Hi,
Today I found out that I cannot access hackage.haskell.org. I have
tried vpn/proxy to see if my network has something wrong. No luck.
--
竹密岂妨流水过
山高哪阻野云飞
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On 12 August 2010 16:45, Magicloud Magiclouds
magicloud.magiclo...@gmail.com wrote:
Hi,
Today I found out that I cannot access hackage.haskell.org. I have
tried vpn/proxy to see if my network has something wrong. No luck.
http://downforeveryoneorjustme.com/http://hackage.haskell.org agrees.
Hi Tillmann,
That's worked a treat -- thanks ever so much :)
Will
On Wed, Aug 11, 2010 at 7:50 PM, Tillmann Rendel
ren...@mathematik.uni-marburg.de wrote:
Will Jones wrote:
f :: Int - IO ()
f = undefined
g :: Int - Int - IO ()
g = undefined
h :: Int - Int - Int - IO ()
h
2010/7/23 Ivan Miljenovic ivan.miljeno...@gmail.com:
On 22 July 2010 18:33, David Waern david.wa...@gmail.com wrote:
[snip]
We currently only support concrete examples (i.e. unit tests), but the
plan is to add support for QuickCheck properties.
Would you have some kind of inbuilt time
On 11 August 2010 15:49, Ozgur Akgun ozgurak...@gmail.com wrote:
Personally, I'd like to use the macports version, if the ghc version there
was resonably recent (having 2 versions, a stable and an edge could be a
good idea?)
You could use Homebrew instead. That has a fairly up-to-date version
Hi All,
I looked at Hackage and found a couple of pure Haskell modules for
un-compression. Are there any for comression? I found Huffman compression -
but what I need is something that I can uncompress with standard tools.
--
Regards,
Kashyap
___
sounds good to me. where can I find the list of packages (or whatever they
call them in homebrew, formula?) available?
On 12 August 2010 11:49, Benedict Eastaugh ionf...@gmail.com wrote:
On 11 August 2010 15:49, Ozgur Akgun ozgurak...@gmail.com wrote:
Personally, I'd like to use the macports
On 12 Aug 2010, at 12:49, Benedict Eastaugh wrote:
On 11 August 2010 15:49, Ozgur Akgun ozgurak...@gmail.com wrote:
Personally, I'd like to use the macports version, if the ghc
version there
was resonably recent (having 2 versions, a stable and an edge could
be a
good idea?)
You could
On 12 August 2010 12:17, Ozgur Akgun ozgurak...@gmail.com wrote:
sounds good to me. where can I find the list of packages (or whatever they
call them in homebrew, formula?) available?
Homebrew only makes available GHC and the Platform:
On 12 August 2010 12:10, C K Kashyap ckkash...@gmail.com wrote:
I looked at Hackage and found a couple of pure Haskell modules for
un-compression. Are there any for comression? I found Huffman compression -
but what I need is something that I can uncompress with standard tools.
The zlib
2010/8/12 Max Bolingbroke batterseapo...@hotmail.com:
On 12 August 2010 12:10, C K Kashyap ckkash...@gmail.com wrote:
http://hackage.haskell.org/packages/archive/zlib/0.4.0.2/doc/html/Codec-Compression-GZip.html
It is not pure haskell implementation.
As I know there are no pure implementation.
On 12 August 2010 12:52, Hans Aberg haber...@telia.com wrote:
On
http://wiki.github.com/mxcl/homebrew/installation
it says:
delete /usr/local/include and/usr/local/lib
So its not for those that also installs standard distributions, it seems.
I thought this was just a recommendation.
--
It's for a purely academic purpose :)
On Thu, Aug 12, 2010 at 5:30 PM, Yuras Shumovich shumovi...@gmail.comwrote:
2010/8/12 Max Bolingbroke batterseapo...@hotmail.com:
On 12 August 2010 12:10, C K Kashyap ckkash...@gmail.com wrote:
The 2010 ACM SIGPLAN Workshop on ML
http://www.cs.rit.edu/~mtf/ml2010
Baltimore, Maryland, United States
Sunday, September 26, 2010
co-located with ICFP 2010
Call for
On 12 Aug 2010, at 14:08, Ozgur Akgun wrote:
On
http://wiki.github.com/mxcl/homebrew/installation
it says:
delete /usr/local/include and/usr/local/lib
So its not for those that also installs standard distributions, it
seems.
I thought this was just a recommendation.
It also says:
The file error_puzzle.hs begins like this:
main = do
inp - readFile input
writeFile output $ process inp
process :: String - String
When compiled with GHC 6.12.3 and run, it
gives the following result:
$ ./error_puzzle
error_puzzle: output: hClose: illegal operation (handle is finalized)
Hi,
readFile is lazy IO, so the unsafePerformIO or equivalents are already there.
It should be enough to invent a strict process function, but which ghc 6.12.3
isn't able to figure out that it is strict. Does it still work with :
writeFile output $! process inp
This raises another question :
ivan.miljenovic:
On 12 August 2010 16:45, Magicloud Magiclouds
magicloud.magiclo...@gmail.com wrote:
Hi,
Today I found out that I cannot access hackage.haskell.org. I have
tried vpn/proxy to see if my network has something wrong. No luck.
Give a definition for process and an input file that reproduce this
result.
Quite probably not the intended solution:
process :: String - String
process _ = error output: hClose: illegal operation (handle is
finalized)
Have fun!
Sebastian
--
Underestimating the novelty of the
We can only be so immutable. ;-) /groan
On 12 August 2010 17:50, Don Stewart d...@galois.com wrote:
ivan.miljenovic:
On 12 August 2010 16:45, Magicloud Magiclouds
magicloud.magiclo...@gmail.com wrote:
Hi,
Today I found out that I cannot access hackage.haskell.org. I have
tried vpn/proxy
Hi,
If I have a universally quantified type
mapInt :: forall a. (Int - a) - [Int] - [a]
I can instantiate that function over a type and get a beta-reduced
version of the type
mapInt [String] :: (Int - String) - [Int] - [String]
(I'm borrowing syntax from Pierce here since I don't think
The existential is a pair where one component is a type, and the type of the
second component depends on the value (i.e., which type went in the first
component) of the first. It's often called a sigma type when you have full
dependent types.
So your exists a. (Int - a) - [Int] - [a] type might
Sebastian Fischer wrote:
process _ = error output: hClose: illegal operation (handle is
finalized)
Haha, very good! But I'm thinking of a case where
GHC really does print out the error message.
-Yitz
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2010/8/8 Stephen Tetley stephen.tet...@gmail.com:
Maybe this paper is close?
Type-safe diff for families of datatypes
Eelco Lempsink Sean Leather Andres Löh
Thanks a lot! Just what I need.. and more trickier than I thought.
They represent any ADT as a tree and use diff algorithm for trees to
On 12 Aug 2010, at 12:52, Hans Aberg wrote:
its not for those that also installs standard distributions, it
seems.
But what's wrong with the binaries listed here:
http://haskell.org/ghc/
Fairly easy to install.
Yes and no; on OSX 10.5.8 it works better to install GHC from the
binary
it's clear that FP ideas are becoming mainstream
_without_ any need of help from the financial community
This is far from clear - unless you want to deny that the financial community
has had any impact on FP...
due to Objective C with its Smalltalk influence
...and it's interesting to
Hi,
to understand forall and exists in types, I find it helpful to look at
the terms which have such types.
Joshua Ball wrote:
mapInt :: forall a. (Int - a) - [Int] - [a]
I can instantiate that function over a type and get a beta-reduced
version of the type
mapInt [String] :: (Int -
On 12/08/10 15:09, Yitzchak Gale wrote:
The file error_puzzle.hs begins like this:
main = do
inp- readFile input
writeFile output $ process inp
process :: String - String
When compiled with GHC 6.12.3 and run, it
gives the following result:
$ ./error_puzzle
error_puzzle: output:
Sifflet 1.0 is now available on Hackage.
Sifflet is a visual, functional programming language
and support system for students learning about recursion.
Sifflet programmers define functions by drawing diagrams,
and the Sifflet interpreter uses diagrams to show how the
function calls are evaluated.
Anyone care to explain why? I also tested a slightly changed program
pasted below, and am very confused.
main = do
-- This call doesn't terminate, why?
print $ nonTermination a
-- Comment the above line to test the rest of the code
-- RTS detects the loop and bails out
print $
On Thu, Aug 12, 2010 at 1:25 PM, Wei Hu wei@gmail.com wrote:
Anyone care to explain why? I also tested a slightly changed program
pasted below, and am very confused.
main = do
-- This call doesn't terminate, why?
print $ nonTermination a
-- Comment the above line to test the
Threaded or not doesn't seem to make a difference. I just noticed with
optimization turned on, RTS does detect the loop.
On Thu, Aug 12, 2010 at 4:28 PM, Jason Dagit da...@codersbase.com wrote:
On Thu, Aug 12, 2010 at 1:25 PM, Wei Hu wei@gmail.com wrote:
Anyone care to explain why? I
Simon Marlow wrote:
process xs = blackhole where blackhole = tail blackhole
We have a winner!
Perhaps I should have stipulated that members of the
GHC team and their family members are not eligible to
participate.
Regards,
Yitz
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There is an existing implementation on hackage:
http://hackage.haskell.org/packages/archive/gdiff/1.0/doc/html/Data-Generic-Diff.html
On Thu, Aug 12, 2010 at 11:45 AM, Sergey Mironov ier...@gmail.com wrote:
2010/8/8 Stephen Tetley stephen.tet...@gmail.com:
Maybe this paper is close?
Wei Hu wrote:
nonTermination _ = blackhole where blackhole = blackhole
My original example was actually:
process :: String - String
process = let x = x in x
Regards,
Yitz
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Pierre-Etienne Meunier wrote:
Does it still work with :
writeFile output $! process inp
You're right, that changes things. Then the program prints:
loop
That would have given it away, of course. :)
Regards,
Yitz
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When I tried this it never returned, there was no error.
-deech
On Thu, Aug 12, 2010 at 4:04 PM, Yitzchak Gale g...@sefer.org wrote:
Pierre-Etienne Meunier wrote:
Does it still work with :
writeFile output $! process inp
You're right, that changes things. Then the program prints:
loop
Wei Hu wrote:
nonTermination _ = blackhole where blackhole = blackhole
My original example was actually:
process :: String - String
process = let x = x in x
process = process
works just as well.
What about the other part of the solution:
What is the cause of the error?
Of course,
Sebastian Fischer wrote:
process = process
Nice!
What about the other part of the solution:
What is the cause of the error?
Of course, the cause is the black hole. But why is it not reported?
Hmm. On second thought, perhaps it was a good idea after all
that I did not exclude GHC team
On 12 Aug 2010, at 20:46, Gaius Hammond wrote:
its not for those that also installs standard distributions, it
seems.
But what's wrong with the binaries listed here:
http://haskell.org/ghc/
Fairly easy to install.
Yes and no; on OSX 10.5.8 it works better to install GHC from the
binary
Hi,
the reading is not needed to make it happen.
main = writeFile output blackhole where blackhole = blackhole
In fact, writing is not needed either.
main = bracket
(openFile output WriteMode)
hClose
(\hdl - blackhole `seq` return ())
blackhole = blackhole
Note that
Daniel Peebles wrote:
The existential is a pair where one component is a type, and the type of the
second component depends on the value (i.e., which type went in the first
component) of the first. It's often called a sigma type when you have full
dependent types.
Not quite. Strong-sigma is a
Joshua Ball wrote:
Hi,
If I have a universally quantified type
mapInt :: forall a. (Int - a) - [Int] - [a]
I can instantiate that function over a type and get a beta-reduced
version of the type
mapInt [String] :: (Int - String) - [Int] - [String]
(I'm borrowing syntax from Pierce here since
On Thursday 12 August 2010 7:59:09 pm wren ng thornton wrote:
Not quite. Strong-sigma is a dependent pair where you can project both
elements. Weak-sigma is a dependent pair where you can only project the
first element (because the second is erased). Existentials are dependent
pairs where you
I'm trying to build PortMidi on the mac, and get the error shown below.
It appears that an OSX header is trying to include a Block.h file and
getting the GHC Block.h instead of the one it expects. I'm new to
Haskell and even newer to cabal, so I'm not sure how to go about solving
this.
(I am posting this to Cafe and Gtk2Hs Users; if you subscribe to both,
please reply to Cafe; but I will see your replies either place; thanks
much.)
I am trying to compile the Gtk2Hs demo program GladeTest.hs (located
in the ...\demo\glade dir), under MS Windows XP.
The error I get is:
In C++, maybe Java, I remember using a Robot to change the location of
the mouse on the screen. My intention is to do something like in an FPS
game where the mouse is always centered to make sure it doesn't run into
the edges of the screen. How can I do that in Haskell? I'm using OpenGL,
so if
On Thu, Aug 12, 2010 at 10:50 PM, Eitan Goldshtrom
thesource...@gmail.com wrote:
In C++, maybe Java, I remember using a Robot to change the location of the
mouse on the screen. My intention is to do something like in an FPS game
where the mouse is always centered to make sure it doesn't run
Thanks. That is exactly what I was looking for. I really appreciate the
help.
-Eitan
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