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
On Wed, 2010-06-02 at 01:13 +0200, Daniel Fischer wrote:
> On Wednesday 02 June 2010 00:55:08, Maciej Piechotka wrote:
> > On Tue, 2010-06-01 at 15:29 -0700, Evan Laforge wrote:
> > > > [1] By co I mean Ruby, Python, Perl and others. There are no so many
> > > > languages that do recognize the diff
Thanks Daniel, I will give it a try
I just did some work on the MAC to verify that everything worked there. And all
is well with MAC GHC 6.12.1
-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@haske
On Wednesday 02 June 2010 00:55:08, Maciej Piechotka wrote:
> On Tue, 2010-06-01 at 15:29 -0700, Evan Laforge wrote:
> > > [1] By co I mean Ruby, Python, Perl and others. There are no so many
> > > languages that do recognize the difference.
> >
> > % python -Q new
> > Python 2.4.6 (#1, Aug 3 2009
On Tue, 1 Jun 2010 21:10:40 +0200, Bas van Dijk
wrote:
| [...]
| Hi Arie, I would love to see some examples of these resources for
| which you can't define a Resource[1] instance.
| [...]
|
| [1]
|
http://hackage.haskell.org/packages/archive/regions/0.5/doc/html/Control-Resource.html
I had this
On Tue, 2010-06-01 at 15:29 -0700, Evan Laforge wrote:
> > [1] By co I mean Ruby, Python, Perl and others. There are no so many
> > languages that do recognize the difference.
>
> % python -Q new
> Python 2.4.6 (#1, Aug 3 2009, 17:05:16)
> [GCC 4.0.1 (Apple Inc. build 5490)] on darwin
> Type "hel
> [1] By co I mean Ruby, Python, Perl and others. There are no so many
> languages that do recognize the difference.
% python -Q new
Python 2.4.6 (#1, Aug 3 2009, 17:05:16)
[GCC 4.0.1 (Apple Inc. build 5490)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
10 / 3
> I've thought about writing an article for The Monad Reader - moving
> from Graham Hutton's parsers to Parsec, if there's any interest I'll
> look into doing it. For the time being the main difference is probably
> that Parsec parsers generally use the TokenParser module for some of
> the combinat
On Tue, 2010-06-01 at 15:20 -0400, Aaron D. Ball wrote:
>
> > What does (stdin + stderr) `mod` stdout mean (result will be stdin).
>
> In my GHCi (6.12.1) with System.IO, this fails because Handle is not a
> numeric type. What implementation are you using?
Ups. I missed the Handle with Fd. Whi
On Tuesday 01 June 2010 23:21:35, Dan Doel wrote:
> I think SPJ is on record as saying it would add a lot of
> complexity to the current GHC type system,
> and I'm inclined to believe him.
In matters concerning the GHC type system, that's a fairly natural stance,
I think.
__
On Tuesday 01 June 2010 3:40:41 pm Cory Knapp wrote:
> > Note: this is universal quantification, not existential.
> >
> As I would assume. But I always see the "forall" keyword used when
> discussing "existential quantification". I don't know if I've ever seen an
> "exists" keyword. Is there one?
On Tue, 2010-06-01 at 22:40 +0200, Jonas Almström Duregård wrote:
> >> One might expect a == (a/b)*b and other common arithmetic formulas to
> >> hold for division?
>
> > Better not if one's using Float or Double.
>
> I figured someone would say that :)
>
> What about this one:
> round (a/b/c) =
On Tuesday 01 June 2010 22:40:51, Jonas Almström Duregård wrote:
> >> One might expect a == (a/b)*b and other common arithmetic formulas to
> >> hold for division?
> >
> > Better not if one's using Float or Double.
>
> I figured someone would say that :)
*g*
>
> What about this one:
> round (a/b/
On Tuesday 01 June 2010 22:31:21, Ralph Hodgson wrote:
> "base-3.0.3.2-b2241f4c659fe250ebb821a4173f40c9" doesn't exist (use
> --force to override)
>
You probably have a package.conf from the previous GHC still lying around.
If your new GHC is in the system space, it'll probably be enough to remove
On Tue, Jun 1, 2010 at 3:40 PM, Cory Knapp wrote:
>> In the new type, the parameter 'a' is misleading. It has no connection to
>> the
>> 'a's on the right of the equals sign. You might as well write:
>>
>> type CB = forall a. a -> a -> a
>>
> Ah! That makes sense. Which raises a new question: Is
>> One might expect a == (a/b)*b and other common arithmetic formulas to
>> hold for division?
> Better not if one's using Float or Double.
I figured someone would say that :)
What about this one:
round (a/b/c) == round (a/(b*c))
Of course this doesn't work on Integers...
/J
On 1 June 2010 21
On Tue, Jun 1, 2010 at 12:40 PM, Cory Knapp wrote:
> Thanks! That was exactly the sort of response I was looking for.
>
> This explains why you need to double up for your current definitions. To
>> choose between two booleans (which will in turn allow you to choose
>> between
>> 'a's), you need a
"base-3.0.3.2-b2241f4c659fe250ebb821a4173f40c9" doesn't exist (use --force
to override)
Having installed GHC 6.12.2, I am hitting these problems with every package
I tried to install:
C:\Users\Ralph>cabal install parsec
Resolving dependencies...
Configuring parsec-2.1.0.1...
Preprocessin
On Jun 1, 2010, at 12:20 PM, Aaron D. Ball wrote:
The underlying object here is a Unix file descriptor, which is just a
number. In that sense, stdin is 0, stdout is 1, and stderr is 2, so
this would be (0 + 2) (mod 1) = 0
Every integer is 0 (mod 1).
__
Thanks! That was exactly the sort of response I was looking for.
This explains why you need to double up for your current definitions. To
> choose between two booleans (which will in turn allow you to choose between
> 'a's), you need a CB (CB a). You can eliminate the asymmetric type, though,
> li
> What does (stdin + stderr) `mod` stdout mean (result will be stdin).
In my GHCi (6.12.1) with System.IO, this fails because Handle is not a
numeric type. What implementation are you using?
The underlying object here is a Unix file descriptor, which is just a
number. In that sense, stdin is 0,
On Mon, May 31, 2010 at 12:08 PM, Arie Peterson wrote:
> - I tried using the "regions" package, since it has a very similar
> purpose, but this seems impossible: some resources I could not express in
> the form required for its class 'Resource' (methods 'open' and 'close').
Hi Arie, I would love
On Tuesday 01 June 2010 20:26:55, Jonas Almström Duregård wrote:
> One might expect a == (a/b)*b and other common arithmetic formulas to
> hold for division?
>
> /Jonas
Better not if one's using Float or Double.
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On Tue, Jun 1, 2010 at 7:09 PM, Matthias Kilian wrote:
> - "Liveness" of a library, that is: does it still get updates? Does it
> build with recent versions of GHC?
Note that Hackage already shows the upload date and for which versions
of GHC the package does and doesn't build.
> - Reverse depe
I wrote:
>> I have often generated PostScript from Haskell...
>> Then you convert the PS to PDF using any of the nice
>> utilities around for that
Pierre-Etienne Meunier wrote:
> Isn't there a problem with non-type 1 vectorial fonts being
> rasterized during this conversion ?
No.
PDF is just a s
Hi Kashyap
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 Frown, I find the input
syntax a bit nicer
Dear list,
For some time, I have maintained a small private module centred around the
following type of "resource":
> newtype Resource cap m = Resource { with :: forall a. (cap -> m a) -> m
a }
Interpretation: @Resource cap m@ is a resource, providing a "capability"
of type @cap@, which does ad
One might expect a == (a/b)*b and other common arithmetic formulas to
hold for division?
/Jonas
On 31 May 2010 14:32, Maciej Piechotka wrote:
> I started to wonder what is the difference between div and / so they are
> 2 separate symbols.
>
> div:
> Take a Integral divide and round (down)
>
> (
On Tue, Jun 1, 2010 at 10:25 AM, David Leimbach gmail.com> wrote:
> I'm still trying to figure out what the point of the shootout really is.
>From one point of view - http://shootout.alioth.debian.org/help.php#why
> If there's no dedicated folks working with a language there, trying to
> make
Isn't there a problem with non-type 1 vectorial fonts being rasterized during
this conversion ?
El 01/06/2010, a las 14:07, Yitzchak Gale escribió:
> Jim Tittsler wrote:
>>> What is the easiest way to create PDF files from Haskell?
>
> Pierre-Etienne Meunier wrote:
>> Read the PDF manual from
Permissions issue was straight-forward to resolve.
Yesterday I tracked this down to a conflict with versions of bytestring.
ghc.6.10.4 needs bytestring-0.9.1.4
ghc-pkg: unregistering bytestring-0.9.1.4 would break the following
packages: ha
ddock-2.4.2 ghc-6.10.4 Win32-2.2.0.0 rege
Jim Tittsler wrote:
>> What is the easiest way to create PDF files from Haskell?
Pierre-Etienne Meunier wrote:
> Read the PDF manual from adobe, it is not that hard.
> Fonts are a little harder, but not too much.
I have often generated PostScript from Haskell, which is
much easier. PostScript is
Thanks Stephan,
In Haskell, what would be the right thing to parse "C" like languages.
Parsec literature seems to indicate that they can pretty much parse
anything.
The reason I had asked for a sample in Parselib was for me to understand the
monadic parser in action. The last time I tried looking
On Monday 31 May 2010 23:50:58, Ralph Hodgson wrote:
> Don,
>
>
>
> More angst with Windows 7 permissions. I hope this is a simple thing
> for you or someone else to help me with.
>
>
>
> I have successfully installed other packages into my private cabal area.
>
>
>
> When it came to the Haskell c
Dominic Steintiz wrote:
I seem to be in some sort package dependency hell (which I thought the
Haskell Platform did away with).
I install ghc using my package manager (I'm on opensuse).
I was just thinking, interactions between Cabal and the distribution
package manager could get worse, as s
I started to wonder what is the difference between div and / so they are
2 separate symbols.
div:
Take a Integral divide and round (down)
(/):
Take a Fractional divide and usually round
In some applications I would like to use any of those but it is not
possible. Is this unification taken in
On 2010-05-27, aditya siram wrote:
>> Monstro
> I'm going to call it that from now on. Stay out of the IO Monstro.
Monstro is "Show" (think "demonstrate"), not "Monad".
--
Aaron Denney
-><-
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http:
>
> Don't you want to be installing the curl binding through MinGW's shell
> rather than going back to the Windows shell?
By that I mean the Bash shell provided by MSys, which you should have
installed along with MinGW...
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On 31 May 2010 22:50, Ralph Hodgson wrote:
>
> This is what happened when I went to my windows shell:
>
>
>
> C:\Users\Ralph\AppData\Roaming\cabal\curl-1.3.5>runhaskell setup build
>
> Preprocessing library curl-1.3.5...
>
> Building curl-1.3.5...
>
> Registering curl-1.3.5...
>
>
>
> C:\Users\Ra
Don,
More angst with Windows 7 permissions. I hope this is a simple thing for
you or someone else to help me with.
I have successfully installed other packages into my private cabal area.
When it came to the Haskell curl package, I got permission errors.
Just to prove that thing
Last year, I was playing around with using the Hieroglyph library for pdf
creation via it's Cairo backend (which I guess amounts to the same thing as
using gtk2hs' pdf output).
http://wrwills.webfactional.com/docs/pandocHieroglyph/
You should be able to use Diagrams as well as it also has a cairo
Thanks Bas
I've just emailed Ross, so that should be one "zombie" down when he
has the chance to update Hackage.
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On Tue, Jun 1, 2010 at 5:55 PM, Stephen Tetley wrote:
> What's the procedure for marking one's own package(s) as deprecated on
> Hackage?
Ask Ross Paterson to deprecate your package.
Once a package is deprecated it won't show up in the package list
anymore but will still be available from the p
Hi Brandon
Even that's not simple - freetype is essentially a framework for
writing font processors rather than a conventional C library[*]. Saner
perhaps is to write a C program using freetype to do the exact job you
have in mind, then bind to your C program.
Best wishes
Stephen
[*} Probably w
It responds to pings but not http.
http://downforeveryoneorjustme.com/www.haskell.org
Sean
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2010/6/1 Brandon S. Allbery KF8NH :
> On May 31, 2010, at 19:13 , Don Stewart wrote:
>>
>> I see fairly regular complaints about too many Haskell libraries,
>> bewildering choice of difficult-to-determine quality.
>
> One thing that might help is just a less cluttered/better organized
> interface.
On Jun 1, 2010, at 10:53 , Stephen Tetley wrote:
There probably isn't a library to help - I've looked at extracting
TrueType font metrics myself but abandoned it - TrueType fonts have a
very complicated file format, and the spec is inadequate to code an
The saner way to do this is to write a bi
Hello,
HSP does not use xhtml or any other library internally.
The trhsx pre-processor turns this:
bigTable :: [[Int]] -> String
bigTable t = renderAsHTML $ evalIdentity $
<% mapM (\r -> <% mapM (\d -> <% show d %>) r %>) t %>
into:
bigTable :: [[Int]] -> String
{-# LINE 38 "hsp-bl
Read the PDF manual from adobe, it is not that hard. Fonts are a little harder,
but not too much.
El 01/06/2010, a las 12:14, Henning Thielemann escribió:
>
> On Tue, 1 Jun 2010, Jim Tittsler wrote:
>
>> What is the easiest way to create PDF files from Haskell? Is gtk2hs's
>> PDF output the p
> For instance, the LLVM.FFI.BitReader module has some functions that'll get
> you a ModuleRef from some bitcode.
getBitcodeModuleInContext :: ContextRef -> MemoryBufferRef -> Ptr
ModuleRef -> Ptr CString -> IO Bool
type ModuleRef = Ptr Module
data Module
I'm confused how this works. How
On May 31, 2010, at 19:13 , Don Stewart wrote:
I see fairly regular complaints about too many Haskell libraries,
bewildering choice of difficult-to-determine quality.
One thing that might help is just a less cluttered/better organized
interface. I always have to use browser find on the packa
On Tue, 1 Jun 2010, Jim Tittsler wrote:
What is the easiest way to create PDF files from Haskell? Is gtk2hs's
PDF output the preferred way?
I have successfully used HPDF for
http://hackage.haskell.org/package/internetmarke
Certainly there could be some improvements to HPDF's API interfac
What is the easiest way to create PDF files from Haskell? Is gtk2hs's
PDF output the preferred way?
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cabal installable would be nice. for that matter, throw it on hackage!
2010/5/26 Jinjing Wang :
> Dear list,
>
> As I'm learning frp and reading the wonderful tutorial at
>
> http://www.formicite.com/dopage.php?frp/frp.html
>
> , I'm putting up some more basic cheatsheet style tutorial for myself.
Forked to the Cafe...
Hi all
What's the procedure for marking one's own package(s) as deprecated on Hackage?
Best wishes
Stephen
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Simon Thompson schrieb:
> Has anyone successfully compiled Pugs with GHC 6.12? The Pugs page suggests
> that it compiles, but it falls to link (and therefore build) when I try it.
Your error message would help.
I was able to compile and link pugs (Version: 6.2.13.15)
using ghc-6.12.2.20100521 by
On Tue, Jun 1, 2010 at 10:25 AM, David Leimbach wrote:
> I'm still trying to figure out what the point of the shootout really is. If
> there's no dedicated folks working with a language there, trying to make
> things run faster, a language will come out looking inefficient potentially.
> There's
(apologies if you receive multiple copies)
Dear all,
We would like to announce that the third Ghent Functional Programming Group
Meeting will take place on Tuesday, June 29, in the Technicum Building
(Sint-Pietersnieuwstraat 41, 9000 Gent) of Ghent University at 19h. If you are
interested in g
On Tuesday 01 June 2010 16:58:53, Simon Thompson wrote:
> Has anyone successfully compiled Pugs with GHC 6.12?
$ pugs +RTS --info
[("GHC RTS", "YES")
,("GHC version", "6.12.1")
,("RTS way", "rts_v")
,("Host platform", "i386-unknown-linux")
,("Host architecture", "i386")
,("Host OS", "linux")
That's a great idea and I would love to help but I have no idea where and
how to start. I would love to work on making Haskell installer work on
TakeofGW. Would it be possible to write down some notes describing what
needs to be done?
Thanks,
MH
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Has anyone successfully compiled Pugs with GHC 6.12? The Pugs page suggests
that it compiles, but it falls to link (and therefore build) when I try it.
Thanks!
Simon T.___
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I'm pleased to announce the first public release of berp, version 0.0.2.
Berp is (the beginnings of) an implementation of Python 3, written in
Haskell. It provides a compiler and an interpreter. In both cases the
input Python program is translated into Haskell code. The compiler
turns the Haskell
Hi Gery
There probably isn't a library to help - I've looked at extracting
TrueType font metrics myself but abandoned it - TrueType fonts have a
very complicated file format, and the spec is inadequate to code an
implementation. TeX font metrics are probably simpler but obviously
tied to TeX.
Rea
On Tue, Jun 1, 2010 at 10:30 AM, Gery Debongnie
wrote:
> 3. Perform a reading of the font metrics file in the main program, put
> the results into some FontMetrics object, and give that to stringWidth
> :: FontMetrics -> Font -> String -> Double. Pros : allow me to avoid
> problems of solution 1
Marc Weber schrieb:
> Excerpts from Don Stewart's message of Tue Jun 01 01:13:20 +0200 2010:
>> I see fairly regular complaints about too many Haskell libraries,
>> bewildering choice of difficult-to-determine quality.
>
> I want to send a small reminder that there was the idea adding a public
> w
-- list-extras 0.4.0
A minor (but interface-changing) release for common not-so-common
functions for lists.
-- Changes (since 0.3.0)
-
Excerpts from Don Stewart's message of Tue Jun 01 01:13:20 +0200 2010:
> I see fairly regular complaints about too many Haskell libraries,
> bewildering choice of difficult-to-determine quality.
I want to send a small reminder that there was the idea adding a public
wiki for each project which can
Thanks for writing this package.
I used those functions myself in my usb package:
http://hackage.haskell.org/packages/archive/usb/0.3.1/doc/html/src/System-USB-IO-Synchronous-Enumerator.html#genAlloca
(set you browser to UTF-8 encoding to correctly view the Unicode symbols)
I've now patched usb t
Dear Haskell-Cafe list,
Since I am learning Haskell, I decided to try to do a real program, to
practice and give me some experience. I choose to do a basic
typesetting program (like TeX/LaTeX). Now, obviously, such a program
needs to manipulate font objects, and in particular, font metrics.
Basi
Hello
For non-trivial parsing Parsec or UU-Parse are much better candidates.
If you have Parsec installed from Hackage, I'd still recommend you get
the manual and source distribution from:
http://legacy.cs.uu.nl/daan/parsec.html
The source distribution has some examples - Tiger, Mondrian, Henk
begin Brent Yorgey quotation:
> On Sun, May 30, 2010 at 11:15:40AM -0700, Mike Dillon wrote:
> > begin Michael Snoyman quotation:
> > > http://hackage.haskell.org/packages/archive/base/4.2.0.1/doc/html/Control-Monad.html#v%3AliftM2
> > >
> > > Strangely,
> > > Hayoo didn't turn this one up... anyo
I'm still trying to figure out what the point of the shootout really is. If
there's no dedicated folks working with a language there, trying to make
things run faster, a language will come out looking inefficient potentially.
There's a lot of compile flags and optimizations that can make a differ
Dear Cafe,
let:
> data True
> data False
>
> class C a
(arbitrary instances for C may follow)
Now, how to obtain an "Indicator Type" for C, i.e. a type IndC that is defined
via a type family / fundep / ... , so that
IndC a = True forall a which are instances of C
IndC a = False for all othe
On May 31, 2010, at 3:02 PM, Tom Hawkins wrote:
>> For instance, the LLVM.FFI.BitReader module has some functions that'll get
>> you a ModuleRef from some bitcode.
>
> getBitcodeModuleInContext :: ContextRef -> MemoryBufferRef -> Ptr
> ModuleRef -> Ptr CString -> IO Bool
> type ModuleRef
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
Thoughts?
-- Don
__
Hi,
Is there a not-so-trivial parser implementation with Parselib? Parser for a
"C" like language would be good.
I searched and found Haskell++ ->
http://www.cs.chalmers.se/~rjmh/Software/h++.html
However, I'd prefer to look at a parser for a "C" like language.
--
Regards,
Kashyap
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I hav not run your examples. But
1. May be you have put to couchdb only *object* (braked by {}) but not array?
2. Why not to define data (data Mydata = Mydata {...}) and
declare it as instance of JSON
you can find example of using couchDB via google.com/codesearch
(lang:haskell couchDB)
--
Hey,
I was looking at the reverse-complement benchmark on the Language Shootout,
and among other things, I noticed that the Haskell implementation was using
(filter (/= '\n')) on ByteStrings, and also using lists as queues.
I had a few improvements which using -fasm seem to yield about a 19%
impr
On Thu, May 27, 2010 at 3:17 PM, Mike Dillon wrote:
> begin C. McCann quotation:
>> Personally, I advocate instead using "Sinister" and "Dexter". Nice and
>> catchy, don't you think?
>
> Has anyone done a "translation" of the Prelude into Latin?
>
>> modulus PraeLudus ubi
>>
>> data Uter a b = Sin
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