[Haskell-cafe] nhc vs ghc

can anyone provide a concise list of the major differences between nhc98 and ghc? for example, can i build a cabal package with nhc98? i get that ghc and nhc98 are not interchangeable, otherwise i am not sure thanks pgpIGhA0uHtR7.pgp Description: PGP signature ___

Re: [Haskell-cafe] Re: An interesting monad: "Prompt"

On Fri, 2007-11-23 at 21:11 -0800, Ryan Ingram wrote: > On 11/22/07, apfelmus <[EMAIL PROTECTED]> wrote: > A context passing implementation (yielding the ContT monad > transformer) > will remedy this. > > Wait, are you saying that if you apply ContT to any monad that has

Re: [Haskell-cafe] Re: An interesting monad: "Prompt"

On 11/22/07, apfelmus <[EMAIL PROTECTED]> wrote: > > A context passing implementation (yielding the ContT monad transformer) > will remedy this. Wait, are you saying that if you apply ContT to any monad that has the "left recursion on >>= takes quadratic time" problem, and represent all primitive

Re: [Haskell-cafe] Unix (Posix) low-level device driver functionality?

Galchin Vasili wrote: In any case, it seems like the GHC documentation allows "raw driver I/O"but when I look at the actual GHC 6.8.1 libraries I don't see low level driver functionailty. On Unix, at least, you don't need anything special to write userspace device drivers. You normally open

Re: [Haskell-cafe] Unix (Posix) low-level device driver functionality?

vigalchin: >Hello, > > I am seriously trying to push the mainstream computer industry. I am a >kernel developer for POSIX OS's (e.g. Linux) and Windows. I would at the >very least be able to write "test"/correctness software in Haskell where I >am able to open Unix/Windows dr

[Haskell-cafe] Unix (Posix) low-level device driver functionality?

Hello, I am seriously trying to push the mainstream computer industry. I am a kernel developer for POSIX OS's (e.g. Linux) and Windows. I would at the very least be able to write "test"/correctness software in Haskell where I am able to open Unix/Windows drivers and test storage firmware. The p

Re: [Haskell-cafe] Re: Composing monads

On Nov 23, 2007 6:24 PM, Jules Bean <[EMAIL PROTECTED]> wrote: > ...i.e. I wouldn't be afraid of a lambda in a case like that. IME it's > moderately common to have to do: > > mapM_ (\a -> some stuff >> something_with a >> some stuff) ll This has terrible endweight. In this imperativesque case, I'

Re: [Haskell-cafe] Polymorphic dynamic typing

Paulo Silva wrote: > Type representations using GADTs are being used to achieve dynamic > typing in Haskell. However, representing polymorphic types is > problematic. Does anyone know any work about including polymorphism in > dynamic typing? First, a warning: fragile code follows, possibly levera

Re: [Haskell-cafe] very elementary "import" problem .. help

On Nov 23, 2007 1:43 PM, Galchin Vasili <[EMAIL PROTECTED]> wrote: > I am loading the above script in ghci. However, System.Posix, System.Process > and STM cannot be found. Network and Directory are found. I assume when ghc > is installed on Windows that the Windows registry get populated with path

Re: [Haskell-cafe] Haskell code in Wordpress

On Fri, 2007-11-23 at 20:22 +, Paulo J. Matos wrote: > Hi all, > > I'm curious about the best way to typeset haskell code in a wordpress > blog. Using blockquote removes all indentation. :-( For the Gtk2Hs website I used a program (partly derived from hscolour) to highlight and adds links to

Re: [Haskell-cafe] Re: Composing monads

On Fri, 2007-11-23 at 23:01 +0100, Roberto Zunino wrote: > Maurí­cio wrote: > > main = mapM_ ((putStrLn "") >*> putStrLn) $ > > map show [1,2,3] > > Using only standard combinators: > > main = mapM_ ((putStrLn "" >>) . putStrLn) $ map show [1,2,3] == mapM_ ((putStrLn "" >>) . putStrL

Re: [Haskell-cafe] Re: Composing monads

Maurí­cio wrote: > main = mapM_ ((putStrLn "") >*> putStrLn) $ > map show [1,2,3] Using only standard combinators: main = mapM_ ((putStrLn "" >>) . putStrLn) $ map show [1,2,3] Zun. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell

[Haskell-cafe] very elementary "import" problem .. help

Hello, import System.Posix --import Network import System.Process --import Directory import STM I am loading the above script in ghci. However, System.Posix, System.Processand STM cannot be found. Network and Directory are found. I assume when ghc is installed on Windows that the Windows regist

Re: [Haskell-cafe] Call external program and get stdout

Allan Clark wrote: > -- Create the process > do (_pIn, pOut, pErr, handle) <- runInteractiveCommand command > -- Wait for the process to finish and store its exit code > exitCode <- waitForProcess handle Warning: this will get stuck if the command output is so big that it fills the SO

[Haskell-cafe] Re: Composing monads

> main :: IO () > main = mapM_ ((putStrLn "") >*> putStrLn) $ >map show [1,2,3] > A couple other ways to do this code. Without monad combinators main = mapM_ putStrLn . ("":) . intersperse "" . map show $ [1..3] With your combinator, but collapsing it so we don't map over the col

[Haskell-cafe] Interrupting threads and ualarm

Hello Haskellers, I have two questions for you: * Is there a Haskell binding to the ualarm() function in unistd.h? I looked in System.Posix.Signals, but there's just a binding for alarm(). * Is there a way to interrupt a blocking operation on another thread? I thought about throwTo, but that

Re: [Haskell-cafe] Haskell code in Wordpress

On 23/11/2007, Paulo J. Matos <[EMAIL PROTECTED]> wrote: > Hi all, > > I'm curious about the best way to typeset haskell code in a wordpress > blog. Using blockquote removes all indentation. :-( > There is a code highlighter for wordpress that works for Haskell code, but it's a bit of a pain to us

Re: [Haskell-cafe] Haskell code in Wordpress

2007/11/23, Paulo J. Matos <[EMAIL PROTECTED]>: > Hi all, > > I'm curious about the best way to typeset haskell code in a wordpress > blog. Using blockquote removes all indentation. :-( I'm using geshi with wordpress on my blog (codeside.org) and drupal (upcoming haskell.pl page). But you have to

Re: [Haskell-cafe] Haskell code in Wordpress

Paulo J. Matos wrote: Hi all, I'm curious about the best way to typeset haskell code in a wordpress blog. Using blockquote removes all indentation. :-( Cheers, Probably HsColour: http://www.cs.york.ac.uk/fp/darcs/hscolour/ --8<-- hscolour is a small Haskell script to colourise Haskell code.

Re: [Haskell-cafe] Haskell code in Wordpress

Hi > I'm curious about the best way to typeset haskell code in a wordpress > blog. Using blockquote removes all indentation. :-( should work Thanks Neil ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/ha

[Haskell-cafe] Haskell code in Wordpress

Hi all, I'm curious about the best way to typeset haskell code in a wordpress blog. Using blockquote removes all indentation. :-( Cheers, -- Paulo Jorge Matos - pocm at soton.ac.uk http://www.personal.soton.ac.uk/pocm PhD Student @ ECS University of Southampton, UK _

Re: [Haskell-cafe] Polymorphic dynamic typing

derek.a.elkins: > On Fri, 2007-11-23 at 18:45 +, Paulo Silva wrote: > > Hello, > > > > Type representations using GADTs are being used to achieve dynamic > > typing in Haskell. However, representing polymorphic types is > > problematic. Does anyone know any work about including polymorphis

Re: [Haskell-cafe] Polymorphic dynamic typing

On Fri, 2007-11-23 at 18:45 +, Paulo Silva wrote: > Hello, > > Type representations using GADTs are being used to achieve dynamic > typing in Haskell. However, representing polymorphic types is > problematic. Does anyone know any work about including polymorphism > in dynamic typing? Lo

[Haskell-cafe] Polymorphic dynamic typing

Hello, Type representations using GADTs are being used to achieve dynamic typing in Haskell. However, representing polymorphic types is problematic. Does anyone know any work about including polymorphism in dynamic typing? Best regards, Paulo __

Re: [Haskell-cafe] Re: Composing monads

module Main (Main.main) where import Control.Monad import System.IO (>*>) :: Monad m => m () -> (a -> m ()) -> (a -> m ()) (>*>) f f' = \a -> do{ f; f' a; } main :: IO () main = mapM_ ((putStrLn "") >*> putStrLn) $ map show [1,2,3] There is nothing wrong with that, but I would no

Re: [Haskell-cafe] c2hs on Windows?

On Sun, 2007-11-11 at 21:36 +, Alex Young wrote: > Hi all, > > Does anyone know if c2hs should be working on Windows? I'm trying to > build it under ghc 6.8.0, but this happens: I just uploaded c2hs-0.15.1 which builds with all recent versions of ghc 6.4-6.8. I also tested that it builds on

[Haskell-cafe] Re: Composing monads

>> Hi, >> >> If I have two computations a->IO b and >> b->IO c, can I join them to get an a->IO >> c computation? I imagine something like a >> liftM dot operator. > This is called Kleisli composition, by the way; it's > defined as (>=>) in Control.Monad. > jcc > Even if you didn't k

Re: {SPAM 04.4} Re[2]: [Haskell-cafe] http/ftp library

On Fri, Nov 23, 2007 at 10:59:55AM +0300, Bulat Ziganshin wrote: > Hello brad, > > Friday, November 23, 2007, 10:10:41 AM, you wrote: > > > if you need comprehensive support of http and ftp in one api/library, as > > far as i know, the curl bindings are your only choice > > 1. Haskell binding is

[Haskell-cafe] Re: Call external program and get stdout

>>> Hi, >>> >>> How can I call a program (like, for instance, >>> 'grep text *') and get the standard output? >>> (...) >>http://haskell.org/ghc/docs/latest/html/libraries/process-1.0.0.0/System-Process.html > I was using the following: > (...) > do (_pIn, pOut, pErr, handle) <- runInteractiveC

[Haskell-cafe] ANN: Dimensional 0.7.1 (GHC 6.8.1 compatibility)

Dear all, The Dimensional library has been ported to GHC 6.8.1 (it remains backwards-compatible with GHC 6.6.1, and also with Cabal 1.1.6 I believe). The new version number is 0.7.1. Due to a GHC 6.8.1 bug (#1919) the CGS module will not compile and has been disabled. Thanks, Bjorn Buckwalter h

[Haskell-cafe] Re: Source code for Visual Haskell

"Felix Martini" <[EMAIL PROTECTED]> writes: > The documentation of Visual Haskell mentions that the source code is > available under a BSD license. The code is not available from the > download page (http://www.haskell.org/visualhaskell/downloads.html). > Does anone know where to get it? There is

[Haskell-cafe] Digest size

[ with mailing list maintainer's hat on ] Someone asked me if they could get fewer digests per day from haskell-cafe. The threshold for sending out a digest is currently 30k, which is probably the default, but seems a bit small to me. Any objections to bumping it, to say 100k? Cheers,

Re: [Haskell-cafe] http/ftp library

Hi Bulat, Bulat Ziganshin wrote: > i write a file-processing utility and want to allow users open URLs > like the usual files. Another option is MissingPy. You can use the urlopen function from Python. Regards, Yitz ___ Haskell-Cafe mailing list Haskel

Re: [Haskell-cafe] Tetris

Peter Verswyvelen wrote: Laurent Deniau wrote: Peter Verswyvelen wrote: And you still need to think about where you have to introduce delays to avoid infinite loops? I don't see why, unless you want to have a memory or explicitly stop the time which means it's a parameter of the transition as

Re: [Haskell-cafe] expanded standard lib

Magnus Therning wrote: Many other programming languages have packaging strategies that sound very similar. Several of them have managed to have a negative impact on platforms that already have good packaging technologies (i.e. almost every platform apart from Windows ;-). I'd hate to see Haskel

Re: [Haskell-cafe] Composing monads

Maurí­cio wrote: Hi, If I have two computations a->IO b and b->IO c, can I join them to get an a->IO c computation? I imagine something like a liftM dot operator. You've already been shown the >=> operator and how to define it from >>= by other answers. Just for variety, here is how you wou

Re: [Haskell-cafe] Tetris

Conal Elliott wrote: On Nov 21, 2007 3:49 AM, Laurent Deniau <[EMAIL PROTECTED] > wrote: > Peter Verswyvelen wrote: > > Conal Elliott wrote: > >> Moreover, functional programming makes it easy to have much more state > >> than imperative programming, namely state

Re[2]: [Haskell-cafe] http/ftp library

Hello brad, Friday, November 23, 2007, 10:10:41 AM, you wrote: > if you need comprehensive support of http and ftp in one api/library, as > far as i know, the curl bindings are your only choice 1. Haskell binding is not mentioned at http://curl.haxx.se/libcurl/ can we do something to fix it? 2.