On 31 May 2010 20:14, Pete Chown 1...@234.cx wrote:
I was just thinking, interactions between Cabal and the distribution package
manager could get worse, as shared Haskell libraries become more common.
Suppose a distribution ships a package 'foo', but not a package 'bar' which
depends on it.
On Jun 2, 2010, at 9:18 AM, Maciej Piechotka wrote:
Hmm. C, Java co.[1] seems to not have this problem.
Languages that do recognise a difference between
integer quotient-and-remainder and multiplicative inverse:
- MATHEMATICS
- Algol 60, Algol W, Algol 68
- BCPL (/ is integer division, #/
On a similar note, there was no parallelized implementation for
spectral-norm, even though Haskell had been doing rather well on the
single-core benchmark. Heh.
Louis Wasserman
wasserman.lo...@gmail.com
http://profiles.google.com/wasserman.louis
On Tue, Jun 1, 2010 at 10:38 AM, Gwern Branwen
On Jun 2, 2010, at 6:45 AM, Stephen Tetley wrote:
There's a C parser for Happy (LR) - I long while ago I converted this
to Frown (also LR) - both Happy and Frown are parser generators that
take a grammar description and generate a Haskell module that
implements the Parser. Personally I prefer
Perhaps something here may be of use?
http://okmij.org/ftp/Haskell/types.html#class-based-overloading
http://okmij.org/ftp/Haskell/types.html#class-based-dispatch
-Brent
On Mon, May 31, 2010 at 01:32:18PM +0200, Steffen Schuldenzucker wrote:
Dear Cafe,
let:
data True
data False
I decided to remove everything and start again with the Haskell Platform. I am
back up and running enough to make progress.
-Original Message-
From: haskell-cafe-boun...@haskell.org
[mailto:haskell-cafe-boun...@haskell.org] On Behalf Of Ralph Hodgson
Sent: Tuesday, June 01, 2010 4:34 PM
Thanks - Yes that is what I did. I have curl working fine on the MAC - I
will have to devote more time to Windows 7.
The MAC work has revealed a strange problem in download-curl. I'll have more
to say about that later.
-Original Message-
From: Stephen Tetley
Yes - I understand more now - thanks.
-Original Message-
From: daniel.is.fisc...@web.de [mailto:daniel.is.fisc...@web.de]
Sent: Tuesday, June 01, 2010 10:49 AM
To: haskell-cafe@haskell.org; rhodg...@topquadrant.com
Cc: 'Don Stewart'; 'Henning Thielemann'
Subject: Re: [Haskell-cafe]
This appeared to be the case - re-installing the Haskell Platform as opposed to
the latest GHC got things working again.
-Original Message-
From: daniel.is.fisc...@web.de [mailto:daniel.is.fisc...@web.de]
Sent: Tuesday, June 01, 2010 2:03 PM
To: haskell-cafe@haskell.org;
Hello,
I just released threads-0.2. The library which lets you fork threads
and wait for their result.
INSTALL:
$ cabal update
$ cabal install threads
API DOCS:
http://hackage.haskell.org/package/threads-0.2
DEVELOPMENT:
darcs get http://code.haskell.org/~basvandijk/code/threads
CHANGES:
* I
What is the easiest way to create PDF files from Haskell?
It might depend on what you want to do ..
I often create pdf reports from my Haskell programs
(simulations) with text and graphs. I cheat a bit
and use Haskell to automatically create latex documents,
and use gnuplot (there's a
[Apologies if this is the wrong place to ask -- there appears to be no
Happy-specific list.]
I'm interested in experimenting with using a GLR parser to parse some
data that could be interpreted in different ways. I'm trying to use
Happy's GLR mode but I am encountering an error building one of
Ivan Miljenovic wrote:
Pete Chown 1...@234.cx wrote:
... This causes Cabal to install 'foo' (because it
is a dependency) and it won't use the distribution's package manager.
Why won't it? This, of course, depends on how the distribution ships
`foo' in regards to static/shared libraries
Pete Chown 1...@234.cx writes:
Ivan Miljenovic wrote:
Pete Chown 1...@234.cx wrote:
... This causes Cabal to install 'foo' (because it
is a dependency) and it won't use the distribution's package manager.
Why won't it? This, of course, depends on how the distribution ships
`foo' in
David I'm still trying to figure out what the point of the shootout
David really is.
It is a fun and largely flawed competition between languages and their
users :) Fun, on its own, is enough to motivate this project I guess.
--
Paul
___
Hi Tom,
I often create pdf reports from my Haskell programs
(simulations) with text and graphs. I cheat a bit
and use Haskell to automatically create latex documents,
and use gnuplot (there's a helper app on Hackage) for the graphs.
I'd really like to hear more. Do you have any extended
Don wrote
I see fairly regular complaints about too many Haskell libraries,
bewildering choice of difficult-to-determine quality.
I've tried to summarize the state of Hackage, and what projects are
active to make it easier to find high quality libraries:
http://tinyurl.com/2cqw9sb
Before answering your questions I would like to make sure I understand
your Resource type. When I want to create a memory Resource for
example is the following what you have in mind?
{-# LANGUAGE Rank2Types #-}
-- from base:
import Foreign.Ptr ( Ptr )
import Foreign.Marshal.Alloc ( mallocBytes,
The previous can also be generalized using my Resource class:
-- from regions:
import qualified Control.Resource as C ( Resource(..) )
resource :: (MonadCatchIO m, C.Resource resource)
= resource - Resource (C.Handle resource) m
resource r = Resource $ bracket (liftIO $ C.open r)
On Wed, Jun 2, 2010 at 2:28 PM, Bas van Dijk v.dijk@gmail.com
wrote:
Before answering your questions I would like to make sure I understand
your Resource type. When I want to create a memory Resource for
example is the following what you have in mind?
{-# LANGUAGE Rank2Types #-}
--
Don't forget about generating MetaPost and using mpost to generate
graphics. It's really nice to let MetaPost solve linear equations for
you that determine the layout instead of doing it in Haskell.
Linux users should install texlive-pictures and texlive-context to
make it all work. A makefile
On Wed, Jun 2, 2010 at 2:57 PM, Arie Peterson ar...@xs4all.nl wrote:
On Wed, Jun 2, 2010 at 2:28 PM, Bas van Dijk v.dijk@gmail.com
wrote:
Before answering your questions I would like to make sure I understand
your Resource type. When I want to create a memory Resource for
example is the
On Wed, 2010-06-02 at 14:01 +1200, Richard O'Keefe wrote:
For what applications is it useful to use the same symbol
for operations obeying (or in the case of floating point
operations, *approximating* operations obeying) distinct laws?
If the given operations do share something in common.
On Wed, 2 Jun 2010, Maciej Piechotka wrote:
On Wed, 2010-06-02 at 14:01 +1200, Richard O'Keefe wrote:
For what applications is it useful to use the same symbol
for operations obeying (or in the case of floating point
operations, *approximating* operations obeying) distinct laws?
If the
On Wed, Jun 2, 2010 at 2:20 PM, Uwe Schmidt s...@fh-wedel.de wrote:
For ranking the results for a package search, a download statistic could be
very useful and could easily be integrated. If such a statistic would be
available in machine readable format (csv, xml, plain text, ...), we could
Sorry, I missed this post.
Maciej Piechotka schrieb:
Well - i tried to write some package dealing with distributions etc.
If you have something like that:
instance ... = Distribution (Linear a) a where
rand (Linear f s) g =
let (gf, gt) = genRange g
(v, g') =
Bas wrote:
Ordering by nr of direct/indirect reverse dependencies might also be
useful.
this is already done. After indexing the cabal pages, the dependencies are all
known and a package rank is derived from that graph. That is also used in the
(new) function search, functions in base (and
On Wed, Jun 2, 2010 at 12:37 PM, Ivan Lazar Miljenovic
ivan.miljeno...@gmail.com wrote:
Is there a way of making Cabal install dependencies using the system
package manager, then?
For example, I might ask Cabal to install package A. Package A
depends on B and C. A package for B can be
On Wed, Jun 2, 2010 at 4:35 PM, Uwe Schmidt s...@fh-wedel.de wrote:
Bas wrote:
Ordering by nr of direct/indirect reverse dependencies might also be
useful.
this is already done.
Ok nice.
For others who like to have a .csv file version of the reverse
dependency page I quickly hacked
Isn't there a problem with non-type 1 vectorial fonts being
rasterized during this conversion ?
No.
PDF is just a simplified, compressed encoding of PostScript.
Unless there is some special reason to do so, why would
a conversion utility go to the trouble of rasterizing fonts
instead of
On Sat, May 29, 2010 at 7:34 PM, Matt Parker moonmaster9...@gmail.com wrote:
Q3: Which HTML version would you preferably use?
HTML 5. google summer of code should be about pushing the new and exciting.
I can say that HTML 5 will definitely be supported. We use some sort
of metacode to
Thanks to the people who replied about this.
I would also like to thank my ISP for classifying the entire lot as spam
and not showing it to me. *sigh*
Blobs sounds interesting, but seems to require wxHaskell rather than
Gtk2hs. I may be able to use some of the ideas from it though. I haven't
Thanks Stephen,
I'll look at the Parsec documentation ... I'd certainly be interested in the
article. But I thought Parsec was conceptually same as Parselib ... is that
not the case?
Regards,
Kashyap
On Wed, Jun 2, 2010 at 7:12 AM, Richard O'Keefe o...@cs.otago.ac.nz wrote:
On Jun 2, 2010, at
Hi Paul,
During my internship I developed a GLR parser generator and a grammar
interpreter fully in Haskell, in a tool called HaGLR;
You'll find documentation on the tool at:
http://wiki.di.uminho.pt/twiki/bin/view/Research/PURe/HaGLR
The tool is available as part of the UMinho Haskell
Don Stewart wrote:
http://tinyurl.com/2cqw9sb
Thoughts?
Firstly, it pleases me that somebody is taking this problem seriously
and looking at it.
Currently all the information displayed on a package page comes from the
Cabal file. I think it would be useful to be able to
Tying the documentation to the source code
achieves this (mostly), but it seems like there should be a Better
Way(tm)... I'm not sure what though.
Does Haddock support Literate Haskell files? This might be a nice way
to keep tutorials and source code together.
Also perhaps provide for each
Hi Kashyap
They are very close - Parsec has most of the parsers in ParseLib in
either the Parsec.Char or Parsec.Combinator modules, if you import the
Parsec top level, you will get them, e.g:
import Text.ParserCombinators.Parsec
ParseLib has - ident, nat, int - which have analogues in Parsec
If you want to use the easier long-standing libraries from Utrecht, we can provide you with a parser for full Haskell, which you can find in the Utrecht Haskell Compiler (UHC) distribution.In 2002 Alexey Rodriguez produced a C fron-end, using the UUlibs combinators. I am attaching the file with
aditya siram wrote:
Does Haddock support Literate Haskell files?
I believe it does.
This might be a nice way to keep tutorials and source code together.
Plausibly. You could write some literate files which aren't part of the
library sources, and tell Cabal to include them as extra
On 3 June 2010 00:37, Ben Millwood hask...@benmachine.co.uk wrote:
It's worth noting, though, that cabal-install doesn't track installed
packages itself, GHC does.
And this is why cabal-install can't tell you when there are new
versions of executable-only packages (e.g. happy) available: it
On Jun 3, 2010, at 1:13 AM, Maciej Piechotka wrote:
On Wed, 2010-06-02 at 14:01 +1200, Richard O'Keefe wrote:
For what applications is it useful to use the same symbol
for operations obeying (or in the case of floating point
operations, *approximating* operations obeying) distinct laws?
Hello,
I am using Data.ByteString.Lazy.hPut to write data to a network
socket. Is there any portable way to have hPut timeout if no data has
been sent after some time period (say 120s?).
I know that some OSes provide a per socket timeout that I can set in
my application code (instead of
Hi,
there's something wrong with port numbers in the Network.Socket module
of package network. Printing values gives:
*Main PortNum
47138
*Main PortNum 47138
So I thought it's just an error in the show instance of PortNumber,
which shows the bytes flipped. But if I use
Sorry for the double-reply Matthias, but I forgot to CC -cafe (GMail
labs isn't working, so reply-to-all is no longer the default for me :(
).
On 3 June 2010 13:10, Matthias Reisner matthias.reis...@googlemail.com wrote:
there's something wrong with port numbers in the Network.Socket module of
Am 03.06.2010 05:20 schrieb Ivan Miljenovic:
So I thought it's just an error in the show instance of PortNumber, which
shows the bytes flipped. But if I use the following code snippet
sock - socket AF_INET Datagram 0
bindSocket sock $ SockAddrInet (PortNum ) iNADDR_ANY
to bind a socket
si:
Don wrote
I see fairly regular complaints about too many Haskell libraries,
bewildering choice of difficult-to-determine quality.
I've tried to summarize the state of Hackage, and what projects are
active to make it easier to find high quality libraries:
On 2010-06-03 05:10, Matthias Reisner wrote:
Hi,
there's something wrong with port numbers in the Network.Socket module
of package network. Printing values gives:
*Main PortNum
47138
*Main PortNum 47138
Try
(fromIntegral ) :: PortNumber
(Yes, it's weird.)
Cheers,
Bardur
On Wed, Jun 2, 2010 at 10:10 PM, Matthias Reisner
matthias.reis...@googlemail.com wrote:
Hi,
there's something wrong with port numbers in the Network.Socket module of
package network. Printing values gives:
*Main PortNum
47138
*Main PortNum 47138
So I thought it's just
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