Jason Dagit writes:
> On Fri, Apr 30, 2010 at 11:30 PM, Jason Dagit wrote:
> Looking over this real quick, I think the Graph class should be changed to
> mention a and b:
>
> class Graph (gr a b) where ...
Won't work: you need to specify that gr has kind * -> * -> *; this is
exactly the same a
Jason Dagit writes:
> On Fri, Apr 30, 2010 at 11:08 PM, Ivan Lazar Miljenovic <
> ivan.miljeno...@gmail.com> wrote:
>>
>>
>> You're putting the constraint in the wrong places: put the "(Cls a) => "
>> in the actual functions where you need it.
>>
>
> That's solid advice in general, but it's still
On May 1, 2010, at 02:38 , Jason Dagit wrote:
Why wasn't the Graph class designed this way? My guess: It was
probably a decision that predated multiparameter type classes.
Or a specific decision was made to stick to Haskell'98 compatibility.
--
brandon s. allbery [solaris,freebsd,perl,pugs
I thought I'd install happstack to give it a try, but immediately hit
the following build problem:
$ cabal install happstack
Resolving dependencies...
cabal: cannot configure HJScript-0.5.0. It requires hsx >=0.7.0
For the dependency on hsx >=0.7.0 there are these packages: hsx-0.7.0.
However
On Fri, Apr 30, 2010 at 11:30 PM, Jason Dagit wrote:
>
>
> On Fri, Apr 30, 2010 at 11:08 PM, Ivan Lazar Miljenovic <
> ivan.miljeno...@gmail.com> wrote:
>>
>>
>> You're putting the constraint in the wrong places: put the "(Cls a) => "
>> in the actual functions where you need it.
>>
>
> That's so
On Fri, Apr 30, 2010 at 11:08 PM, Ivan Lazar Miljenovic <
ivan.miljeno...@gmail.com> wrote:
>
>
> You're putting the constraint in the wrong places: put the "(Cls a) => "
> in the actual functions where you need it.
>
That's solid advice in general, but it's still not going to work here if any
of
"Kevin Quick" writes:
> I need help understanding how to express the following:
>
>
>> data (Cls a) => B a = B [a]
I think this only works if you have a forall in there.
>
>> data GrB a b = GrB (B a)
>
>> instance Graph GrB where ...
>
> In the methods for the instance specification, I need
I need help understanding how to express the following:
data (Cls a) => B a = B [a]
data GrB a b = GrB (B a)
instance Graph GrB where ...
In the methods for the instance specification, I need to perform Cls a
operations on a.
* As shown, the compiler complains that it cannot dedu
Thanks Mike. I'll look at the pointers you've given.
Regards,
Kashyap
On Fri, Apr 30, 2010 at 8:01 PM, Mike Dillon wrote:
> I think you'll want to look at the Hadoop Streaming or Hadoop Pipes API.
>
> Further down the line, I think somebody will want to implement a Haskell
> library to deal with
On Apr 29, 7:47 am, John Creighton wrote:
> I've been trying to apply some stuff I learned about functional
> dependencies, but I run into one of two problems. I either end up with
> inconsistent dependencies (OverlappingInstances doesn't seem to
> apply) or I end up with infinite recursion. I w
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>
On Fri, Apr 30, 2010 at 11:09:05PM +0200, Daniel Fischer wrote:
> Hmm,
>
> 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> :t Data.Text.IO.readFile
> Data.Text.IO.readFile
> :: FilePath -> IO text-0.7.1
Am Samstag 01 Mai 2010 00:26:26 schrieb Bryan O'Sullivan:
> On Fri, Apr 30, 2010 at 3:14 PM, Daniel Fischer
wrote:
> > 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 id.
___
On Fri, Apr 30, 2010 at 3:14 PM, Daniel Fischer wrote:
>
> 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.
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Am Freitag 30 April 2010 23:20:59 schrieb Edward Kmett:
> On Fri, Apr 30, 2010 at 5:09 PM, Daniel Fischer
wrote:
> > 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
> > Data
On Fri, Apr 30, 2010 at 5:09 PM, Daniel Fischer wrote:
> 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 Data.Text(.Internal).Text
and Data.Text.Lazy(.Internal).Text.
but the machinery to
FYI i got the lazy pattern match from Patterson's "Programming with
Arrows," so I'm assuming it makes a difference. (I'll work out a real
example later.)
B
On Fri, Apr 30, 2010 at 8:45 AM, Daniel Fischer
wrote:
> Am Freitag 30 April 2010 17:23:19 schrieb Antoine Latter:
>> On Fri, Apr 30, 2010
On Fri, Apr 30, 2010 at 1:37 PM, Thomas Hartman wrote:
>
> why does the lazy version use the internal type, whereas the strict
> version of Text IO just using plain Data.Text type?
>
That's just ghci playing display games with you, based on the names under
which you imported the modules.
There
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,
Prelu
Data.Text.Lazy.Internal.Text = Data.Text.Lazy.Text
Data.Text.Internal.Text = Data.Text.Text
You can use fromChunks/toChunks from Data.Text.Lazy to break it up into
strict Text fragments.
The lazy version returns a Lazy Text value, which is isomorphic to
[Data.Text.Text]. The strict version just r
*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
why does the lazy version use the internal type, whereas the strict
version of Text IO
ketil:
>
> Don Stewart writes:
>
> > http://shootout.alioth.debian.org/u64q/haskell.php
>
> Observations:
>
> Although we're mostly beaten on speed, and about the same on code size,
> we're using a lot less memory than Java.
Prior to the upgrade we weren't mostly beaten on speed, so I think a
Thanks for the excellent links, that's exactly what I wanted. It's
interesting that they've chosen not to base the new work on libevent.
As an aside, I really don't think that the case study should be given any
more linkjuice as a response to GHC/Haskell IO concurrency questions. While
it's a wond
Hey everyone,
Just out of curiosity, does anyone know the story on what is holding up the
ability of GHC to generate 64-bit code on OSX?
Cheers,
Greg
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We are pleased to announce Combinatorrent v0.3.0
Combinatorrent is a bittorrent client, written in Haskell and with an emphasis
on concurrency.
This version has the following changes from v0.2.0:
- Numerous space leak fixes. The client doesn't leak memory anymore
for typical runs.
- A number o
On Fri, Apr 30, 2010 at 6:02 PM, Gwern Branwen wrote:
>>
>> Github has a REST API for accessing data. Unfortunately it can't give
>> you the wanted
>> breakdown, but I would ask them for it. It is much simpler for you,
>
> You mean ask for a new feature? (Just a one-time list is no good since
> I
On Fri, Apr 30, 2010 at 11:51 AM, Jesper Louis Andersen
wrote:
> On Fri, Apr 30, 2010 at 5:38 PM, Gwern Branwen wrote:
>> Nothing in http://develop.github.com/ seems especially useful for
>> grabbing the git:// URLs of all repos by language - just by user.
>>
>> The only real list of repos by lan
On Fri, Apr 30, 2010 at 5:38 PM, Gwern Branwen wrote:
> Nothing in http://develop.github.com/ seems especially useful for
> grabbing the git:// URLs of all repos by language - just by user.
>
> The only real list of repos by language seems to be gotten at via
> http://github.com/languages/Haskell/
Am Freitag 30 April 2010 17:23:19 schrieb Antoine Latter:
> On Fri, Apr 30, 2010 at 3:37 AM, Daniel Fischer
>
> 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 wondered about
Along the lines of
http://blog.patch-tag.com/2010/03/13/mirroring-patch-tag/ for
downloading all patch-tag.com repositories, I've begun to wonder how
to download all Github repositories since more and more people seem to
be using it.
Nothing in http://develop.github.com/ seems especially useful fo
On Fri, Apr 30, 2010 at 3:37 AM, Daniel Fischer
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 wondered about in Liu's paper too.)
>> Shouldn't it be
>>
>> instance ArrowLoop SFAu
I think you'll want to look at the Hadoop Streaming or Hadoop Pipes API.
Further down the line, I think somebody will want to implement a Haskell
library to deal with the Avro serialization protocol when it becomes
possible to write non-JVM mappers and reducers directly. This JIRA issue
covers the
Hello all,
the application from which I wish to copy (text) data to the clipboard
is not a GUI app, it's more of a simple test-script.
So I'd like to do it without having to install wxHaskell. I guess I'll
just have to bite my way through the Win32 API.
Right now I'm dumping the text output
I have been looking at using XML for a little program I have been
writing. The file I am currently trying to load is about 9MB, and I
have now tried to use
HaXml and HST. Without any of my own code, just a simple call to the
basic parsers, they both use huge amount of memory.
HST is the wors
Dear all,
I have been looking at using XML for a little program I have been
writing. The file I am currently trying to load is about 9MB, and I have
now tried to use
HaXml and HST. Without any of my own code, just a simple call to the
basic parsers, they both use huge amount of memory.
HST is
On Fri, 30 Apr 2010 08:21:11 +0300, Jason Dagit
wrote:
As far as I can tell from google wxwidgets does have clipboard support.
Perhaps wxHaskell can do it or needs to be extended?
Jason
I searched with Hayoo for
clipboard wx
and found Graphics.UI.WXCore.Controls.execClipBoardData [1];
Hi,
I've just uploaded mhailist, a mailing list manager a friend and I started
working on a while ago, to hackage [1]. It's very much experimental and an alpha
release, but it does the job for some mailing lists we have.
We're also looking for people who'd like to join us developing it; if you'r
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