Hi,
The version of Cloud Haskell you cite is a prototype. I recommend you
use the 'distributed-process' package instead; it is licensed under
BSD3.
Edsko
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Hi guys,
I've started playing with Iteratee and Enumerators: very cool and addictive
stuff.
I have wrote this simple code:
https://gist.github.com/3899017
In a nutshell, it gives back the number of occurences for a single char in
case the argument passed from the command line is a single char,
You have a space leak in countCharBS. Put a bang pattern on your
accumulator.
On Tue, Oct 16, 2012 at 2:46 PM, Alfredo Di Napoli
alfredo.dinap...@gmail.com wrote:
Hi guys,
I've started playing with Iteratee and Enumerators: very cool and
addictive stuff.
I have wrote this simple code:
On Mon, Oct 15, 2012 at 11:29 PM, Dan Doel dan.d...@gmail.com wrote:
I'm uncertain where this, compositional means written as the
composition of functions, thing started. But it is not what I, and
I'm sure any others mean by the term, compositional.
You're right. It's a rather recent, as far
On Mon, Oct 15, 2012 at 6:30 PM, Joey Hess j...@kitenet.net wrote:
Michael Snoyman wrote:
I think I have a misunderstanding of how forkProcess should be working.
Ultimately this relates to some bugs in the development version of
keter, but
I've found some behavior in a simple test program
Le Tue, 16 Oct 2012 07:35:34 +0530,
damodar kulkarni kdamodar2...@gmail.com a écrit :
@Jake
In my opinion, this is not as nice as the do-notation version, but at
least it's compositional:
That's an important point you have made, as Haskellers value code
composition so much.
If code
Le Tue, 16 Oct 2012 09:51:29 -0400,
Jake McArthur jake.mcart...@gmail.com a écrit :
On Mon, Oct 15, 2012 at 11:29 PM, Dan Doel dan.d...@gmail.com wrote:
I'd be down with putting join in the class, but that tends to not be
terribly important for most cases, either.
Join is not the most
Although I agree that Functor should be a superclass of Monad, the two
methods of the Monad typeclass _are_ sufficient to make any instance into a
Functor in a mechanical/automatic way. The language may not know it, but
return/bind is equivalent in power to fmap/return/join. Apart from bind
being
Le Tue, 16 Oct 2012 11:22:08 -0400,
Daniel Peebles pumpkin...@gmail.com a écrit :
Although I agree that Functor should be a superclass of Monad, the two
methods of the Monad typeclass _are_ sufficient to make any instance
into a Functor in a mechanical/automatic way. The language may not
know
On Tue, Oct 16, 2012 at 10:37 AM, AUGER Cédric sedri...@gmail.com wrote:
join IS the most important from the categorical point of view.
In a way it is natural to define 'bind' from 'join', but in Haskell, it
is not always possible (see the Monad/Functor problem).
As I said, from the
Le Tue, 16 Oct 2012 11:58:44 -0400,
Dan Doel dan.d...@gmail.com a écrit :
On Tue, Oct 16, 2012 at 10:37 AM, AUGER Cédric sedri...@gmail.com
wrote:
join IS the most important from the categorical point of view.
In a way it is natural to define 'bind' from 'join', but in
Haskell, it is not
On Tue, Oct 16, 2012 at 1:19 PM, AUGER Cédric sedri...@gmail.com wrote:
What do you mean by demonstrate? If you do not want to fit the
mathematical presentation, then I have nothing to demonstrate, you have
your point of view, I have mine and they differ. Now, if you want to
I think the
I think the version below (with a Functor or Applicative superclass)
is clearly the right answer if we were putting the prelude together
from a clean slate. You can implement whichever is easiest for the
particular monad, use whichever is most appropriate to the context
(and add optimized
Not sure I really have anything substantial to contribute, but it's certainly
true that if you see
a - m b
as a generalisation of the usual function type, a - b, then return generalises
the identity and
kleisli generalises function composition. This makes the types pretty memorable
(and
On 15 October 2012 09:47, Michael Snoyman mich...@snoyman.com wrote:
Hi all,
I think I have a misunderstanding of how forkProcess should be working.
Ultimately this relates to some bugs in the development version of keter,
but I've found some behavior in a simple test program which I
Since we're talking about forkIO here - not forkOS - is it possible
to control the use of OS threads to avoid this problem? As I
understand it, the problem is with real OS threads. A program
running entirely in multiple `green' threads will fork to the same
set of threads in the same state,
The problems with forkProcess really are not Haskell's fault.
You will find warnings in the documentation for C's fork():
There are limits to what you can do in the child process.
To be totally safe you should restrict yourself to only
executing async-signal safe
On Tue, 16 Oct 2012 21:55:44 +0200
Alexander Kjeldaas alexander.kjeld...@gmail.com wrote:
There are variants of this, but the meta-problem is that at the point in
time when you call forkProcess, you must control all threads, ensuring that
*all invariants hold*. Thus no locks held, no thread
On Mon, Oct 15, 2012 at 8:51 PM, Chatsiri Ratana insider...@gmail.comwrote:
Should be not include intermediate C by call .hc file? It should be using
flags as below.
./configure --build=x86_64-unknown-netbsd --host=x86_64-unknown-netbsd
--target=x86_64-unknown-netbsd
Change flag in
Quoth lhagan lhaga...@gmail.com,
Just tried changing the flag in build.mk, but I get the same error. Also,
I'm pretty sure I need the --enable-hc-boot flag. Without it, I
get: configure: error: GHC is required unless bootstrapping from .hc files.
Unless I've missed a whole lot of progress on
On Tue, Oct 16, 2012 at 6:20 PM, Edsko de Vries edskodevr...@gmail.comwrote:
Hi,
The version of Cloud Haskell you cite is a prototype. I recommend you
use the 'distributed-process' package instead; it is licensed under
BSD3.
Edsko
Hello All,
I finding issues for forking project in
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