the is the right contact and it seems like a pretty bad way
to start off with people who are trying to figure out what haskell
offers.
Thanks, Keith
On Thu, Sep 9, 2010 at 5:30 PM, Keith Sheppard keiths...@gmail.com wrote:
Hello cafe,
Maybe malicious isn't the right word but there is a JS based web
counter
Hello cafe,
Maybe malicious isn't the right word but there is a JS based web
counter on http://www.haskell.org/complex/why_does_haskell_matter.html
which likes to show pop up adverts. They must have switched over from
counting visitors to showing adverts at some point since the web page
was
for this to
take a couple of hours). ghc --version gives 6.10.4
- cabal install llvm
I still don't know the root cause of the build error but now the llvm
examples build and run with no errors.
-Keith
On Thu, Jun 17, 2010 at 10:46 PM, Keith Sheppard keiths...@gmail.com wrote:
Hello All,
I'm trying to get
Hello All,
I'm trying to get up and running with the very interesting llvm
package[1] but I'm running into problems during the linking stage.
ke...@sugarglider-2:~/projects/third-party/llvm-hs-bindings/examples/
make clean all
rm -f HelloJIT Fibonacci BrainF Vector Array DotProd Arith Align
1) The buildbot will catch dependencies with compile errors, but only
after the package has been pushed, and there is no easy way for
packagers to check that this won't happen
An alternate solution that can be done completely outside the hackage loop:
Set up a server to poll the
Sorry, rerun the build means rebuild my package and all of my
package's dependencies...
On Fri, Apr 23, 2010 at 7:11 PM, Keith Sheppard keiths...@gmail.com wrote:
1) The buildbot will catch dependencies with compile errors, but only
after the package has been pushed, and there is no easy way
What Gwern said for 1) and 3)
2) Not all head repositories are kept stable/buildable at all times.
Isn't it bad practice to not have a buildable repo? In any case
package owners would be free to use or ignore the data as they like,
but I'm pretty sure it would be useful to many.
Best, Keith
Hello Mujtaba,
I wonder is this homework? If that's the case there is nothing wrong
with asking homework related questions but they should probably be
marked as such.
I think the most straight forward solution will use function
composition (.) and the (not) function
-keith
On Sun, Apr 18, 2010
Using composition can be tricky with more than one arg. I just want to
be sure you're not really looking for something like:
func :: (a - Bool) - (b - Bool) - (a - b - Bool)
keeping with your given type I think you're looking for something like:
func f1 f2 x = (f1 x) || (f2 x)
I'm sure there
Hello,
I ran into this error while trying to install statistics. Does this
indicate that I need to upgrade my GHC before I can install?
k...@catskill:~/projects/ cabal update
Downloading the latest package list from hackage.haskell.org
k...@catskill:~/projects/ cabal install statistics
Sorry, I forgot to add my ghc version is 6.10.1 on OSX
k...@catskill:~/projects/ ghc --version
The Glorious Glasgow Haskell Compilation System, version 6.10.1
On Fri, Apr 16, 2010 at 1:08 PM, Keith Sheppard keiths...@gmail.com wrote:
Hello,
I ran into this error while trying to install
Hello,
I am one.
Best
Keith
2010/3/28 Günther Schmidt gue.schm...@web.de:
Hi guys,
are there any gay haskellers?
... Since the first one was so much fun ;)
Günther
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Hi, I think that Turbinado is no longer active since the author is
leaving Haskell (unless someone will adopt it)
http://www.alsonkemp.com/haskell/reflections-on-leaving-haskell/
-Keith
On Wed, Mar 17, 2010 at 5:25 PM, Hugo Gomes mr.hugo.go...@gmail.com wrote:
There is also turbinado. Im not
I asked a similar question a while ago on the cafe
http://www.haskell.org/pipermail/haskell-cafe/2009-June/thread.html#62772
On Wed, Mar 10, 2010 at 5:33 PM, TeXitoi texi...@texitoi.eu wrote:
After programming as an exercice the sum function, my version is
faster than the Data.List's version.
I did a blog post on basic matrix ops which may be useful to you
http://blog.keithsheppard.name/2009/06/bird-tracks-through-math-land-basic.html
It uses a 2D list representation for matrices which you would not do
for any performance critical work.
best
keith
On Wed, Feb 3, 2010 at 1:38 AM,
I have just started reading this so I don't know how good it is yet
but the draft is freely available:
http://research.microsoft.com/en-us/um/people/szeliski/Book/
Best
Keith
2010/1/25 Dan Mead d.w.m...@gmail.com:
Hey all
Can anyone recommend a good textbook on computer vision or image
Hello Cafe,
I noticed on my package's hackage page there is a build failure message:
http://hackage.haskell.org/package/txt-sushi
I don't know if these are real errors or not (I don't experience them
on OS X and it's pure Haskell code) but I did poke around and noticed
that some popular packages
Hello, My impression is that using existential types where possible
will result in more complete type checking than Data.Dynamic but I'm
not sure since I haven't yet tried Data.Dynamic in my own code. Can
someone confirm if this is right?
Best
Keith
On Thu, Jan 7, 2010 at 2:02 PM, Christian
Hello Cafe,
I've uploaded a new version of TxtSushi to
http://hackage.haskell.org/package/txt-sushi and announced the details
here http://blog.keithsheppard.name/2009/12/txtsushi-050.html.
TxtSushi is a set of command-line utilities for transforming CSV and
tab-delimited files including an SQL
I don't think such a tool exists. I think it would be a great
contribution if someone decides to create one.
Best
Keith
On Wed, Dec 23, 2009 at 12:34 PM, jonathangfisch...@gmail.com wrote:
I would like to generate Haskell data types and xml serialization code from
xsd. I know of DtdToHaskell
Yes I'm interested in helping too. It's hard for me to know how much
time I'll have but my other side proj is starting to wind down now.
Maybe a wiki planning page and a patch-tag (or any other repo site
really) workspace is a good starting point?
Sent from my iPhone
On Dec 23, 2009, at
Hello, I didn't try to understand what the function is doing, but just
quickly noticed that
reMatr a = Matr . (flip (.) unMatr) a
can be written as
reMatr a = Matr . ((flip (.) unMatr) a)
but that
reMatr = Matr . (flip (.) unMatr)
can be written as
reMatr a = (Matr . (flip (.) unMatr)) a
What about if during the Checking a Cabal package upload step there
was a check to see if there was a homepage in the cabal file? If there
is no homepage we could have something like:
Your cabal file does not contain a link to a project homepage. You
may want to add a haskell wiki link as your
There is nothing wrong with constructive criticism and debate. We
should welcome it and I think that the initial response did. But the
OP's follow up of:
It will be better for all of you to figure it out for yourselves and
gain more experience about what is out there. Haskell isn't the world.
hoogle is down for me: Internal Server Error
Thanks
Keith
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Hello Philippos
I received a lot of furious and offensive private emails for suggesting the
Clean programmer to stick with Clean.
I don't get why some people think it's OK to be disrespectful just
because they're on the internet...
Regarding the code, I find it hard to follow without some
I have to nominate I'm lying here, but for a good cause as a quote
of the week.
-Keith
On Mon, Oct 5, 2009 at 10:06 AM, Deniz Dogan deniz.a.m.do...@gmail.com wrote:
2009/10/5 Maria Boghiu maria.bog...@gmail.com:
I get an error saying I am mismatching types IO [String] and [String].
Something
IMO google web toolkit has done this for Java and I haven't tried it
but maybe http://www.haskell.org/haskellwiki/Haskell_in_web_browser
does or will do this for Haskell. I still think that there is a place
for web applications that are smart on the server side though.
Best
-Keith
On Sun, Oct 4,
Hello Cafe,
I've just uploaded TxtSushi 0.4.0 to hackage. TxtSushi is a collection
of command line utilities for processing comma-separated and
tab-delimited files. I posted details on my blog (along with an
advertisement to see if others are interested in hacking TxtSushi):
I think having access to the parsec library would be a major plus that
you can show off. Eg: you can have a RoR based email web app that uses
parsec parsing to figure out which sections of an email thread belong
to which author...
Best
-Keith
On Sat, Oct 3, 2009 at 11:08 PM, Mark Wotton
This seems to me like the kind of thing hackage maintainers should be
giving guidance on (maybe they do already?) so that there is
consistency.
Sorry if this seems too off base, but here I go anyway... I have used
apache IVY for packaging/dependency management in java and I really
like the way it
Hello Dmitry,
I too was looking for something like this and came up empty. I
proposed something similar on the haskell_proposals reddit...
http://www.reddit.com/r/haskell_proposals/comments/8zhkx/haxb_and_haxws/
... but I was left with the impression that there isn't much interest.
-Keith
On
That's perfect. Thanks!
On Sat, Jul 11, 2009 at 12:10 AM, Gwern Branwengwe...@gmail.com wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA512
On Fri, Jul 10, 2009 at 11:46 PM, Keith Sheppard wrote:
Is there a way for a cabalized program to get its own info. I'm
specifically interested
Is there a way for a cabalized program to get its own info. I'm
specifically interested in version info.
Thanks
Keith
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I see some parallels between Inversion of Control/Dependency Injection
frameworks and monads. I would say annotations are tools that are
sometimes used for those frameworks, but they are also used for other
unrelated things (warning suppression, overriding functions ...) so it
may be more clear to
Hello Cafe,
I'm looking to make it possible for people to use urls directly in my
haskell program (TxtSushi) and I'd like your suggestions if you have
any. I really like the API's for download and download-curl, but I'm
wondering what the practical differences are between the two? Is
forgot to cc the cafe :-)
On Sun, Jun 21, 2009 at 1:08 PM, Keith Sheppardkeiths...@gmail.com wrote:
hmm, it's been a while but...
i think this infinite loop with a free variable would cause collision
(\a . a a) (\b . b b d)
On Sun, Jun 21, 2009 at 12:53 PM, Andrew
scratch that... it's completely wrong
On Sun, Jun 21, 2009 at 1:09 PM, Keith Sheppardkeiths...@gmail.com wrote:
forgot to cc the cafe :-)
On Sun, Jun 21, 2009 at 1:08 PM, Keith Sheppardkeiths...@gmail.com wrote:
hmm, it's been a while but...
i think this infinite loop with a free variable
OK, I think I went off on a tangent that isn't very useful anyway
thanks
-Keith
On Wed, Jun 17, 2009 at 6:32 PM, Lennart
Augustssonlenn...@augustsson.net wrote:
The creators of Haskell didn't pick any particular representation for numbers.
(Well, literals are kind of In..tegers.) You can pick
equivalent?
-Keith
On Thu, Jun 18, 2009 at 7:53 AM, Thomas Davietom.da...@gmail.com wrote:
No, I think it's extremely useful. It highlights that numbers can both be
lazy and strict, and that the so called useless lazy sum, is in fact,
useful.
Bob
On 18 Jun 2009, at 13:29, Keith Sheppard wrote
Haskell's numeric literals are strict. You wouldn't want that to
change right? It seems to me that having sum and product be strict is
consistent with this.
-Keith
On Wed, Jun 17, 2009 at 11:15 AM, Thomas Davietom.da...@gmail.com wrote:
On 17 Jun 2009, at 13:32, Yitzchak Gale wrote:
Henk-Jan
In lambda calculus numbers are just functions and you evaluate them
just like any other function. Haskell could have chosen the same
representation for numbers and all evaluation on numbers would be lazy
(assuming normal order evaluation). I think that would have been the
Purist Lazy way to go.
The answer is sometimes (only if you use an optimize flag):
ke...@sugarglider:~/temp/ cat sumtest.hs
main = putStrLn . show . sum $ [0 .. 100]
ke...@sugarglider:~/temp/ ghc --make sumtest.hs
[1 of 1] Compiling Main ( sumtest.hs, sumtest.o )
Linking sumtest ...
I just realized... that was a statement not a question :-)
anyway, thanks
Keith
On Mon, Jun 15, 2009 at 11:14 AM, Don Stewartd...@galois.com wrote:
keithshep:
Is there any reason that sum isn't strict? I can't think of any case
where that is a good thing.
Prelude sum [0 .. 100]
***
Is there any reason that sum isn't strict? I can't think of any case
where that is a good thing.
Prelude sum [0 .. 100]
*** Exception: stack overflow
-Keith
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That's an interesting example. I guess a lazy number system like that
would work nicely for Deniz's use case.
On Sat, Jun 13, 2009 at 10:26 AM, Stephan
Friedrichsdeduktionstheo...@web.de wrote:
Jochem Berndsen wrote:
Keith Sheppard wrote:
Is there any reason that sum isn't strict? I can't
I guess the short answer is that it is not possible. 'x' is immutable
and if you want a different value than 'x' that expression has to be
given a different name like:
let x=1
y=x+2
...
But I'm not sure if that helps you. Haskell does things very
differently than the imperative languages
now on and if you want to follow progress more
closely I'll post all updates to this feed.
http://blog.keithsheppard.name/feeds/posts/default/-/TxtSushi
Thanks,
Keith
On Sun, May 17, 2009 at 11:07 AM, Keith Sheppard keiths...@gmail.com wrote:
Hello Haskell Cafe
I have released the first version
Hello Haskell Cafe
I have released the first version of TxtSushi which is a collection of
command line utils (written in haskell of course) for processing
tab-delimited and CSV files. It includes a util for doing SQL SELECTs
on flat files. This is my first haskell project and feedback of all
to ByteString's,
and beware memory leaks.
2009/5/17 Keith Sheppard keiths...@gmail.com:
Hello Haskell Cafe
I have released the first version of TxtSushi which is a collection of
command line utils (written in haskell of course) for processing
tab-delimited and CSV files. It includes a util
Thanks! Good advice, I will do that.
On Sun, May 17, 2009 at 11:49 AM, Jochem Berndsen joc...@functor.nl wrote:
Keith Sheppard wrote:
I have released the first version of TxtSushi which is a collection of
command line utils (written in haskell of course) for processing
tab-delimited and CSV
I'm still learning haskell, so I may be missing something pretty
obvious, but isn't this the kind of thing that the diff array types
were created for.
http://en.wikibooks.org/wiki/Haskell/Hierarchical_libraries/Arrays#DiffArray_.28module_Data.Array.Diff.29
-Keith
On Thu, Feb 26, 2009 at
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