>
>> >>
>> >>
>> >> On Fri, Aug 16, 2013 at 5:35 AM, AntC
>> > clear.net.nz> wrote:
>> >> There's an annoying inconsistency:
>> >> (CustId 47, CustName "Fred", Gender Male) -- threeple
>> >&g
emoizes it, and it runs much more slowly.
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eciated.
>>
>> Cheers,
>>
>> --
>> Matt
>>
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>
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can't just pass Haskell values directly to C is that some
>> GHC developer was feeling lazy at the time.
>>
>> --
>> brandon s allbery kf8nh sine nomine
>> associates
>> allber...@gmail.com
>> ballb...@sinenomine.net
>> unix, o
Person a
This means "for all types A which have the kind Gender, I can give you
a Person with that type." The Alive declaration and deriving clause
can be fixed in a similar way.
Also, to enable the "forall" syntax, you need to add
{-# LANGUAGE ExplicitForAll #-}
at the top
46 PM, Niklas Hambüchen wrote:
> Awesome, that works very well, and it even made my program run faster /
> with less CPU.
>
> The reset functionality is useful, but I think optional is better. Did
> you remove it entirely or is it still available?
>
> On Tue 14 May 2013 08:2
hen wrote:
>> Can you show me the code that triggers that behavior?
>
> It is basically
>
> Just connection <- connect
> forever $ do
> (x,y) <- getGyroMovement
> runRobotWithConnection (moveBy x y) connection
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e: lambda.f
#x27;s impossible for
> me to Ctrl-C my program: Only "c" is sent all the time, me pressing
> Ctrl seems to be reset with the next robot event.
Can you show me the code that triggers that behavior?
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Chris Wong, fixpoint conjurer
e: lambda.fa...@gmail
On Thu, May 9, 2013 at 1:36 PM, Chris Wong
wrote:
> On Thu, May 9, 2013 at 4:47 AM, Niklas Hambüchen wrote:
>> Hi,
>>
>> I just started using your library to move my cursor.
>>
>> Is it possible that it ignores negative values in moveBy?
>>
>> In oth
els from a
> window at some point?
Not sure -- I have no idea how screen capturing works in X11. Calling
gnome-screenshot should probably cover most use cases.
Chris
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Happy hacking!
Chris
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mes a
> "*" kind). And I didn't want to make the type with a regular "data"
> declaration either, because then I have to give it a constructor, which
> doesn't fit with what I want the type to do.
>
> --
> frigidcode.com
>
> ___
On Thu, Feb 28, 2013 at 1:26 PM, Brandon Allbery wrote:
> On Wed, Feb 27, 2013 at 8:37 AM, Corentin Dupont
> wrote:
>> Hi Chris,
>> Thanks!
>> That's true for the user number. What should I do? Encrypt it?
>
> It's not that you have a user number, or even that it's accessible: it's
> that it's th
> Hello everybody!
> I am very happy to announce the beta release [1] of Nomyx, the only game
> where You can change the rules.
I just gave it a go -- it looks fun :)
However, I've spotted a security hole. The current user number is
stored in the URL -- if I change that number, I can masquerade a
Hi Petr,
Congratulations -- you've just implemented a Moore machine! [1]
I posted something very much like this just last year [2]. It's a very
common pattern in Haskell, forming the basis of coroutines and
iteratees and many other things.
Edward Kmett includes it in his machines package [3]. Hi
Hi Petr,
On Sun, Dec 9, 2012 at 7:59 AM, Petr P wrote:
>
> The class is defined as
>
> > class (Monoid w, Monad m) => MonadWriter w m | m -> w where
> > ...
>
> What is the reason for the Monoid constrait? It seems superfluous to me. I
> recompiled the whole package without it, with no problems
Hello José,
> So, I have a typeclass "Action" which defines method "run":
>
> class Action a where
> run :: a -> Int
>
> (snipped)
>
> Now, I want to parse either "A" or "B" from a String.
> I was thinking about something like this...
>
> parseAction :: (Action a, Read a) => String -> a
> pars
Hello!
On Thu, Oct 18, 2012 at 6:59 AM, Petr P wrote:
> Hi,
>
> (this is a literate Haskell post.)
>
> lately I was playing with the Writer monad and it seems to me that it
> is too tightly coupled with monoids. Currently, MonadWriter makes the
> following assumptions:
>
> (1) The written val
On Tue, Oct 2, 2012 at 3:23 PM, Conrad Parker wrote:
> Nice, it builds and runs fine for me. Perhaps you could include a few
> more example commandlines to get started? Running without arguments
> (as the README.mkd suggests) just prints the help text.
Thanks for pointing that out! I've added an
Hello all
Some of you in the audience may have read Dave Keenan's paper, [To
Dissect a Mockingbird][]. A subset of that may have wondered if it was
possible to generate those pretty pictures programmatically. For that
subset, I can answer to you -- yes, yes you can.
[To Dissect a Mockingbird]: ht
On Mon, Sep 3, 2012 at 3:15 PM, Richard Wallace
wrote:
> I like the approach so far. But hellno itself seems to have several
> dependencies itself. So installing with cabal pulls these in as
> "fixed" libraries ("text", "mtl", "transformers", and "parsec"). Any
> plans to make these not have to
On Wed, Aug 22, 2012 at 7:16 PM, yi huang wrote:
> I have a `newtype Yun a = Yun { unYun :: ReaderT YunEnv (ResourceT IO) a }`
> , and i need to define an instance of `MonadBaseControl IO` for it.
> Newtype instance deriving don't work here. I guess the answer is simple, i
> just can't figure it o
On Mon, Jun 4, 2012 at 1:16 PM, Jens Petersen
wrote:
> Congratulations on the release!
> Equally surprising to me is that the number of slashes
> also seems to affect the CSS presentation of the website
> in Chrome.
>
> // seems to give the Summer theme,
> whereas / gives the Winter one!
>
> Kind
On Mon, Jun 4, 2012 at 1:16 PM, Jens Petersen
wrote:
> Congratulations on the release!
> Equally surprising to me is that the number of slashes
> also seems to affect the CSS presentation of the website
> in Chrome.
>
> // seems to give the Summer theme,
> whereas / gives the Winter one!
>
> Kind
On Fri, Jun 1, 2012 at 6:23 AM, C K Kashyap wrote:
> Hi folks,
>
> I have the opportunity to make a presentation to folks (developers and
> managers) in my organization about Haskell - and why it's important - and
> why it's the only way forward. I request you to share your
> experiences/suggestio
Sorry for the delayed response -- I've had exams the past few days.
On Sun, May 27, 2012 at 8:21 PM, Eugene Kirpichov wrote:
> A lot of people have done this :) eg from me: google up a fairly recent
> thread from me about processing streams and perhaps the keyword "timeplot"
> (writing from a d
Hello all
I just came up with a way of executing multiple folds in a single
pass. In short, we can write code like this:
average = foldLeft $ (/) <$> sumF <*> lengthF
and it will only traverse the input list once.
The code is at: https://gist.github.com/2802644
My question is: has anyone do
Rustom:
> O well... If the noob trap is one error playing it safe is probably another
> so here goes with me saying things that I (probably) know nothing about:
> 1. cabal was a beautiful system 10 years ago. Now its being forcibly scaled
> up 2 (3?) orders of magnitude and is creaking at the sea
On Sat, May 12, 2012 at 12:41 AM, Gregg Lebovitz wrote:
> I would find it useful to pull all this information together into a single
> document that discusses all the performance issues in one place and shares
> the real life experience is dealing with each issue. I see this as a best
> practice p
On Sat, Apr 7, 2012 at 2:02 AM, Dominic Steinitz
wrote:
> Hi,
>
> I'm trying to install REPA but getting the following. Do I just install
> base? Or is it more complicated than that?
>
> Thanks, Dominic.
I think the easiest solution is to just use an older version of Repa.
According to Hackage, t
On Tue, Mar 27, 2012 at 11:03 AM, Antoine Latter wrote:
> On Mon, Mar 26, 2012 at 4:25 PM, Ting Lei wrote:
>> Hi Antoine and Tobias (and everyone else),
>>
>> Thanks a lot for your answers. They are really helpful
>>
>> Can you please show me how to use the (Eq m) constraint to do this?
>>
>> Als
On Tue, Mar 13, 2012 at 12:24 PM, Chris Smith wrote:
> On Mon, Mar 12, 2012 at 3:14 PM, Kevin Clees wrote:
>> Now my function looks like this:
>>
>> tmp:: [(Int, Int)] -> Int -> (Int, Int)
>> tmp [] y = (0,0)
>> tmp xs y = xs !! (y-1)
>
> Just a warning that this will still crash if the list is n
Hello Matias
On Wed, Feb 22, 2012 at 4:02 PM, Matias Hernandez wrote:
> Hi Alberto.
>
> Do we need cygwin to install your compiled package?
I don't believe you do. If memory doesn't fail me, the Haskell
Platform includes a compiler (MinGW), but not a shell (MSYS).
This page explains all: http:/
Hello
On Tue, Feb 21, 2012 at 8:32 PM, Manoj Chaudhari wrote:
> Hi,
>
> We are looking for senior technical resources with skills in
> Haskell/Functional programming.
> Experience : 6 to 20 years,
>
> Job Location : Pune (India).
Out of curiosity, what will the job involve?
Also, it is bad neti
Sorry, accidentally clicked "Reply" rather than "Reply to all". Here's
the message I sent:
-- Forwarded message --
From: Chris Wong
Date: Fri, Feb 3, 2012 at 7:44 PM
Subject: Re: [Haskell-cafe] Contributing to http-conduit
To: "Myles C. Maxfield&q
On Mon, Jan 30, 2012 at 10:13 AM, Marc Weber wrote:
> A lot of work has been gone into GHC and its libraries.
> However for some use cases C is still preferred, for obvious speed
> reasons - because optimizing an Haskell application can take much time.
As much as any other high-level language, I
>> I like let (hd, _ : tl) = break prd lst in...
>
> Oh, wait. That won't always work. :(
>
second (drop 1) . break prd list?
:)
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On Fri, Dec 30, 2011 at 1:24 PM, Daniel Fischer
wrote:
> On Thursday 29 December 2011, 23:52:46, Omari Norman wrote:
>> [...]
>
> 'fail' doesn't properly belong in the Monad class, it was added for the
> purpose of dealing with pattern-match failures, but most monads can't do
> anything better tha
On Fri, Dec 30, 2011 at 4:47 PM, David Thomas wrote:
> Is there any particular reason IO functions in the standard libraries aren't
> grouped into type-classes?
I'm guessing it's to stop the report from getting too complicated. If
you want an IO abstraction, you can try HVIO:
http://hackage
On Fri, Dec 30, 2011 at 2:53 PM, Steve Horne
wrote:
> I've been for functions like GetMessage, TranslateMessage and
> DispatchMessage in the Haskell Platform Win32 library - the usual message
> loop stuff - and not finding them. Hoogle says "no results found".
>
> Is this level of Win32 GUI coding
On Thu, Dec 29, 2011 at 2:45 PM, Antoine Latter wrote:
> [...]
>
> When GHC opens files for reading, it asks windows to disallow write
> access to the file. I'm guessing that Framemaker has the file open for
> writing, so GHC can't get that permission.
In fact, this is required behavior according
On Wed, Dec 21, 2011 at 10:53 AM, Matthew Farkas-Dyck
wrote:
> With GHC 7.0.3:
>
> $ cat test.hs
> class ℝ a where {
> test :: a;
> };
>
> (∈) :: Eq a => a -> [a] -> Bool;
> x ∈ (y:ys) = x == y || x ∈ ys;
>
> main = putStrLn "Two of three ain't bad (^_~)";
> $ runhaskell test.hs
> Two of three ai
> One thing that concerns me is the use of capital letters to distinguish type
> and class names and constructors from values. If I was doing it over I
> would use a typographical distinction like italics for types, bold for
> classes. That way we could have a constructor named ∅, a function name
On Sat, Dec 17, 2011 at 12:27 PM, KC wrote:
> ... with the same functionality.
>
> Thus, your program would be a moving target to hackers.
>
> Would this be challenging with ghc?
Although it's possible, I doubt this would do anything. Most exploits
are just programmer mistakes; changing the objec
On Thu, Dec 15, 2011 at 9:13 PM, Gregory Crosswhite
wrote:
> First of all, it sounds like we all agree that the documentation for
> Alternative needs to be improved; that alone would clear a lot of the
> confusion up.
I wonder if "fully documenting the Haskell base library" is a valid
SoC projec
> Okay, so how about the following as a user narrative for some and many?
>
> ...
I was in the middle of writing my own version of Applicative when I
stumbled on this intense debate. Here's what I wrote for the
documentation:
class (Applicative f, Monoid f) => Alternative f where
-- | Keep re
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