On 23 August 2010 06:12, Erik de Castro Lopo wrote:
> I'm going to be a bit of a heretic here and suggest that you attack
> this problem from the other end. How you ask?
>
> Install Debian Testing/Unstable with Wine in a VM and cross compile
> to Windows.
>
No - that's a completely azzback solut
On Aug 21, 2010, at 5:14 AM, Michael Litchard wrote:
> Thank you all for your encouragement. I need to think about the core
> functionality, and do some reading.
But what _is_ "the core functionality".
The Single Unix Specification can be browsed on-line.
There is no part of it labelled "core";
On Aug 21, 2010, at 4:12 AM, John Millikin wrote:
> This thought occurred to me, but really, how often are you going to
> have a 10 GiB **text** file with no newlines?
When you have a file developed on a system that follows a
different new-line convention. I haven't seen a file that
big, but I'm
Andrew Coppin wrote:
> I too was going to have a go at this. I had a Windows VM (so I don't
> ruin my *real* Windows box) and I was going to set up all the junk which
> is apparently necessary to make C bindings build. And then I was going
> to build all the libraries I want but can't have, pac
Andrew Coppin wrote:
> Well, part of the issue is that it just annoys me as a matter of
> principle that I have to install a *Unix* emulator in order to write
> *Windows* software. What's up with that?
You've actually got that a bit backwards. GHC, Curl and all the
other things you are complain
For anyone interested in iteratees (etc) and not yet on the iteratees
mailing list.
I'm asking about what iteratees *mean* (denote), independent of the various
implementations. My original note (also at the end below):
With the encouragement & help of Conrad Parker, I've been looking at
> iterat
I just installed Haskell 2010.2.0.0 on Windows XP Pro SP3.
When I run winGHCI, I briefly get a displayed window, immediately followed
by a "black screen". I have to restart my computer to get rid of it.
I have been advised that this is a bug and wonder if it can be fixed.
David Webster
On Sat, Aug 21, 2010 at 09:57:52AM +0100, Andrew Coppin wrote:
> When I first started using Haskell, I got the impression that there were
> hundreds, maybe even thousands, of developers working on GHC. (After
> all, how else could you write such a huge codebase in less than two
> centuries?)
What haskell really needs is a big ' hit' where someone shows how powerful
haskell is in some environment.
Ruby had RoR, which is what splurged the language into the open
On 22/08/2010 3:46 PM, "wren ng thornton" wrote:
Daniel Fischer wrote:
>
> On Saturday 21 August 2010 15:35:08, Ivan Lazar M
On Sun, Aug 22, 2010 at 7:47 PM, Daniel Peebles wrote:
> You could also do some (in my opinion) fairly nasty stuff with
> Dynamic or Typeable, adding a constraint to the Eq and
> attempting to cast at runtime (returning False if the cast
> returns Nothing).
This is what he's talking about:
> {-#
The problem is that you have an existential `t` there, and two values of the
type Foo might not have the same `t` inside them.
What do you want to happen if someone writes Foo True == Foo "yep"?
The only real solution here is to parametrize your Foo type by the t that
lives within it, so you can
Hello,
playing with GADTs I ran into a problem with rigid type variables
which is ilustrated by the following example. I think it should be
pretty clear what I'am trying to express... Any suggestions?
snip
{-# LANGUAGE GADTs #-}
data Foo where
Foo :: (Eq t) => t -> Foo
instance Eq Fo
Well, now I know why the "iteratee" package never defined something
like "iterFile" -- it's not really possible. The only way to open
handles within an iteratee prevents exception-safe release.
enumerator-0.3 will remove the iterFile functions. iterHandle will
remain, to be used as in your second
Ah, whenever I see "div/mod 3" in a Sudoku solver,
I feel that's not using the right model.
It's not a square, it's a hypercube, folks!
type Index = ( Int,Int,Int,Int )
neighbours :: Index -> [ Index ]
neighbours (a,b,c,d) = do
i <- [ 0 .. 2 ] ; j <- [ 0 .. 2 ]
[ (i,j,c,d), (a,b,i,j), (a
L.S.,
I am trying to compile the current release of UHC (1.0.1); I started with
the installation of the most recent version of uulib and uuagc. When
running
make uhc
I received the following message:
EH\Util\CompileRun.hs:46:7:
Could not find module `UU.DData.Scc':
Use -v
It's certainly a bug in iterFile -- I think it'll have to be modified
to close the file on EOF, not after returning a continuation.
Semi-working in the compiled version is probably just a quirk of the
garbage collector and/or OS.
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I forgot to mention that the file "bar" is created but empty. So it seems
the Iteratee opens it and then closes it prematurely.
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Hi all,
I was trying out the enumerator package. I wanted to copy the contents of
one file to another:
module Main where
import Data.Enumerator
import Data.Enumerator.IO
main = run (enumFile "foo" $$ iterFile "bar")
If I compile this code with GHC, it works as expected. But if I run it with
runh
On Sunday 22 August 2010 22:15:02, Luke Palmer wrote:
> On Sun, Aug 22, 2010 at 1:18 PM, Daniel Fischer
>
> wrote:
> > On Sunday 22 August 2010 20:12:16, Vladimir Matveev wrote:
> >> I think the problem is with terribly inefficient data representation.
> >
> > Worse, it's a terribly inefficient al
Thanks for explanation. One more question: are there any materials
except LogicT.pdf from link on the logict hackage entry? I'd like to
read something on this interesting topic because the above code looks
kinda obfuscated to me :)
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On Sun, Aug 22, 2010 at 1:18 PM, Daniel Fischer
wrote:
> On Sunday 22 August 2010 20:12:16, Vladimir Matveev wrote:
>> I think the problem is with terribly inefficient data representation.
>
> Worse, it's a terribly inefficient algorithm.
> The constraints are applied too late, so a huge number of
Hi,
Am Dienstag, den 03.08.2010, 22:52 +0200 schrieb Joachim Breitner:
> I have written a tool to interactively edit patches, which under the
> hood uses the Darcs API. A more catchy introduction, including a
> screencast, can be found on
> https://www.joachim-breitner.de/blog/archives/425-ipatch,
On Sunday 22 August 2010 20:12:16, Vladimir Matveev wrote:
> I think the problem is with terribly inefficient data representation.
Worse, it's a terribly inefficient algorithm.
The constraints are applied too late, so a huge number of partial boards
are created only to be pruned afterwards. Since
On Sunday 22 August 2010 19:23:03, Yves Parès wrote:
> In fact the encoding problem is more general.
>
> When I simply do 'readFile "bar/fooé"', then I'm told:
> *** Exception: bar/fooé: openFile: does not exist (No such file or
> directory)
Try
ghci> readFile (Data.ByteString.Char8.unpack
(Data
I think the problem is with terribly inefficient data representation.
I've written sudoku solver some time ago too using different data
structures, including Data.Array, Data.Vector and simple lists. Lists
are very inefficient in this case, because accessors for lists have
O(n) complexity. Immutabl
On 22.08.2010 21:23, Yves Parès wrote:
In fact the encoding problem is more general.
When I simply do 'readFile "bar/fooé"', then I'm told:
*** Exception: bar/fooé: openFile: does not exist (No such file or
directory)
How am I supposed to read files whose names contains non-ASCII characters?
(I
> sudoku solver using the LogicT monad.
> [...] works but it is extremely slow,
Any sudoku should be easily solvable by a program
that always case-splits on the unknown that has the fewest
remaining possible assignments.
The proper general framework for this is "finite domain constraint sys
In fact the encoding problem is more general.
When I simply do 'readFile "bar/fooé"', then I'm told:
*** Exception: bar/fooé: openFile: does not exist (No such file or
directory)
How am I supposed to read files whose names contains non-ASCII characters?
(I use GHC 6.12.3 under Ubuntu 10.04 32bits
On 22/08/10 17:56, Yves Parès wrote:
> I looked at both, and I have encoding issues with both.
>
> My locale is fr_FR.utf8
> For instance, with HSH:
> I have a 'bar' directory, containing a file 'fooé'
>
> run $ "find bar" :: IO [String]
> returns me : ["bar", "bar/foo*\233*"]
>
> and run $ "find b
I looked at both, and I have encoding issues with both.
My locale is fr_FR.utf8
For instance, with HSH:
I have a 'bar' directory, containing a file 'fooé'
run $ "find bar" :: IO [String]
returns me : ["bar", "bar/foo*\233*"]
and run $ "find bar -name fooé"
returns []
When I provoke an error by
Felipe Lessa wrote:
Hello!
I take it that the problem is that libcurl is a C library with a
Unix-like build system, and that is the problem that needs Cygwin,
right?
No.
It's completely possible to download a pre-built binary for libcurl (or
just about any other OSS library, for that matt
On 22 August 2010 16:56, Tillmann Rendel
wrote:
> One needs a compiler and libraries on the one hand, and a bunch of
> command-line tools on the other hand. On Windows, MinGW provides the former,
> while Cygwin provides a package manager to install the latter.
Its not ideal to use MinGW with Cg
Stephen Tetley wrote:
Andrew, I was going to chastise you for being the only Windows
developer who has problems with MinGW / MSYS and spreading that
unpleasant internet commodity "FUD". However, I've just gone back to
mingw.org and its gone from "somewhat confusing" circa the last time I
installe
Thanks for the HSH link, Magnus.
Concerning FileManip, it seems that I can't perform easily a
case-insensitive search (for instance with find, you just use -iname instead
of -name). Am I wrong?
2010/8/22 Magnus Therning
> On 22/08/10 16:32, Yves Parès wrote:
> > Hello,
> >
> > I would like to
On 22/08/10 16:32, Yves Parès wrote:
> Hello,
>
> I would like to recode in Haskell a piece of bash program that uses find.
> The advantage of find is that it is quite easy to use and fast.
> Is there a package that let us access to find-like functionnalities, with
> similar performances? Or at lea
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On 08/22/2010 07:19 AM, Jonas Almström Duregård wrote:
>> Now, you say it's preferable to use the native package manager
>> where possible. I've got one word for you: Windows. You know, the
>> most popular OS on the market? The one installed on 98% of
Thanks, I will take a look at it.
2010/8/22 Erik Hesselink
> I've used the FileManip package for this. It works fine for my
> purposes. I have no idea what the performance is, though, beyond 'good
> enough not to care at the moment'.
>
> Erik
>
> On Sun, Aug 22, 2010 at 17:32, Yves Parès wrote
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On 08/22/2010 06:41 AM, Andrew Coppin wrote:
> Ivan Lazar Miljenovic wrote:
>> Hackage has limited support for distro maintainers to state which
>> packages are available on the distribution. Last I checked, it
>> required
>> distro maintainers to ke
I've used the FileManip package for this. It works fine for my
purposes. I have no idea what the performance is, though, beyond 'good
enough not to care at the moment'.
Erik
On Sun, Aug 22, 2010 at 17:32, Yves Parès wrote:
> Hello,
>
> I would like to recode in Haskell a piece of bash program th
Felipe Lessa wrote:
I take it that the problem is that libcurl is a C library with a
Unix-like build system, and that is the problem that needs Cygwin,
right?
One needs a compiler and libraries on the one hand, and a bunch of
command-line tools on the other hand. On Windows, MinGW provides the
Hi,
Am Sonntag, den 22.08.2010, 10:55 +0100 schrieb Andrew Coppin:
> Browsing around Hackage, I notice that a seemingly random subset of
> packages are available for something called "arch linux". Presumably
> some sort of automatic conversion system is involved, but does anyone
> know why only
Hello,
I would like to recode in Haskell a piece of bash program that uses find.
The advantage of find is that it is quite easy to use and fast.
Is there a package that let us access to find-like functionnalities, with
similar performances? Or at least some C functions that could be used
through t
> It looks as if it's automated for Arch, however. Either that or somebody is
> spending an absurd amount of time keeping it manually up to date.
Yeah, it's automated, Don Stewart made a script to do that.
http://archhaskell.wordpress.com/
--
==
Ivan S
On Sat, Aug 21, 2010 at 23:14, Paulo Tanimoto wrote:
> One question: enumFile has type
>
> enumFile :: FilePath -> Enumerator SomeException ByteString IO b
>
> and iterParser has type
>
> iterParser :: Monad m => Parser a -> Iteratee ParseError ByteString m a
>
> How do we use both together?
On Sun, Aug 22, 2010 at 5:04 PM, Stephen Tetley
wrote:
> Andrew, I was going to chastise you for being the only Windows
> developer who has problems with MinGW / MSYS and spreading that
> unpleasant internet commodity "FUD". However, I've just gone back to
> mingw.org and its gone from "somewhat c
Hello All,
Apologies if some have you have got this twice but I posted this once
via fa.haskell on Goggle but I don't think it goes anywhere outside
Google.
In an attempt to learn how to use monads, I've tried to write a simple
sudoku solver using the LogicT monad. I think it works but it is
extr
On 22 August 2010 13:48, Felipe Lessa wrote:
> I take it that the problem is that libcurl is a C library with a
> Unix-like build system, and that is the problem that needs Cygwin,
> right?
No - generally you don't want to compile bindings with Cygwin,
compiling with Cygwin brings in dependencie
Hello!
I take it that the problem is that libcurl is a C library with a
Unix-like build system, and that is the problem that needs Cygwin,
right?
I'm not a Windows expert, but having C code is perfectly fine, I
guess. My 'hipmunk' library includes a whole C library. When I tried
to 'cabal insta
Andrew, I was going to chastise you for being the only Windows
developer who has problems with MinGW / MSYS and spreading that
unpleasant internet commodity "FUD". However, I've just gone back to
mingw.org and its gone from "somewhat confusing" circa the last time I
installed (Christmas 2009) to "f
Jonas Almström Duregård writes:
>> Now, you say it's preferable to use the native package manager where
>> possible. I've got one word for you: Windows. You know, the most popular OS
>> on the market? The one installed on 98% of all computers world-wide? Guess
>> what: no native package manager.
> Now, you say it's preferable to use the native package manager where
> possible. I've got one word for you: Windows. You know, the most popular OS
> on the market? The one installed on 98% of all computers world-wide? Guess
> what: no native package manager.
Isn't Windows Installer (MSI) a packa
Andrew Coppin writes:
> Ivan Lazar Miljenovic wrote:
>> Hackage has limited support for distro maintainers to state which
>> packages are available on the distribution. Last I checked, it required
>> distro maintainers to keep a text file somewhere up to date.
>>
>> Note that not all distributio
Ivan Lazar Miljenovic wrote:
Hackage has limited support for distro maintainers to state which
packages are available on the distribution. Last I checked, it required
distro maintainers to keep a text file somewhere up to date.
Note that not all distributions bother.
Yeah, I figured. I don't
Andrew Coppin writes:
> Browsing around Hackage, I notice that a seemingly random subset of
> packages are available for something called "arch linux". Presumably
> some sort of automatic conversion system is involved, but does anyone
> know why only certain packages appear?
>
> I've noticed that
Browsing around Hackage, I notice that a seemingly random subset of
packages are available for something called "arch linux". Presumably
some sort of automatic conversion system is involved, but does anyone
know why only certain packages appear?
I've noticed that both Debian and OpenSUSE have
Jesse Schalken writes:
> I would also like to strongly discourage code generators.
>
> Any code that has to be "generated" can and should have its common
> characteristics separated out with only unique characterstic remaining
> typically with an interface (i.e. type class) or polymorphic type
>
gdwe...@iue.edu wrote:
I will try my hand at building a Windows binary for Sifflet
and making it available for folks to download.
I too was going to have a go at this. I had a Windows VM (so I don't
ruin my *real* Windows box) and I was going to set up all the junk which
is apparently nece
Jesse Schalken wrote:
I would also like to strongly discourage code generators.
Any code that has to be "generated" can and should have its common
characteristics separated out with only unique characterstic remaining
typically with an interface (i.e. type class) or polymorphic type
dividing th
Bill Atkins wrote:
Have you looked at creating Template Haskell splices to generate this for you?
The thought had crossed my mind.
On the other hand, with my current approach, the generated code is just
another source file that doesn't look any different. On reflection, I
kinda like that.
I would also like to strongly discourage code generators.
Any code that has to be "generated" can and should have its common
characteristics separated out with only unique characterstic remaining
typically with an interface (i.e. type class) or polymorphic type
dividing the two, creating a separa
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