On Mar 14, 2010, at 01:53 , Carter Schonwald wrote:
sudo cabal install --extra-lib-dirs=/opt/local/lib --extra-include-
dirs=/opt/local/include hieroglyph chart
Resolving dependencies...
cabal: cannot configure Hieroglyph-3.89. It requires cairo -any,
glib -any,
gtk =0.10.0 and gtkglext -any
Daniel Fischer wrote:
I'm not sure whether it's a wart or a bug, but I agree that it would be
better to have the default sum strict
David Leimbach wrote:
That would be really inconsistent with the way the rest of the Haskell
language and libraries works...
I would propose that... sum be
On 03/13/2010 12:35 PM, Paul Johnson wrote:
On 13/03/10 10:06, Juraj Hercek wrote:
Hello,
I'm thinking about using Data.Binary to parse binary stream of data.
Binary data stream consists of messages which can have one or more
(sometimes couple of hundreds) sub-messages. The stream is spitting
Hello,
my name is Marc Migge. I would like to sign up as a student for this
year's summer of code. Could you please add me to the Trac page using
the email address marcmi...@gmx.net? Thank you.
Best regards,
Marc Migge
signature.asc
Description: OpenPGP digital signature
hrm... I'm encounter a whole slew of problems getting gtk2hs to build now,
might be snow leopard related
glib/System/Glib.hs:13:0:
Failed to load interface for `System.Glib.UTFString':
Use -v to see a list of the files searched for.
make: *** [glib/System/Glib.o] Error 1
is the
We have uploaded first pass at Windows and OS X binaries for 0.8. They are both
built using GHC 6.12.1.
Installation: Make sure ghc 6.12.1 is installed.
Take care that wget and grep are on your PATH.
Please try them out if you can and let us know if you find any issues.
-- Haddock 2.7.0
A new version of Haddock, the Haskell documentation tool, is out!
-- Changes in version 2.7.0
*
Hello Café
Some time ago I wrote a parser for a project of one our customers. The
format was proprietary and binary. The data was structured as a tree
with tables pointing to sub tables farther in the file. (Well actually
there was one or two cases where branches joined together, so I guess it
On 14 March 2010 16:03, david fries d...@gmx.ch wrote:
[SNIP]
Oddly enough, our customer never bothered to write a parser of their
own. I wonder why.
Hi David
If the binary structure was previously used only with C programs its
quite common just to use casting to unpack the data into a struct
On Sat, Mar 13, 2010 at 3:19 AM, wren ng thornton w...@freegeek.org wrote:
The usual approach I've seen is not to distinguish strict and lazy
datatypes, but rather to distinguish strict and lazy functions, e.g. by
having two different arrows: (-) for lazy functions and (!-) for strict
i currently use gtk2hs with libglade (and glade). i understand that the
gtkbuilder allows more constructs than libglade. how to use gtkbuilder in
gtk2hs? i see that John Millikin has posted a patch for gtk2hs - but i cannot
find it and no documentation for its use? can anyone point me to a
Dear Caféistas
I desperately need your collective knowledge I have been working on
porting the haskell-platform to the FreeBSD operating system for a while
now and some versioning issues have come up.
FreeBSD is still running on GHC-6.10.4 (6.12 is in the works). The ghc
package contains a
Hi Stephen
Perhaps my description of the format was a bit unclear. When I said
pointer I simply meant a number which is the position in the stream.
Imagine the tables looking something like this:
RootTable
HeaderMagicNumber (1Byte): 0x50
VersionNumber (2 Bytes): 1234
SubTablePointer
My patch was accepted into gtk2hs trunk. It should be present in the
next release, or you can clone the in-development version with Darcs
(see http://www.haskell.org/gtk2hs/development/ ).
The Haskell module can be viewed at
http://code.haskell.org/gtk2hs/gtk/Graphics/UI/Gtk/Builder.chs.pp ;
On Sun, Mar 14, 2010 at 3:49 PM, David Waern david.wa...@gmail.com wrote:
...
-- Changes in version 2.7.0
...
* Bug fixes (most importantly #128)
...
Nice!
Ross, can this be installed on hackage? Because the documentation of
the base library is suffering from bug #128:
Andrew U. Frank fr...@geoinfo.tuwien.ac.at writes:
i currently use gtk2hs with libglade (and glade). i understand that the
gtkbuilder allows more constructs than libglade. how to use gtkbuilder in
gtk2hs? i see that John Millikin has posted a patch for gtk2hs - but i cannot
find it and no
Hi David
Ah ha - this form of binary file layout is quite common (e.g. PECOFF
object files and OpenType / TrueType fonts).
Parsec and other parsing libraries are perhaps not ideal for the task,
as they consume input as they parse. I have my own alternative to
Parsec - Kangaroo [1] - for parsing
Is there a library function that will create two lists from one based on a
predicate, one list for all elements that satisfy the predicate and one for all
that do not? Don't want to reinvent the wheel.
Michael
___
Haskell-Cafe mailing list
Hi Michael
Data.List.partition - from the docs...
partition :: (a - Bool) - [a] - ([a], [a]) Source
The partition function takes a predicate a list and returns the pair
of lists of elements which do and do not satisfy the predicate,
respectively; i.e.,
partition p xs == (filter p xs, filter
On Sun, Mar 14, 2010 at 12:26 PM, michael rice nowg...@yahoo.com wrote:
Is there a library function that will create two lists from one based on a
predicate, one list for all elements that satisfy the predicate and one for
all that do not? Don't want to reinvent the wheel.
Michael
Most excellent! Thanks.
Michael
--- On Sun, 3/14/10, Stephen Tetley stephen.tet...@gmail.com wrote:
From: Stephen Tetley stephen.tet...@gmail.com
Subject: Re: [Haskell-cafe] Splitting list with predicate
To: michael rice nowg...@yahoo.com
Cc: haskell-cafe@haskell.org
Date: Sunday, March 14,
Most excellent! Thanks.
I frequently use Hoogle[1] when I need a function, that I think must
exist, but do not know how it is named. Try:
(a - Bool) - [a] - ([a], [a])
With the recipe from [2] you may even invoke hoogle from within ghci:
ghci :hoogle (a - Bool) - [a] - ([a], [a])
Hope that
Yep, That's what I had in mind. Thanks for the link.
On Sun, 2010-03-14 at 19:09 +, Stephen Tetley wrote:
Hi David
Ah ha - this form of binary file layout is quite common (e.g. PECOFF
object files and OpenType / TrueType fonts).
Parsec and other parsing libraries are perhaps not ideal
Thanks all,
Wouldn't one need to know the order of the arguments?
(a - Bool) - [a] - ([a], [a])
Michael
--- On Sun, 3/14/10, Simon Hengel simon.hen...@wiktory.org wrote:
From: Simon Hengel simon.hen...@wiktory.org
Subject: Re: [Haskell-cafe] Splitting list with predicate
To: michael rice
Am Sonntag 14 März 2010 21:19:19 schrieb michael rice:
Thanks all,
Wouldn't one need to know the order of the arguments?
(a - Bool) - [a] - ([a], [a])
hoogle also lists functions with similar types, so it probably also would
find partition if you searched for a function of type
[a] - (a -
Wouldn't one need to know the order of the arguments?
(a - Bool) - [a] - ([a], [a])
Not really, if you try
[a] - (a - Bool) - ([a], [a])
it will yield the exact same list of results.
Cheers.
___
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
The first question is what does 'all the combinations' actually MEAN?
We are told that
f [a,b,c] [d,e,f] [g,h,i] =
[[(a,d,g),(b,e,h),(c,f,i)], ...]
in which the first element of the result is just
zip3 [a,b,c] [d,e,f], [g,h,i]. But what are the
other elements? Why is all
so the solution turns out to be (for those who are macports users) to build
of the macports stuff related gtk2 et al as the variants +universal (sadly
parts of +quartz and +no_x11 seems to be slightly broken), to make sure that
macports also has built gtksourceview2 (somehow trying to use
Sebastian Fischer s...@informatik.uni-kiel.de wrote:
(Choosing names that are
misleading or flat out wrong is of course always a bad idea.)
foo = f . g . h where
f x = ...
g x = ...
h x = ...
Sometimes laziness is just the clearest option.
--
(c) this sig last receiving data
We just had a big old web dev discussion in #darcs, which made me want to hang out in #haskell-web and hear more of the
same. I think it existed briefly and died, but maybe it's time to try again ?
Normally I don't like removing interesting chat from the main channel, but #haskell is often
Hi,
I've been trying to use Control.Concurrent.mergeIO to parallelize
computation, and can't make it work. In the sample program below, I expect
the function 'parallelTest' to be almost twice as fast as 'sequentialTest',
and to compute its results in two threads, as implied by the documentation
On Mar 14, 2010, at 06:46 , Carter Schonwald wrote:
hrm... I'm encounter a whole slew of problems getting gtk2hs to
build now, might be snow leopard related
glib/System/Glib.hs:13:0:
Failed to load interface for `System.Glib.UTFString':
Use -v to see a list of the files searched
Cool. Will keep that in mind next time I'm looking for an operation but don't
know what it's called.
Michael
--- On Sun, 3/14/10, Simon Hengel simon.hen...@wiktory.org wrote:
From: Simon Hengel simon.hen...@wiktory.org
Subject: Re: [Haskell-cafe] Splitting list with predicate
To: michael rice
OK, I think I figured it out. If I understand correctly, I was just
computing the input lists in parallel. The actual values were computed in
the main thread lazily, later. This seems unintuitive to me. Shouldn't the
merge functions force the evaluation of their arguments? Surely one wouldn't
be
The essence of mergeIO is to merge the _lists_ that are produced by
independent threads. As far as Haskell is concerned, the elements in the list
are another matter, as is the evaluation of those elements.
So the merge functions force the evaluation of their arguments to a certain
extent.
On the same topic, some of us have started moving web discussions back over
to web-devel mailing list. Looks like it's a fun time to be doing web
development in Haskell :).
Michael
On Sun, Mar 14, 2010 at 2:13 PM, Simon Michael si...@joyful.com wrote:
We just had a big old web dev discussion
Not sure I'm even in the right neighborhood with this. Need to screen for
integer data.
Am I going about this correctly?
Michael
==
[mich...@localhost ~]$ ghci
GHCi, version 6.10.4: http://www.haskell.org/ghc/ :? for help
Loading package ghc-prim ... linking ... done.
Loading package
zaxis z_a...@163.com wrote in article 27844016.p...@talk.nabble.com in
gmane.comp.lang.haskell.cafe:
As we know, the local variable is allocated on stack which is thread
safe.
It's not.
http://en.wikipedia.org/wiki/Funarg_problem#Example
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