On Thu, May 27, 2010 at 3:17 PM, Mike Dillon m...@embody.org 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 =
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%
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)
A (hopefully) non-cropped version of the chart, http://tinyurl.com/2cl42js
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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
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
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 = Ptr
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 other a.
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
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
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
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.
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
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
-- list-extras 0.4.0
A minor (but interface-changing) release for common not-so-common
functions for lists.
-- Changes (since 0.3.0)
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
wiki for
On Tue, Jun 1, 2010 at 10:30 AM, Gery Debongnie
gery.debong...@gmail.com 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
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.
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
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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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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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)
,(Host vendor,
(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
On Tue, Jun 1, 2010 at 10:25 AM, David Leimbach leim...@gmail.com 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
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:
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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cabal installable would be nice. for that matter, throw it on hackage!
2010/5/26 Jinjing Wang nfjinj...@gmail.com:
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
What is the easiest way to create PDF files from Haskell? Is gtk2hs's
PDF output the preferred way?
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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
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
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 does
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
Hello,
HSP does not use xhtml or any other library internally.
The trhsx pre-processor turns this:
bigTable :: [[Int]] - String
bigTable t = renderAsHTML $ evalIdentity $
table
% mapM (\r - tr% mapM (\d - td% show d %/td) r %/tr) t %
/table
into:
bigTable :: [[Int]] - String
{-#
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
2010/6/1 Brandon S. Allbery KF8NH allb...@ece.cmu.edu:
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
It responds to pings but not http.
http://downforeveryoneorjustme.com/www.haskell.org
Sean
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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
On Tue, Jun 1, 2010 at 5:55 PM, Stephen Tetley stephen.tet...@gmail.com 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
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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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
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
On 31 May 2010 22:50, Ralph Hodgson rhodg...@topquadrant.com wrote:
This is what happened when I went to my windows shell:
C:\Users\Ralph\AppData\Roaming\cabal\curl-1.3.5runhaskell setup build
Preprocessing library curl-1.3.5...
Building curl-1.3.5...
Registering curl-1.3.5...
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 2010-05-27, aditya siram aditya.si...@gmail.com 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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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
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
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 curl package,
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
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 a
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
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 adobe,
On Tue, Jun 1, 2010 at 10:25 AM, David Leimbach leimy2k at 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
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 uzytkown...@gmail.com wrote:
I started to wonder what is the difference between div and / so they are
2 separate symbols.
div:
Take a Integral divide and
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
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
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
On Tue, Jun 1, 2010 at 7:09 PM, Matthias Kilian k...@outback.escape.de 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
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 Mon, May 31, 2010 at 12:08 PM, Arie Peterson ar...@xs4all.nl 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
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,
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,
like
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).
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\Ralphcabal install parsec
Resolving dependencies...
Configuring parsec-2.1.0.1...
Preprocessing
On Tue, Jun 1, 2010 at 12:40 PM, Cory Knapp cory.m.kn...@gmail.com 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
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 21:08,
On Tue, Jun 1, 2010 at 3:40 PM, Cory Knapp cory.m.kn...@gmail.com 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
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 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/c) == round
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) == round
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? How would it
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 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. Which
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 combinators
[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
#-
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 help,
On Tue, 1 Jun 2010 21:10:40 +0200, Bas van Dijk v.dijk@gmail.com
wrote:
| [...]
| Hi Arie, I would love to see some examples of these resources for
| which you can't define a Resource[1] instance.
| [...]
|
| [1]
|
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, 17:05:16)
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:
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 difference.
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