mo...@yahoo.com wrote:
I assume there's a LINE directive in the file it's actually reading.
Run ghci with -v to see what file it's actually trying to read.
Here's the relevant output with -v flag:
compile: input
Hi all,
I'm working on an FFI and as usual there are lots of defines in
the header files.
What's the best way to make these available to the haskell code ?
Ideally it could be done automagically, or at least pseudo-magically so
that keeping up with changes to the .h wouldn't be too painful.
I'm
Hi,
for example :
ghc -e main foo.hs these should be treated as args for argv
I'm wondering if there is a magic option to indicate that everything
after this option is an arg option.
Thanks
Brian
P.S. yes I know about :main args in ghci.
___
Hi,
I have a program with a debug flag in it (Strangely I've yet to be
able to write bug-free code). I'd like to change the state of the
debug flag based on command line args.
I looked at IOVar but that would cause all the pure procedures to get
swallowed by the IO Monad.
Is a better way to
is there a way to search the haskell-cafe list.
I found a potential link on the haskell wiki, but the link is busted.
Didn't see anything on the haskell-cafe mailing list page.
Thanks,
Brian
___
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I've been running around the gtk2hs web site and can't seem to find the
actual code (I did find the cairo blog, with examples but no code).
Can some kind soul post a link ?
Thanks
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On Sun, 8 Aug 2010 11:13:33 -0700
bri...@aracnet.com wrote:
I've been running around the gtk2hs web site and can't seem to find
the actual code (I did find the cairo blog, with examples but no
code).
Can some kind soul post a link ?
and here you go:
I reported a seg-fault in chart a while back.
so I was experimenting with cairo and rendering to to the screen, which
if my understanding is correct, uses gtk. Certainly looks like it.
So I compiled the cairo example Drawing.hs and that worked fine.
I then tried running the example from ghci,
On Mon, 09 Aug 2010 11:09:40 +0800
Andy Stewart lazycat.mana...@gmail.com wrote:
Ivan Lazar Miljenovic ivan.miljeno...@gmail.com writes:
On 9 August 2010 09:44, Andy Stewart lazycat.mana...@gmail.com
wrote:
Which ghc version?
The Glorious Glasgow Haskell Compilation System, version
On Thu, 5 Aug 2010 21:58:15 -0500
Tom Hawkins tomahawk...@gmail.com wrote:
Good, we need more functional programmers actually solving real
problems. But please put your skills to work in an industry other
than investment banking.
+1000
___
On Mon, 26 Jul 2010 21:54:16 -0700
Thomas DuBuisson thomas.dubuis...@gmail.com wrote:
Can you boil this down to some simple example code? Are you using a
recent version of Chart? And your definition of latest gtk2hs is
11, right? How about your gtk+ C library, it what? 2.20?
I can run
Seems to be ok rendering to png files.
I was wondering if anybody has been using Chart and may have seen the
same thing.
I'm running ghc 6.12.1 and the latest and greatest gtk2hs :-)
Thanks,
Brian
p.s. the amplitude modulation
___
Haskell-Cafe
On Sat, 17 Jul 2010 18:02:05 -0400
Brandon S Allbery KF8NH allb...@ece.cmu.edu wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
On 7/17/10 13:23 , Christopher Done wrote:
On 17 July 2010 18:18, Niemeijer, R.A. r.a.niemei...@tue.nl wrote:
Screenshot: http://imgur.com/9LHvk.jpg
Live
On Wed, 14 Jul 2010 21:05:35 +0800
Andy Stewart lazycat.mana...@gmail.com wrote:
Where's the demo directory ?!
Sorry, we forgot add demo in .cabal file when we released
gtk2hs-0.11.0, We will include all demos in gtk2hs-0.11.1
I think that would be very helpful. It's a big package with
Short version of this post:
Looks like the intsall depends on alex and that dependencies doesn't
appear to be handled, i.e. I had to install alex before proceeding.
why do is it called gtk2hs if you are actually installing package
gtk ;-)
Where's the demo directory ?!
Moral of the story: don't
On Thu, 06 May 2010 12:00:01 +0100
Neil Brown nc...@kent.ac.uk wrote:
At which point I prefer Ivan's liftM version rather than the above
section (or worse: using ($) prefix). The original request is a
relatively common thing to want to do, so I was slightly surprised
that hoogling for:
I was doing the following:
do status - mapM PF.getFileStatus filenames
let times = map PF.modificationTime status
let sorted = sortBy (\(_, t1) (_,t2) - compare t1 t2) (zip filenames times)
and I thought, surely I can combine the status and times definitions into one
line, only I can't.
On Thu, 6 May 2010 15:07:30 +1000
Ivan Miljenovic ivan.miljeno...@gmail.com wrote:
On 6 May 2010 15:01, bri...@aracnet.com wrote:
I was doing the following:
do status - mapM PF.getFileStatus filenames
let times = map PF.modificationTime status
let sorted = sortBy (\(_, t1)
On Thu, 01 Apr 2010 14:14:42 +0200
Günther Schmidt gue.schm...@web.de wrote:
Hi all,
I'm just starting with Haskells Crypto Libs. Is there a good intro to
the subject?
I intend to use it for license key generation.
Applied Cryptography
http://www.schneier.com/book-applied.html
Brian
On Wed, 31 Mar 2010 01:32:56 -0400
wagne...@seas.upenn.edu wrote:
Two values of LocalTime may well be computed with respect to
different timezones, which makes the operation you ask for dangerous.
First convert to UTCTime (with localTimeToUTC), then compare.
that makes sense. unfortunately
On Thu, 01 Apr 2010 06:20:25 +0200
Maciej Piechotka uzytkown...@gmail.com wrote:
On Wed, 2010-03-31 at 19:29 -0700, bri...@aracnet.com wrote:
On Wed, 31 Mar 2010 01:32:56 -0400
wagne...@seas.upenn.edu wrote:
Two values of LocalTime may well be computed with respect to
different
which is a variation of the question, why can't I compare localtimes ?
or am I missing something in Time (yet again).
Thanks,
Brian
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On Sun, 07 Feb 2010 01:38:08 +0900
Benjamin L. Russell dekudekup...@yahoo.com wrote:
On Tue, 02 Feb 2010 09:16:03 -0800, Creighton Hogg wrote:
2010/2/2 Álvaro García Pérez agar...@babel.ls.fi.upm.es
You may try Pierce's Basic Category Theory for Computer
Scientists or Awodey's
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