Hi Stuart,
Data.Bimap is a data structure that represents a bidirectional mapping
between two key types. A bimap has two type parameters; each value in
the bimap is associated with exactly one value of the opposite type.
In other words, it's a bijection between (subsets of) its argument
On 2008-02-03, Bulat Ziganshin [EMAIL PROTECTED] wrote:
Hello Duncan,
Sunday, February 3, 2008, 5:24:22 AM, you wrote:
Ok, so you could create a separate component to produce the .dll / .a
from the C code but you'd prefer the convenience of being able to just:
c-sources: blah.c
and have
Aaron Denney wrote:
On 2008-02-03, Bulat Ziganshin [EMAIL PROTECTED] wrote:
Hello Duncan,
Sunday, February 3, 2008, 5:24:22 AM, you wrote:
Ok, so you could create a separate component to produce the .dll / .a
from the C code but you'd prefer the convenience of being able to just:
On Mon, Feb 4, 2008 at 7:56 PM, Neil Mitchell [EMAIL PROTECTED] wrote:
A few design differences from your one:
* I called my module BiMap rather than Bimap - I debated this with
a collegue, and we settled on the capital M, but it was a very close
call.
Mine was also originally BiMap, but
Am Samstag, 2. Februar 2008 05:53 schrieb Derek Elkins:
I forgot to mention that the Text.Parsec modules should be preferred to
the Text.ParserCombinators.Parsec modules as the Haddock documentation
reveals.
I would have prefered to shorten ParserCombinators to Parsing and leave Parsec
under
A flexible heap implementation supporting min-, max- and custom-ordered
heaps.
New features since version 0.1:
- Foldable and Read instance
- filter, partition
- subrange functions: take, drop, splitAt, takeWhile, span, break
On Feb 4, 2008 12:36 PM, Wolfgang Jeltsch [EMAIL PROTECTED] wrote:
Am Samstag, 2. Februar 2008 14:54 schrieben Sie:
Again, if someone complains about the TH dependency, the aliases could
be generated by TH but saved statically in a module for each release.
Hmm, this could be a compromise
On Sat, 2 Feb 2008, Ben Butler-Cole wrote:
[Resend with formatting maybe fixed.]
Hello
I'm trying to define functions that allow you to traverse a bounded
enumeration, wrapping at the start and the end.
My implementation looks like this:
next, prev :: (Enum a, Bounded a) = a - a
Hello,
I have been trying to build the unix package on RedHat RHEL 5. Over
the weekend I read through the Cabal documentation. The unix-2.2.0.0
unix.cabal specifies the build-type attribute as Configure. Based on
Cabal doc, I should run ./configure. After this step then what? Bottom line
is
Vasili,
On 04/02/2008, at 10:04 PM, Galchin Vasili wrote:
I am reading through the FFI doc. Any suggestions on enabling
Haskell programmers to model ANSI C structs that will be passed down
to C run-time?
The FFI spec is a wonderful document, but is of limited use in
learning to
On Fri, Feb 01, 2008 at 10:19:17PM +, Lennart Augustsson wrote:
It's a matter of taste. I prefer the function composition in this case.
It reads nicely as a pipeline.
(Hoping not to contribute to any flamage...)
I've always liked $ for this kind of code, if you want to keep the
Simon Peyton-Jones wrote:
| Yes, using lots of stack is clearly bad with ghc, but this is a ghc
| bug. In fact the only reason these programs do use lots of stack
| (vs. heap) is just a peculiarity of ghc rts implementation, so it
| really should be ghc that fixes the problem, or at least admits
Problem is that from the idea Functor is a superclass of Monad, with
the
property that fmap == liftM.
[cut]
The second relation can even not be expressed in Haskell 98.
Erm...
class Functor f where
fmap :: (a - b) - f a - f b
class Functor m = Monad m where
return :: a - m a
| Sorry, but if what you say is true then things are even worse than I
| thought :-( This behaviour seems really bad to me, especially for
| concurrent programs.
Which behaviour precisely? Can you say what is wrong and what behaviour you
expect?
S
Am Montag, 4. Februar 2008 13:22 schrieben Sie:
On Feb 4, 2008 12:36 PM, Wolfgang Jeltsch wrote:
[…]
I don't still know how many people would be interested in using the
type-level library so, again, I think it won't hurt to include the
TH-generated aliases and then change it if some non-GHC
Hi
But if a program or library is deliberately designed to
make use of stack (in preference to heap) for efficiency reasons
then this is a source of bugs in otherwise perfectly correct and
reasonable programs.
Can you give an example of a particular library or program, so
everyone can be a
I think it is a bug in the emacs shell mode.
On Feb 4, 2008 9:30 AM, Clifford Beshers [EMAIL PROTECTED] wrote:
No, I cannot reproduce this.
2008/2/4 David Fox [EMAIL PROTECTED]:
I'm seeing the character ^D inserted into argument strings that are
about 256 characters long with GHC 6.8.2.
On Mon, 2008-02-04 at 12:22 -0200, Felipe Lessa wrote:
Hi there,
Reading http://www.haskell.org/haskellwiki/Things_to_avoid I found an
interesting saying:
By the way, in the case of IO monad the Functor class method fmap and
the Monad based function liftM are the same.
I always tought
No, I cannot reproduce this.
2008/2/4 David Fox [EMAIL PROTECTED]:
I'm seeing the character ^D inserted into argument strings that are about
256 characters long with GHC 6.8.2. Anyone else?
Test.hs:
module Main where
import System.Environment
import System.IO
main =
do args -
This is the GNU Multi-Precision library. You have to install that
separately, Cabal can't do that for you. You should use the redhat
package manager to install it. HTH
On Feb 4, 2008 4:43 PM, Galchin Vasili [EMAIL PROTECTED] wrote:
Hi Thomas,
Have you tried to build this package
more specifically the gmp unsatisfied ref shows up with the DynamicLinker.
On 2/4/08, Thomas Schilling [EMAIL PROTECTED] wrote:
I don't know. Maybe someone on @cafe can help. (I CC'd)
On Feb 4, 2008 5:22 PM, Galchin Vasili [EMAIL PROTECTED] wrote:
I have the gmp shared objects installed,
I'm seeing the character ^D inserted into argument strings that are about
256 characters long with GHC 6.8.2. Anyone else?
Test.hs:
module Main where
import System.Environment
import System.IO
main =
do args - getArgs
hPutStrLn stderr (args: ++ show args)
Output:
$ ghc6 --make
I don't know. Maybe someone on @cafe can help. (I CC'd)
On Feb 4, 2008 5:22 PM, Galchin Vasili [EMAIL PROTECTED] wrote:
I have the gmp shared objects installed, i.e. .so's. Does ghc require static
linking with .a archive files?
On 2/4/08, Thomas Schilling [EMAIL PROTECTED] wrote:
This
Hi,
I'm sorry it took me so long to respond!
[EMAIL PROTECTED] wrote:
[newtype Ord a = Reverse a = Reverse { unReverse :: a }]
This solution should be used for all collections depending on Ord
instances, including Data.Map, Data.Set and others. As long as I only
include it in my tiny heap
Am Samstag, 2. Februar 2008 14:54 schrieben Sie:
On Feb 1, 2008 10:32 PM, Wolfgang Jeltsch wrote:
Am Freitag, 1. Februar 2008 13:00 schrieb Alfonso Acosta:
[…]
To make it friendlier for the end user I thought about defining
aliases for lets say the first 1 numbers using Template
Hello Simon,
Simon Peyton-Jones wrote:
| Sorry, but if what you say is true then things are even worse than I
| thought :-( This behaviour seems really bad to me, especially for
| concurrent programs.
Which behaviour precisely? Can you say what is wrong and what behaviour you
expect?
Hi,
I've just tried using Haskore (I use Ubuntu
and GHC), with no success. Since Haskore was
started a long time ago, but it's not yet
cabalized, and the author's page can not be
reached, I can't say for sure if it's still
maintained. Does anybody know?
Thanks,
Maurício
On 2/4/08, Galchin Vasili [EMAIL PROTECTED] wrote:
Hello,
I am reading through the FFI doc. Any suggestions on enabling
Haskell programmers to model ANSI C structs that will be passed down to C
run-time?
Maybe this could offer some help http://therning.org/magnus/archives/315
/M
On Feb 4, 2008 12:11 PM, Wolfgang Jeltsch [EMAIL PROTECTED] wrote:
Am Samstag, 2. Februar 2008 05:53 schrieb Derek Elkins:
I forgot to mention that the Text.Parsec modules should be preferred to
the Text.ParserCombinators.Parsec modules as the Haddock documentation
reveals.
I would have
On Mon, 4 Feb 2008, Felipe Lessa wrote:
Hi there,
Reading http://www.haskell.org/haskellwiki/Things_to_avoid I found an
interesting saying:
By the way, in the case of IO monad the Functor class method fmap and
the Monad based function liftM are the same.
I always tought that
prop ::
Hi
First bad thing:
Stack size (memory consumed) doubles each time it overflows.
Bad thing? Assume that allocating memory takes some constant amount of
time, such as invoking overflow behaviour etc. To get the size of the
stack to n bytes with doubling takes O(log n), to get it there with a
Am Montag, 4. Februar 2008 20:44 schrieben Sie:
I'll host the project in community.haskell.org, do you have an account
there?
Now, I haven't. :-(
Well, you can request one at
http://community.haskell.org/admin/account_request.html if you want
Otherwise I'll take the maintainer role.
On Feb 4, 2008 8:27 PM, Wolfgang Jeltsch [EMAIL PROTECTED] wrote:
Am Montag, 4. Februar 2008 13:22 schrieben Sie:
I don't still know how many people would be interested in using the
type-level library so, again, I think it won't hurt to include the
TH-generated aliases and then change it if
Hi there,
Reading http://www.haskell.org/haskellwiki/Things_to_avoid I found an
interesting saying:
By the way, in the case of IO monad the Functor class method fmap and
the Monad based function liftM are the same.
I always tought that
prop :: (Functor m, Monad m, Eq (m b)) = (a - b) - m a -
Hello,
I am reading through the FFI doc. Any suggestions on enabling Haskell
programmers to model ANSI C structs that will be passed down to C run-time?
Vasili
___
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
On Monday 04 February 2008, Adrian Hey wrote:
Yikes!
Also, I can't help thinking that the common justification for the
current limit (that it helps find alleged bugs) is a little lame.
It only helps find bugs if one expects ones program to use less than
8M of stack (hence if it's using more,
On 2008.02.04 16:11:55 -0200, Maurício [EMAIL PROTECTED] scribbled 0.3K
characters:
Hi,
I've just tried using Haskore (I use Ubuntu
and GHC), with no success. Since Haskore was
started a long time ago, but it's not yet
cabalized, and the author's page can not be
reached, I can't say for
On Monday 04 February 2008, Neil Mitchell wrote:
Hi
That would be nice. But its only beneficial if there are programs
which takes large amounts of stack at some point, but then shrink down
to very little stack and continue for a reasonable amount of time.
From the 'when I was a lad'
On 04/02/2008, Philip Armstrong [EMAIL PROTECTED] wrote:
I've always liked $ for this kind of code, if you want to keep the
arguments around:
next xs = runCont $ sequence $ map Cont xs
seems quite natural to me.
I'd probably write that as
nest xs = runCont . sequence . map Cont $ xs
On Mon, 2008-02-04 at 17:18 -0500, bbrown wrote:
Is there a way to pass misc options to the cabal, ghc process.
I tried the following:
extra-libraries: sqlite3
extra-lib-dirs: C:\cygwin\lib
include-dirs:C:\cygwin\usr\include
ghc-options:
On Mon, 4 Feb 2008 14:24:12 -0800, Don Stewart wrote
bbrown:
Is there a way to pass misc options to the cabal, ghc process.
I tried the following:
extra-libraries: sqlite3
extra-lib-dirs: C:\cygwin\lib
include-dirs:C:\cygwin\usr\include
ghc-options:
Is there a way to pass misc options to the cabal, ghc process.
I tried the following:
extra-libraries: sqlite3
extra-lib-dirs: C:\cygwin\lib
include-dirs:C:\cygwin\usr\include
ghc-options: -mno-cygwin
runhaskell Setup.lhs build --ghc-options=-mno-cygwin
Neil Mitchell wrote:
Hi
First bad thing:
Stack size (memory consumed) doubles each time it overflows.
Bad thing? Assume that allocating memory takes some constant amount of
time, such as invoking overflow behaviour etc. To get the size of the
stack to n bytes with doubling takes O(log n), to
On Mon, Feb 04, 2008 at 10:50:13AM -0600, Galchin Vasili wrote:
more specifically the gmp unsatisfied ref shows up with the DynamicLinker.
This works for me, with GHC 6.8.2 and
http://hackage.haskell.org/packages/archive/unix/2.2.0.0/unix-2.2.0.0.tar.gz
$ ghc --make Setup
$ ./Setup configure
Hi folks
I'm thinking of writing a little essay arguing the case for the
advantages of FP for producing quality software. Can the list
recommend any papers/articles which I can use as sources of my
argument? I have access to the IEEE database too although earlier I
couldn't find anything on
bbrown:
Is there a way to pass misc options to the cabal, ghc process.
I tried the following:
extra-libraries: sqlite3
extra-lib-dirs: C:\cygwin\lib
include-dirs:C:\cygwin\usr\include
ghc-options: -mno-cygwin
runhaskell Setup.lhs build
On 2/4/08, PR Stanley [EMAIL PROTECTED] wrote:
Hi folks
I'm thinking of writing a little essay arguing the case for the
advantages of FP for producing quality software. Can the list
recommend any papers/articles which I can use as sources of my
argument? I have access to the IEEE database too
Thanks, keep the tips coming. I like the ones about the type safety
and line counts.
Cheers,
Paul
At 23:33 04/02/2008, you wrote:
Good luck with this - I'd love to see the outcome.
My experience is that FP tends to result in a lot less code, so if
there are x
bugs per line of code, FP has
On Mon, 4 Feb 2008 17:27:30 -0500, bbrown wrote
On Mon, 4 Feb 2008 14:24:12 -0800, Don Stewart wrote
bbrown:
Is there a way to pass misc options to the cabal, ghc process.
I tried the following:
extra-libraries: sqlite3
extra-lib-dirs: C:\cygwin\lib
Hi Ian,
I am trying to add new Posix functionality and it would be nice to be
able to build unix myself. In any case, I will try your suggestion and see
what happens.
Regards, Vasili
On 2/4/08, Ian Lynagh [EMAIL PROTECTED] wrote:
On Mon, Feb 04, 2008 at 10:50:13AM -0600, Galchin Vasili
On Sun, 2008-02-03 at 19:38 -0200, Felipe Lessa wrote:
On Feb 3, 2008 6:42 PM, mgsloan [EMAIL PROTECTED] wrote:
Would this be suitable for a text editor?
Note that we already have a binding to GtkSourceView, see
http://www.haskell.org/gtk2hs/docs/current/Graphics-UI-Gtk-SourceView.html
On Mon, 2008-02-04 at 16:56 -0500, Cale Gibbard wrote:
On 04/02/2008, Philip Armstrong [EMAIL PROTECTED] wrote:
I've always liked $ for this kind of code, if you want to keep the
arguments around:
next xs = runCont $ sequence $ map Cont xs
seems quite natural to me.
I'd
On 4 Feb 2008, at 6:22 AM, Felipe Lessa wrote:
Hi there,
Reading http://www.haskell.org/haskellwiki/Things_to_avoid I found an
interesting saying:
By the way, in the case of IO monad the Functor class method fmap and
the Monad based function liftM are the same.
I always tought that
prop ::
On Sun, 3 Feb 2008, Antoine Latter wrote:
Another picky nit:
The monad transformer type is defined as such:
data ParsecT s u m a
= ParsecT { runParsecT :: State s u - m (Consumed (m (Reply s u
a))) }
with the Consumed and reply types as:
data Consumed a = Consumed a
On Feb 4, 2008 9:11 PM, Philippa Cowderoy [EMAIL PROTECTED] wrote:
It's a necessary part of how Parsec works - both the Consumed and the
Reply depend on the input stream, which is now generated from within the
base monad. The Consumed result is evaluated in advance of the Reply, so
keeping the
On Mon, Feb 04, 2008 at 10:13:12PM +, Adrian Hey wrote:
Also
remember that this behaviour never wastes more than 50% of the stack,
which is a relatively small amount.
Only if the stack is relatively small. Would you say the same about
heap, or about a stack that only needed 50% of heap
I've updated the bimap package to version 0.2.
http://hackage.haskell.org/cgi-bin/hackage-scripts/package/bimap-0.2
The main difference is a pretty comprehensive interface shakeup: the
Either variants have been dropped, all L variants have had the L
removed from their name, and a few functions
On Feb 4, 2008 5:55 PM, Duncan Coutts [EMAIL PROTECTED] wrote:
On Mon, 2008-02-04 at 17:18 -0500, bbrown wrote:
Is there a way to pass misc options to the cabal, ghc process.
I tried the following:
extra-libraries: sqlite3
extra-lib-dirs: C:\cygwin\lib
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