Am Donnerstag 15 April 2010 00:52:22 schrieb Jason Dagit:
The bad version, ghc --make NonTermination.hs:
\begin{code}
{-# OPTIONS -O2 #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
-- Note: Change the optimization to -O1 to get a terminating version
Doesn't seem to terminate with -O1 here
Am Donnerstag 15 April 2010 05:38:23 schrieb Jason Dagit:
On Tue, Apr 13, 2010 at 3:47 AM, Erik de Castro Lopo
mle...@mega-nerd.commle%2...@mega-nerd.com
wrote:
Daniel Fischer wrote:
Am Dienstag 13 April 2010 09:29:18 schrieb Erik de Castro Lopo:
Anyone else have the same problem
Am Donnerstag 15 April 2010 19:19:15 schrieb Romulus:
Hello everyone,
I'm stuck with the definition of the helper for LAnd'. I expect :
land' :: ((LAnd' p) :: (f p)) = Mu (f p) - Mu (f p) - Mu (f p)
land' = \x y - inject (LAnd' x y)
... but ghci 6.10.4 does not really like this
Am Freitag 16 April 2010 11:28:54 schrieb Phyx:
Hi all,
I'm having a rather weird problem,
Ghc-pkg list shows a package installed but doing a ghc -make will give
an error saying that It can't find a module that's supposed to be in the
installed package.
And cabal install always
Am Freitag 16 April 2010 14:06:16 schrieb Phyx:
(sorry for the duplication, forgot to reply to the mailing list too)
Well, I did, I've completely unregistered the package,
Did a check and recache, both completed with no problem.
In detail what's happening is, I'm building a tool that
Am Freitag 16 April 2010 15:06:55 schrieb Phyx:
I'm using cabal install,
$ ghc --make -O2 WinDll
WinDll\Lib\NativeMapping.hs:51:18:
Could not find module `Language.Haskell.Exts':
Use -v to see a list of the files searched for.
Is the error message I get when I try to just
Am Freitag 16 April 2010 15:40:38 schrieb Phyx:
For the first part
$ cat foo.hs
module Main (main) where
import Language.Haskell.Exts
main :: IO ()
main = print $ readExtensions BangPatterns
$ ghc --make foo.hs
foo.hs:3:8:
Could not find module `Language.Haskell.Exts':
Use
Am Freitag 16 April 2010 17:41:06 schrieb John Lato:
From: Mathieu Boespflug mb...@tweag.net
Dear haskell-cafe,
I implemented the Floyd Warshall algorithm for finding the shortest
path in a dense graph in Haskell, but noted the performance was
extremely poor compared to C. Even using
Am Freitag 16 April 2010 19:11:13 schrieb Keith Sheppard:
Sorry, I forgot to add my ghc version is 6.10.1 on OSX
k...@catskill:~/projects/ ghc --version
The Glorious Glasgow Haskell Compilation System, version 6.10.1
On Fri, Apr 16, 2010 at 1:08 PM, Keith Sheppard keiths...@gmail.com
wrote:
Am Freitag 16 April 2010 20:50:25 schrieb Brian Hulley:
revealed a link to a US Patent (7120900) for the idea of implementing
the Unicode Bidirectional Algorithm (UAX #9
http://www.unicode.org/reports/tr9) in Haskell, making use, as far as I
can tell, of nothing more than the normal approach
Am Samstag 17 April 2010 14:41:28 schrieb Simon Peyton-Jones:
I have not been following the details of this, I'm afraid, but I notice
this:
forever' m = do _ - m
forever' m
When I define that version of forever, the space leak goes away.
What was the old version of
Am Samstag 17 April 2010 19:14:02 schrieb Limestraël:
Hello,
Well, here comes the trouble:
GameStructs.hs:16:9:
Functional dependencies conflict between instance declarations:
instance (Binary a) = Binarizable a a
-- Defined at MagBots/GameStructs.hs:16:9-37
Am Samstag 17 April 2010 22:01:23 schrieb Limestraël:
Yes! Sorry, I forgot a bit:
Binary types are automatically made instances of
Binarizable/Unbinarizable (that's my line 16):
instance (Binary a) = Binarizable a a where
toBinary = id
instance (Binary a, Monad m) = Unbinarizable a a m
Am Sonntag 18 April 2010 00:02:52 schrieb Chris Dornan:
Hi Everyone,
I am trying to get cabal-install to work on a system in which /tmp is
mounted noexec. Is there any way to configure it to use another
directory?
cabal-install gets its temporary directory via
Am Samstag 17 April 2010 22:11:05 schrieb Bertram Felgenhauer:
Daniel Fischer wrote:
Am Samstag 17 April 2010 14:41:28 schrieb Simon Peyton-Jones:
I have not been following the details of this, I'm afraid, but I
notice
this:
forever' m = do _ - m
forever' m
Am Sonntag 18 April 2010 01:23:07 schrieb Ben Millwood:
On Sat, Apr 17, 2010 at 9:50 PM, Daniel Fischer
daniel.is.fisc...@web.de wrote:
{-# LANGUAGE OverlappingInstances, [...]
but with caution:
quicksilver using OverlappingInstances is the haskell equivalent of
buying a new car
Am Sonntag 18 April 2010 02:05:30 schrieb Bertram Felgenhauer:
Which is
always = \a_aeO - let k_sYz = always a_aeO
in a_aeO k_sYz
specialised to IO, and with () inlined.
Where is the knot?
Nowhere. Got confused by all the a_aAe and `cast` (GHC.Types...).
Am Sonntag 18 April 2010 20:59:25 schrieb Neil Mitchell:
Hi,
I thought this thread suggested that a cabal install wx would now
work?
It does, as far as I can tell.
I just tried it and got:
...
generated 2439 constant definitions
ok.
setup.exe: wx-config: does not exist
That's not our
Am Sonntag 18 April 2010 21:41:06 schrieb Daniel Fischer:
wx-config should have been installed as part of the wxWidgets package.
Is that not included in the windows-installer of wxWidgets?
Seems it's not so.
http://www.haskell.org/haskellwiki/WxHaskell/Building says
Windows users should also
Am Montag 19 April 2010 01:03:14 schrieb Arnoldo Muller:
Hello all:
I want to generate some hamming distance statistics about a set of
strings. As explained in another e-mail in this list, I used the
following code to call the
functions:
(exampl holds the list of strings of size w)
filter
Am Montag 19 April 2010 14:13:53 schrieb Heinrich Apfelmus:
Arnoldo Muller wrote:
I want to generate some hamming distance statistics about a set of
strings.
filter (\x - x /= 0) $
map (uncurry hammingX) [(xs, ys) | xs - exampl, ys - exampl]
[...]
-- function posted in
Am Montag 19 April 2010 14:37:33 schrieb John Lato:
Is it really necessary to use Strings? I think a packed type, e.g.
Vector or ByteString, would be much more efficient here.
Not very much if the strings are fairly short (and the list isn't too long,
so there's not a big difference in
am
still unable to find the source of my memory leak.
Allocation as such is not a problem, resident memory is the important
thing.
Try heap profiling to see what holds on to memory (+RTS -hc would be a good
first run).
Regards,
Arnoldo
On Mon, Apr 19, 2010 at 3:47 PM, Daniel Fischer
) [(xs, ys) | xs -
exampl, ys - exampl]
filter (/= 0) [hamming xs ys | xs - example, ys - example]
And of course, you can trivially avoid half of the work.
Best Regards,
Arnoldo Muller
On Mon, Apr 19, 2010 at 3:18 AM, Daniel Fischer
daniel.is.fisc...@web.dewrote:
Am Montag 19 April
Am Dienstag 20 April 2010 18:59:23 schrieb C K Kashyap:
Hi Ivan,
I tried doing
cabal install parsec = 3 --reinstall --enable-library-profiling
This complained about bytestring ... so I did this -
cabal install bytestring --reinstall --enable-library-profiling
And this complained about
Am Sonntag 25 April 2010 06:34:32 schrieb mitch...@kaplan2.com:
Luke already explained the type error, so I'll focus on the implementation.
Hi,
I'm just starting to learn, or trying to learn Haskell. I want to write
a function to tell me if a number's prime. This is what I've got:
f
Am Sonntag 25 April 2010 17:49:05 schrieb mitch...@kaplan2.com:
Hi David,
Thanks for the suggestion. I took a quick look at your article, and
I'll have to spend a little more time on it. Delicious Primes? Great
name.
And it's a good read.
I find this definition of prime numbers
Am Montag 26 April 2010 13:36:22 schrieb Ivan Lazar Miljenovic:
So, the problem is that there are broken links _in Hoogle_;
No, hoogle just sends you to
http://www.haskell.org/ghc/docs/6.12.2/html/libraries/base-4.2.0.1/Prelude.html#t%3AIO
, which does exist. It's the 'Source' link in the
Am Montag 26 April 2010 14:15:40 schrieb Bjorn Buckwalter:
Dear all,
Does it make good sense that 'and []' returns 'True' and 'or []'
returns 'False'? The Haskell Road to Logic, Maths and Programming says
so:
The function or takes a list of truth values and returns True if at
least one
Am Montag 26 April 2010 14:32:03 schrieb Bjorn Buckwalter:
So what would be the fix, to set an upper bound on base? Is the
general recommendation that all packages should specify upper bounds
on all dependencies (if so why doesn't Cabal tell us?)?
Yes, that's the general recommendation.
Am Montag 26 April 2010 15:15:03 schrieb Ivan Lazar Miljenovic:
Daniel Fischer daniel.is.fisc...@web.de writes:
Am Montag 26 April 2010 13:36:22 schrieb Ivan Lazar Miljenovic:
So, the problem is that there are broken links _in Hoogle_;
No, hoogle just sends you to
http://www.haskell.org
Am Montag 26 April 2010 18:15:02 schrieb Ozgur Akgun:
Hi all,
If I have the following data type:
data Expr = Num Int | Expr :+: Expr | Expr :-: Expr
Haddock handles the infix constructors, and generates a very nice output
(html in this case)
However when I try to reference to one of the
Am Montag 26 April 2010 19:52:23 schrieb Thomas van Noort:
Hello all,
I'm having difficulties understanding rank-2 polymorphism in combination
with overloading. Consider the following contrived definition:
f :: (forall a . Eq a = a - a - Bool) - Bool
f eq = eq True True
Then, we pass f
Am Montag 26 April 2010 22:05:48 schrieb Ozgur Akgun:
So, how can we make use of this fix?
My guess:
$ cabal install haddock-2.7.2
___
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
http://www.haskell.org/mailman/listinfo/haskell-cafe
Am Montag 26 April 2010 22:23:42 schrieb Gregory Collins:
Alexander Solla a...@2piix.com writes:
On Apr 26, 2010, at 12:30 PM, Jeremy Shaw wrote:
Does trying to install hsp-0.5.1 work any better?
I hadn't tried it, since it forces hsx-0.7 to install. But I gave it
a shot, and it fails
Am Donnerstag 29 April 2010 20:08:00 schrieb Ben:
A technical question: it seems like the instance of ArrowLoop is too
strict (this is something I've wondered about in Liu's paper too.)
Shouldn't it be
instance ArrowLoop SFAuto where
loop (SFAuto s f) = SFAuto s f'
where
Am Freitag 30 April 2010 17:23:19 schrieb Antoine Latter:
On Fri, Apr 30, 2010 at 3:37 AM, Daniel Fischer
daniel.is.fisc...@web.de wrote:
Am Donnerstag 29 April 2010 20:08:00 schrieb Ben:
A technical question: it seems like the instance of ArrowLoop is too
strict (this is something I've
Am Freitag 30 April 2010 22:37:38 schrieb Thomas Hartman:
*Main :t Data.Text.IO.readFile
Data.Text.IO.readFile :: FilePath - IO T.Text
but
*Main :t Data.Text.Lazy.IO.readFile
Data.Text.Lazy.IO.readFile
:: FilePath - IO text-0.7.1.0:Data.Text.Lazy.Internal.Text
Hmm,
Prelude :t
Am Freitag 30 April 2010 23:20:59 schrieb Edward Kmett:
On Fri, Apr 30, 2010 at 5:09 PM, Daniel Fischer
daniel.is.fisc...@web.dewrote:
and how can I get from internal type to regular type when using
Data.Text?
Use id :: a - a
;)
Not quite, there is still a distinction between
Am Samstag 01 Mai 2010 00:26:26 schrieb Bryan O'Sullivan:
On Fri, Apr 30, 2010 at 3:14 PM, Daniel Fischer
daniel.is.fisc...@web.dewrote:
Yes, I understood it so that he wanted to convert from
Data.Text.Lazy.Internal.Text to Data.Text.Lazy.Text.
It's the same type.
That's why I suggested
Am Samstag 01 Mai 2010 00:58:23 schrieb Felipe Lessa:
It depends on what is on your scope:
Prelude :t Data.Text.Lazy.IO.readFile
Data.Text.Lazy.IO.readFile
:: FilePath - IO text-0.7.1.0:Data.Text.Lazy.Internal.Text
Prelude :m Data.Text.Lazy
Prelude Data.Text.Lazy :t
Am Samstag 01 Mai 2010 13:16:55 schrieb Limestraël:
Hello Café,
When I was trying to cabal-install haskell-src, I came up with:
cabal: The program happy is required but it could not be found
However, the happy package was actually installed and the 'happy'
executable was in ~/.cabal/bin
Am Samstag 01 Mai 2010 19:06:33 schrieb Warren Harris:
On May 1, 2010, at 3:39 AM, Daniel Fischer wrote:
Try
$ cabal install --constraint=Crypto4.2.1 --
constraint=HJScript0.5
happs-tutorial
This had the same problem building containers:
Building containers-0.2.0.1...
Data
Am Sonntag 02 Mai 2010 22:26:43 schrieb Brandon S. Allbery KF8NH:
On May 2, 2010, at 05:33 , Limestraël wrote:
Yes, it's weird, but it works! Thanks.
It's normal, actually. ~ is only understood by the shell, so unless
the shell is invoked to expand it a program will fail to understand
it.
Am Montag 03 Mai 2010 00:28:31 schrieb Ivan Lazar Miljenovic:
Daniel Fischer daniel.is.fisc...@web.de writes:
If the default shell is bash and the PATH is set and exported in
~/.bashrc, it should work with '~' unless the string is quoted,
shouldn't it? bash expands the tildes when
On Montag 03 Mai 2010 02:12:20, Ivan Miljenovic wrote:
On 3 May 2010 08:49, Daniel Fischer daniel.is.fisc...@web.de wrote:
Am Montag 03 Mai 2010 00:28:31 schrieb Ivan Lazar Miljenovic:
bash expands it when you use it within bash, but when it's used
within another program this might
On Montag 03 Mai 2010 02:34:51, Ivan Miljenovic wrote:
This is on my ubuntu box at uni:
iv...@feitpc02 ~ $export DUMMY=~/bin:~/cabal
You put quotes around the string, that means tildes aren't expanded
($VARIABLEs still are:
da...@linux-mkk1:~/Haskell export
On Montag 03 Mai 2010 19:58:54, Han Joosten wrote:
Hi all
Then, again i tried 'runhaskell setup.hs configure', but this failed
again with exactly the same message as before. It seems that all
packages that I installed dissapeared!
I think it's the fact that cabal-install by default does
On Montag 03 Mai 2010 21:40:13, Stanislav Chernichkin wrote:
I think it would be nice if someone will write an article on
Haskell Wiki on building regex-posix, but my English is not
good enough for such things.
You could start the article nevertheless and let others polish the English
then.
I
On Mittwoch 05 Mai 2010 00:55:38, Maciej Piechotka wrote:
I try to configure happstack with parsec 3.1. It seems to fail due to
cabal:
happstack-util.cabal says parsec 3, so --constraint=parsec 3 and the
given dependencies are incompatible, hence it can't be configured.
Probably parsec 3
On Wednesday 05 May 2010 01:45:29, Maciej Piechotka wrote:
I updated local copy, as shown, but cabal wants to rebuild it anyway. My
question was rather why the repo is considered at all when the package
is installed.
Regards
Okay, I didn't quite understand your question, sorry.
So, what's
On Wednesday 05 May 2010 15:45:38, Henning Thielemann wrote:
Maciej Piechotka schrieb:
On Wed, 2010-05-05 at 01:09 +0200, Daniel Fischer wrote:
On Mittwoch 05 Mai 2010 00:55:38, Maciej Piechotka wrote:
I try to configure happstack with parsec 3.1. It seems to fail due
to cabal
On Wednesday 05 May 2010 23:05:10, Eugeny N Dzhurinsky wrote:
Hello!
I need to submit data to HTTP server using UTF8 encoding. I found out
that libcurl for haskell can work with Data.ByteString - but it seems
not able to work with Data.ByteString.UTF8.
Can you please advice, how do I
On Wednesday 05 May 2010 23:36:26, Limestraël wrote:
but you will not object if I say that scheme is quicker to learn
than Haskell.
Well, I do object. Learning Haskell went like a breeze (not to perfection,
but well enough). Only Python was nearly as easy and quick to learn.
Learning Lisp
On Thursday 06 May 2010 16:32:50, Limestraël wrote:
^^
That's an interesting debate: How do you imagine the future programming
languages?
But not today's topic.
It's strange that, since Lisp is still used now, especially for teaching
purposes, and since everybody complains about
On Thursday 06 May 2010 17:02:59, Iæfai wrote:
I have an lhs file, 'starsystem.lhs' that is not compiling because of
a parse error.
I cannot figure out what the problem here is.
Apparently, unlit doesn't manage to cope with mixed LaTeX and bird-track.
On Thursday 06 May 2010 17:35:58, Daniel Fischer wrote:
Apparently, unlit doesn't manage to cope with mixed LaTeX and
bird-track.
Ah, overlooked
The program text is recovered by taking only those lines beginning with
, and replacing the leading with a space. Layout and comments apply
exactly
On Friday 07 May 2010 03:15:19, Maciej Piechotka wrote:
On Thu, 2010-05-06 at 23:46 +0200, Daniel Fischer wrote:
Share.share :: GHC.Types.Int
GblId
[Str: DmdType]
Share.share =
case GHC.List.$wlen @ GHC.Integer.Type.Integer Share.share_a 0
of ww_amc { __DEFAULT -
GHC.Types.I
On Friday 07 May 2010 16:15:41, Daniel Fischer wrote:
b) using Don Stewart's ghc-core (http://hackage.haskell.org/package/ghc-
core), e.g. ghc.core -f html -- -O2 Source.hs Source.html
And of course, the html backend of ghc-core was removed with version 0.5 :(
If you want html output,
$ cabal
On Friday 07 May 2010 17:05:08, Dupont Corentin wrote:
Hello,
i'm still struggling with ghci and accents.
Prelude é
\233
That uses the Show instance of Char, which escapes all characters greater
than '\127' ('\DEL'), so that's no problem, jut inconvenient.
I've installed GHC 6.12.1,
On Wednesday 12 May 2010 21:53:41, Martin Hilbig wrote:
hi,
since i got no answer from the maintainer, maybe someone else can take
care of it, or at least point out, what i did wrong.
so, i recently stumbled upon some error while using Text.JSON 0.4.3 [1]:
On Thursday 13 May 2010 20:43:44, Eugeny N Dzhurinsky wrote:
On Thu, May 13, 2010 at 07:14:25PM +0100, Stephen Tetley wrote:
Hi Eugene
Is something like this close to what you want:
Not really. First of all, there're many properties, not 3. So it may end
up with plenty of support
On Thursday 13 May 2010 21:28:21, Aran Donohue wrote:
I have an accept-loop:
do (conn, _saddr) - accept sock
forkIO $ initializeConnection conn
Which allocates memory iff accept allocates, I suppose. To test the
theory, is there a way I can force an allocation that won't get
optimized
On Friday 14 May 2010 15:32:10, Bulat Ziganshin wrote:
Hello Julian,
Friday, May 14, 2010, 4:18:42 PM, you wrote:
Now, if I type
3 + 4
it does not work, and i really don't understand why. If i ask GHCi
for 3's type ($ :t 3) it will answer 3 :: (Prelude.Num t) = t.
But, if 3 and 4
On Saturday 15 May 2010 02:53:43, Brandon S. Allbery KF8NH wrote:
On May 14, 2010, at 20:24 , Brandon Simmons wrote:
The other baffling thing is this: if the debugging line 426 is
uncommented, then even running:
$ runghc Befunge.hs --quiet mycology.b98
...will fail. But all we're
On Saturday 15 May 2010 15:18:28, Brandon Simmons wrote:
On May 14, 2010, at 20:24 , Brandon Simmons wrote:
The other baffling thing is this: if the debugging line 426 is
uncommented, then even running:
$ runghc Befunge.hs --quiet mycology.b98
...will fail. But all we're doing is a
On Sunday 16 May 2010 18:13:30, Eugene Dzhurinsky wrote:
On Sun, May 16, 2010 at 06:56:58PM +0300, Roman Cheplyaka wrote:
I assume you are using GHC 6.12. The trouble is in conversion done
by putStrLn. Use one from System.IO.UTF8.
Or try to upgrade to GHC 6.12 which respects the locale
On Tuesday 18 May 2010 21:49:50, R J wrote:
Newbie trying to get through Bird. Could someone provide a clean
solution, with proof (so I can see how these proofs are laid out), to
this: Given:
f :: Integer - Integer
g :: Integer - (Integer - Integer)
h :: ...
h x y = f (g x y)
Questions:
On Wednesday 19 May 2010 19:46:57, Ralph Hodgson wrote:
Forgot to add: I now need to understand the following warnings on this
line import Text.HTML.Download:
In Text.HTML.Download, there's the following:
{-|
/DEPRECATED/: Use the HTTP package instead:
import Network.HTTP
On Thursday 20 May 2010 15:49:59, Roly Perera wrote:
Hi,
I'm looking for a simple way to rewrite strings according to simple
composable rules like:
replace _ by \\(\\hole\\)
replace -n where n matches an integer by ^{n}
so that I can import some pretty-printed output into a LaTeX alltt
On Thursday 20 May 2010 16:34:17, Carlos Camarao wrote:
In the context of MPTCs, this rule alone is not enough. Consider, for
example (Example 1):
class F a b where f:: a-b
class O a where o:: a
and
k = f o:: (C a b,O a) = b
Type forall a b. (C a b,O a) = b can be considered to
On Friday 21 May 2010 19:06:51, R J wrote:
Why does the following, trivial code snippet below hang GHCi when I
typeScalene Failure, and what's the fix?
For an Ord instance, you need to define at least one of compare and (=) or
the other functions from the class won't work.
All methods have
On Friday 21 May 2010 20:50:39, Anatoly Yakovenko wrote:
anyone else seeing this behavior?
anato...@anatolyy-linux ~ $ ghci
GHCi, version 6.12.1: http://www.haskell.org/ghc/ :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading
On Friday 21 May 2010 22:06:43, Henning Thielemann wrote:
On Fri, 21 May 2010, Daniel van den Eijkel wrote:
Dear Haskellers,
I just want to share an observation. I had to convert a Double to a
Float value in an inner loop of an application, and I used somethin
like this:
xf =
On Saturday 22 May 2010 15:00:25, Thomas Schilling wrote:
Actually, in this case it would be safe to do CSS. Because
a) the function is strict in both arguments so GHC creates a worker
which only uses unboxed types
b) this cannot cause any space leaks (it contains no pointers)
The
On Saturday 22 May 2010 16:48:27, Daniel Fischer wrote:
The boxing is due to the use of (^).
If you write x*x instead of x^2, it can use the primop *## and needn't
box it.
As a side effect, the original time leak probably wouldn't have occured
with x*x instead of x^2 because one would've made
On Sunday 23 May 2010 01:10:54, Vladimir Ch. wrote:
I'm using Project Euler to learn Haskell. In particular, I'm writing a
program for Problem 18:
snip
The program works, but consumes obscene amount of memory.
Not if it's compiled. Even interpreted I wouldn't call it obscene, though
it is
On Sunday 23 May 2010 13:12:16, wren ng thornton wrote:
Daniel Fischer wrote:
There are more rules elsewhere. If you compile with optimisations, GHC
turns your realToFrac into double2Float# nicely, so it's okay to use
realToFrac.
However, without optimisations, no rules fire, so you'll
On Sunday 23 May 2010 15:33:58, Ivan Lazar Miljenovic wrote:
R J rj248...@hotmail.com writes:
Say I've got a type Month declared as an instance of the Enum
class, and a type MonthPair declared as a pair of months:
data Month = January | February | March | April | May | June | July |
On Sunday 23 May 2010 18:24:50, R J wrote:
Correction: the theorem is
h . either (f, g) = either (h . f, h . g)
Still not entirely true,
const True . either (undefined, undefined) $ undefined = True
while
either (const True . undefined, const True . undefined) undefined =
undefined
On Monday 24 May 2010 15:48:14, Jonas Almström Duregård wrote:
Consider that calling
id undefined
requires evaluating undefined before you can call id. The program will
crash before you ever call id. Of course, the identity function
should have produced a value that crashed in
On Monday 24 May 2010 17:08:50, Juan Maiz wrote:
I'm trying use subRegex to replace using back references just like the
docs says:
http://hackage.haskell.org/packages/archive/regex-compat/0.92/doc/html/T
ext-Regex.html#v%3AsubRegex
But when i try to replace with \1 i got \SOH and not e. Can
On Monday 24 May 2010 21:35:10, Anatoly Yakovenko wrote:
:set -fglasgow-exts
Can't you be more discriminating and turn on only those extensions you
regularly use?
:set prompt
Thats all i have in my .ghci file
Shouldn't cause a cd.
Maybe
$ ghci -v4
would give a hint?
On Tuesday 25 May 2010 04:26:07, Ivan Miljenovic wrote:
On 25 May 2010 12:20, Magicloud Magiclouds
magicloud.magiclo...@gmail.com wrote:
This is the function. The problem sure seems like something was
preserved unexpected. But I cannot find out where is the problem.
seperateOutput file
On Tuesday 25 May 2010 08:14:13, Ivan Miljenovic wrote:
On 25 May 2010 16:12, Magicloud Magiclouds
magicloud.magiclo...@gmail.com wrote:
Yes, this code works with a little hack. Thank you.
I'm scared to ask: what pray tell is this little hack?
Looking at it again, probably making it work
On Tuesday 25 May 2010 10:44:57, Ivan Lazar Miljenovic wrote:
Daniel Fischer daniel.is.fisc...@web.de writes:
On Tuesday 25 May 2010 08:14:13, Ivan Miljenovic wrote:
On 25 May 2010 16:12, Magicloud Magiclouds
magicloud.magiclo...@gmail.com wrote:
Yes, this code works with a little hack
On Tuesday 25 May 2010 13:36:01, Ionut G. Stan wrote:
Hi,
I'm doing TDD in pretty much all of the languages that I know, and I
want to introduce it early in my Haskell learning process. I wonder
though, if there's some established process regarding TDD, not unit
testing.
I've heard of
On Tuesday 25 May 2010 14:36:46, Ionut G. Stan wrote:
On 5/25/10 2:50 PM, Daniel Fischer wrote:
On Tuesday 25 May 2010 13:36:01, Ionut G. Stan wrote:
Hi,
I'm doing TDD in pretty much all of the languages that I know, and I
want to introduce it early in my Haskell learning process. I
On Tuesday 25 May 2010 20:51:06, Eugeny N Dzhurinsky wrote:
Hello, all!
I'm trying to create set of polymorphic functions for working with
custom containers. I decided to try out typeclass and define generic
function, which uses the methods from the typeclass. The quick and naive
solution is
On Tuesday 25 May 2010 23:47:30, Mujtaba Boori wrote:
Hello
I am try to solve this equation
Define a higher order function that tests whether two functions , both
defined on integers , coincide for all integers between 1 and 100
how can I solve this ?
is there any thing in Haskell
On Thursday 27 May 2010 08:46:04, Magicloud Magiclouds wrote:
I only have one alex installed under ~/.cabal/bin.
It seems working with shell environment, but not cabal.
My guess:
You added ~/.cabal/bin to the path, but have quoted the path, like
export PATH=~/.cabal/bin:$PATH
in your
On Friday 28 May 2010 20:44:20, Donn Cave wrote:
Quoth Vo Minh Thu not...@gmail.com,
...
Control.Monad.Error provides an instance for Either.
... in the mtl transformer library, in case anyone else besides
myself didn't know that. And I see it has to be there because
it depends on the
On Saturday 29 May 2010 01:28:59, Ivan Lazar Miljenovic wrote:
Daniel Fischer daniel.is.fisc...@web.de writes:
On Friday 28 May 2010 20:44:20, Donn Cave wrote:
Quoth Vo Minh Thu not...@gmail.com,
...
Control.Monad.Error provides an instance for Either.
... in the mtl transformer
On Saturday 29 May 2010 02:26:38, Ivan Lazar Miljenovic wrote:
Daniel Fischer daniel.is.fisc...@web.de writes:
But if you want to have
instance Monad (Either ConcreteType) where ...
, you can have
fail msg = Left someDefaultValue
(or let the value depend on the message
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,
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,
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.
___
Haskell-Cafe mailing list
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
division in Python, C, Java or C#.
Of course this doesn't work on Integers...
/J
On 1 June 2010 21:08, Daniel Fischer daniel.is.fisc...@web.de wrote:
On Tuesday 01 June 2010 20:26:55, Jonas Almström Duregård wrote:
One might expect a == (a/b)*b and other common arithmetic formulas
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.
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