Thank you!
I feel stupid for posting a question when there is already a stackoverflow
answer. But now that I have that, I have all the information I need.
Greets,
Bram
On May 2, 2012 12:49 AM, Ivan Lazar Miljenovic ivan.miljeno...@gmail.com
wrote:
On 2 May 2012 06:15, Bram Neijt
dear static typing masters --
while working on an STM-like library, i ran into the issue of trying to create
a transaction log for reads / writes of heterogeneous reference types. i don't
have a good answer to this problem. the problem is twofold : first, the
general heterogeneous collection
Hi, long time no see.
I am using cabal-install-0.15.0. And the new solver. It sure solves
some problem. Thanks for the work.
Well, on the other hand, there still are hackages that I just have no
idea how the author make it (probably not up-to-date hackage
database). After human-solver checking,
Hi all!
Last day I was trying to fix idiii library, because it uses utf8 for parsing
non-unicode content. I found the functions
-- | Parses one value and returns it as a 'String'
parseString :: CharEncoding - TagParser String
parseString enc = do
v - case enc of
0x01 -
Hello cafe,
Translating Learn You a Haskell for Great Good into Japanese was
finished and will be published on 22 May. I guess it's worth watching
its cover page:
Hello Leon,
Out of curiousity, was this a plurality election (vote for one), or an
approval election (vote for many)?
Vote for one.
This application requires twitter login.
--Kazu
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Hi Heinrich,
the Munich Haskell Meeting is glad to announce a local one day
Hackathon in Munich. It will take place the 12th of May 2012 from
10am to 6pm. Please checkout the details at:
I'll join.
BTW: Any reason why we would not want to put this on the wiki? And can
we create an IRC
I would like to use LevelDB in my code, and the HEAD version of leveldb-haskell
now uses runResourceT to manage open db connections and iterators. I would also
like to run multiple threads, and coordinate them for transaction-like
behavior, i.e. read and writing data without interruption.
On Wed, May 2, 2012 at 11:36 AM, Warren Harris warrensomeb...@gmail.com wrote:
I would like to use LevelDB in my code, and the HEAD version of
leveldb-haskell now uses runResourceT to manage open db connections and
iterators. I would also like to run multiple threads, and coordinate them
for
On May 2, 2012, at 2:06 AM, Michael Snoyman wrote:
I don't really know the details of LevelDB, but if the question is
how do I run MVar operations in ResourceT,
yes
the answer would be
lifted-base[1]. Since ResourceT is an instance of MonadBaseControl,
you can use any of the functions
Ben wrote:
- use Data.Unique to identify Refs, and use existential quantification
or Data.Dynamic to create a heterogenous Map from uid to log. for
example, to represent a log of compare-and-swaps we might do something
like
data Ref a = Ref (IORef a) Unique
data OpaqueCAS = forall a .
Hello.
In order to learn GADTs, I have written the attached program, which
defines a type for arithmetic expressions using GADTs, a parser for
them, and an evaluation function.
But my parser does not typecheck. ghc-7.4.1 gives me the error message:
Expr.hs:25:28:
Couldn't match expected
* j.romi...@gmail.com j.romi...@gmail.com [2012-05-02 08:03:45-0300]
Hello.
In order to learn GADTs, I have written the attached program, which
defines a type for arithmetic expressions using GADTs, a parser for
them, and an evaluation function.
But my parser does not typecheck. ghc-7.4.1
On Wed, May 02, 2012 at 03:02:46PM +0300, Roman Cheplyaka wrote:
* j.romi...@gmail.com j.romi...@gmail.com [2012-05-02 08:03:45-0300]
[...]
The alternatives given to | must be of the same type. In your case,
one is Expr Double and one is Expr Bool.
Inclusion of pBool in pFactor is probably a
Ben wrote:
while working on an STM-like library, i ran into the issue of trying
to create a transaction log for reads / writes of heterogeneous
reference types. i don't have a good answer to this problem. the
problem is twofold : first, the general heterogeneous collection
problem, and second,
Hi Romildo,
On Wed, May 2, 2012 at 3:08 PM, j.romildo wrote:
You are right in the sense that I cannot mix Expr Bool and Expr Double
in a (O op l r) expression.
But the parser should be able to parse any form of expressions. So I
rewrite my program to take this into account.
The new
Greetings,
I am very pleased to officially announce Hac Phi 2012, a Haskell
hackathon/get-together to be held August 3-5 at the University of
Pennsylvania in Philadelphia. The hackathon will officially kick
off at 2:30 Friday afternoon, and go until 5pm on Sunday (with
breaks for sleep, of
I am curious how the title was translated. Of course, the English
title Learn You a Haskell for Great Good uses intentionally
ungrammatical/unidiomatic English for humorous effect. Is the
Japanese title also ungrammatical/unidiomatic Japanese? Or do
Japanese speakers not find that humorous?
I don't find it (the English title) humorous. I just assumed it was written
by a non-native English speaker.
On 2 May 2012 18:18, Brent Yorgey byor...@seas.upenn.edu wrote:
I am curious how the title was translated. Of course, the English
title Learn You a Haskell for Great Good uses
On 2 May 2012 18:18, Brent Yorgey byor...@seas.upenn.edu wrote:
I am curious how the title was translated. Of course, the English
title Learn You a Haskell for Great Good uses intentionally
ungrammatical/unidiomatic English for humorous effect. Is the
On Wed, May 2, 2012 at 1:25 PM, Colin
(caveat: I'm not a native speaker of Japanese)
I think the Japanese title is in a similar spirit as the original one.
Breaking it down:
Sugoi Haskell tanoshiku manabou!
sugoi - awesome (rather colloquial)
tanoshiku - while having fun
manabou - let's learn
In formal grammar it should be Sugoi
On 05/02/2012 07:37 PM, Brandon Allbery wrote:
On 2 May 2012 18:18, Brent Yorgeybyor...@seas.upenn.edu wrote:
I am curious how the title was translated. Of course, the English
title Learn You a Haskell for Great Good uses intentionally
ungrammatical/unidiomatic English for humorous effect.
On Wed, May 2, 2012 at 2:41 PM, Wojciech Jedynak wjedy...@gmail.com wrote:
In formal grammar it should be Sugoi Haskell tanoshiku WO manabou! -
this WO is a particle identifying the object and this omission is
normal in colloquial, spoken Japanese.
My basic Japanase is very rusty, but
On Wed, May 2, 2012 at 2:02 PM, Bardur Arantsson s...@scientician.netwrote:
On 05/02/2012 07:37 PM, Brandon Allbery wrote:
The English title does require a little context for the humor: it
leverages a chain of poor-translation memes going back (at least) to
all-your-base.
I always thought
2012/5/2 Felipe Almeida Lessa felipe.le...@gmail.com:
On Wed, May 2, 2012 at 2:41 PM, Wojciech Jedynak wjedy...@gmail.com wrote:
In formal grammar it should be Sugoi Haskell tanoshiku WO manabou! -
this WO is a particle identifying the object and this omission is
normal in colloquial, spoken
There are two threads, one which is waits on input via
hGetLine
and another, which should terminate this thread or close this handle.
like this? The trick is to fork the blocking call (hGetLine)
and wait on an MVar. That way, the kill signal can be handled:
{-# language PatternSignatures
Hi Cafe,
If you live in the Edmonton, Canada area, and you're interested in
functional programming, EFPUG is an informal discussion group you might
find interesting. Most of our talks have been on Haskell topics, but we're
interested in functional languages in general.
Our Google Group is
Hi Haskellers,
I'm trying to generate a random vertex in OpenGL as follows.
genPosition :: IO (Vertex3 GLfloat)
genPosition = do x - getStdRandom $ randomR (-1.6,1.6)
y - getStdRandom $ randomR (-1.0,1.0)
return (Vertex3 x y (-1))
Is there a library to traverse a source AST keeping state?
--
Tony Morris
http://tmorris.net/
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thanks oleg and heinrich for the solutions; i'll definitely take a look at the
vault package. i'll probably end up using unsafeCoerce though, it's too
tempting (shame on me.)
On May 2, 2012, at 2:33 AM, o...@okmij.org wrote:
It seems you actually prefer this solution, if it worked. This
On Wed, May 2, 2012 at 7:20 PM, Tony Morris tonymor...@gmail.com wrote:
Is there a library to traverse a source AST keeping state?
Hi Tony, I was able to do this [1] using haskell-src-exts and a state
monad. AST traversal is possible due to HSE deriving instances for
Data in all its datatype
Because GLfloat is simply a newtype wrapper for CFloat, which has a Random
instance, I would do:
{-# LANGUAGE StandaloneDeriving #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
deriving instance Random GLFloat
On Wed, May 2, 2012 at 6:29 PM, Mark Spezzano
mark.spezz...@chariot.net.auwrote:
Hi
Welcome to issue 225 of the HWN, an issue covering crowd-sourced bits
of information about Haskell from around the web. This issue covers the
week of April 22 to 28, 2012.
Announcements
Matthias Fischmann made a call for participation to the Hong Kong
Haskell hackathon, with tentative
Hi,
I tried this but now I get another error:
The data constructors of `GLfloat' are not all in scope
so you cannot derive an instance for it
In the stand-alone deriving instance for `Random GLfloat'
Mark
On 03/05/2012, at 10:39 AM, Patrick Palka wrote:
Because GLfloat is simply a
On 3/05/2012, at 5:18 AM, Brent Yorgey wrote:
I am curious how the title was translated. Of course, the English
title Learn You a Haskell for Great Good uses intentionally
ungrammatical/unidiomatic English for humorous effect. Is the
Japanese title also ungrammatical/unidiomatic Japanese?
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