Hi all,
On behalf of the cabal maintainers and contributors I'm proud to announce the
Cabal (and
cabal-install) 1.18.0 release. To install run
cabal update cabal install Cabal-1.18.0 cabal-install-1.18.0
With 854 commits since the last release there are two many improvements and
I am trying to run ecliseFP to use with Haskell, but it gives an error:
SO I tried to rebuild the buildwrapper rogram to get the update, but it fails
as below. Any hints or help on what to do next?
I think that from some past problems, that theshadowed problem is from global
and usr-local
I found a nice idiom for a graph algorithm where the pairs of nodes
representing links could be merged into node lists by something like:
ns = nub $ map fst g--head nodes
ne = nub $ map snd g -- tail nodes
And found a nicer approach:
(ns,ne) = (nub***nub) unzip g
Or perhaps:
Yes, thanks, I've seen this; why can't cabal find the package?
Is the fact that it is filed under archive an indicator?!
I have tried Control.Bifunctor, and also Control.Categorical.Bifunctor, and
Data.Bifunctor.
Certainly it is an easy thing to define myself, but I'm both trying to be
Thanks for the suggestion, I’ll do that. Here goes:
I deleted the ../user/appdata/roaming/ghc and ../cabal files, an uninstalled
Haskell-platform. (No trace of anything ghc on the disk.)
Then reinstalled Haskell, and ran “cabal update”, it said there was a new
cabal-install, but trying to
OK; I took HTTP out, but still get the same error;
cabal: The following packages are likely to be broken by the reinstalls:
QuickCheck-2.4.2
haskell-platform-2012.4.0.0
Use --force-reinstalls if you want to install anyway.
One thing I notice;
Ghc reports: G:\Cabalghc --version
Thanks.
I’ll try to do another cleanup, but not sure what more I can uninstall or clean
out!
I did a system search for *ghc* and came up empty before reinstall; will try
again.
I have now managed to get from some broken packages to a broken system! ☺
They also have other comparisons at the referenced site, including for
different sizes of programs, and for counting characters or tokens instead of
lines over each of these program example groups.
The data source does include APL REBOL ( 483 different languages!), so one
could run this
Thanks to all for the comparisons between apt cabal.
Your reply basically explains why it is broken, and gives a rationale (cost and
trouble to do it), but no prognosis for repair.
My interest is in using Haskell for teaching, and so far the package system
failures often present problems that
Hmm,
Now when I tried to run Leksah, I get not only some broken packages (which I
can avoid for my current project), but:
command line: cannot satisfy -package-id
base-4.5.1.0-7c83b96f47f23db63c42a56351dcb917:
base-4.5.1.0-7c83b96f47f23db63c42a56351dcb917 is unusable due to missing or
could limit the
availability of Haskell to the largest market share of users.
---
Subject: Re: [Haskell-cafe] Cabal failures...
To: haskell-cafe@haskell.org
On 12-11-20 08:48 AM, Gregory Guthrie wrote:
It was also interesting to note a comment
I follow the Cabal-messes threads with some interest, since that is the hardest
area for me since starting to use Haskell. Probably 40-60% of all package
install fail for some mysterious reason, with threats that trying to fix them
will break more things, which generally is true. :-)
I am not
There is some interesting data in the article at:
Code Length Measured in 14 Languages
http://blog.wolfram.com/2012/11/14/code-length-measured-in-14-languages/
basically comparing program lengths in various languages, and some ensuing
discussion of how this relates to language
I did a package check, and I always get a ton of these things:
Warning: haddock-html: E:\Plang\Haskell
Platform\lib\extralibs\doc\haskell-src-1.0.1.4\html doesn't exist or isn't a
directory
Which I think is just missing documentation, so I ignore them.
But this time I also got this:
The
on multiple versions of the same
package. This is highly likely to cause a compile failure.
Why is Cabal setting both base3 and base4 to True?
P.S. You can try the same command with --solver=topdown and see if that works.
On Mon, Nov 19, 2012 at 8:22 PM, Gregory Guthrie guth...@mum.edu wrote:
Johan
I've seen a book:
The Practice Of Monadic Interpretation Dan Popa Nov. 2008
Or
Practical Monadic Interpretation Dan Popa
Which seem that they might be the same book?
As reported on Haskell Wiki/books as published in 2008, but Don't find it
available anywhere under either title.
Any pointers
---
Subject: Re: [Haskell-cafe] Best platform for development with GHC?
On Wed, 15 Jun 2011, Dmitri O.Kondratiev wrote:
Since I maintain the gnuplot binding for Haskell - what are the particular
problems with that package on Windows?
An earlier note on students reactions to the imperative style forced on them by
some Haskell libraries (do ...) is interesting, and seems similar to an
observation in a project I was developing for students; making a version of a
simple lab from previous SML assignment.
It uses a dictionary to
Yes, agree. Thanks.
But still this adds a coupling that I did not need in the SML versions.
And in this case, the analysis is word oriented, so the algorithm is
intrinsically tied to a dictionary.
---
Gregory Guthrie
.
From: Ville Tirronen [mailto:alea...@gmail.com]
Sent: Tuesday, May 17, 2011 11:33 PM
To: Gregory Guthrie
Cc: haskell-cafe@haskell.org
Subject: Re: [Haskell-cafe] Open CV or alternate image processing library for
Haskell on windows?
Hi,
Yes, I
Yes, I understand that - but if there is some install or usage dependency, or
install procedure, I would hope to see it documented somewhere; perhaps I
missed that?
The end result is that from the project page and install, it fails. :-)
Earlier in the thread I noted that this was a Windows
I wanted to look into using Haskell for an introductory Image Processing class,
but the main package used for such things (OpenCV) does not appear to be
available for windows systems.
Is there some other good option for image processing in Haskell, or has anyone
ported openCV to a windows
.
---
-Original Message-
From: Casey McCann [mailto:syntaxgli...@gmail.com]
Sent: Monday, May 16, 2011 1:18 PM
To: Gregory Guthrie
Cc: haskell-cafe@haskell.org
Subject: Re: [Haskell-cafe] Open CV or alternate image processing library for
Haskell on
windows?
On Mon, May 16
I am pretty new to Haskell, so need some clarification.
I am porting some code from SML, and getting a result that surprises me.
I basically have some functions which work like this:
f1 = fa fb fc
test1 = do print test1:
f1
But I ran a few tests, and got odd
/haskell_from_sml_question
thanks for the help.
---
-Original Message-
From: Daniel Fischer [mailto:daniel.is.fisc...@googlemail.com]
Sent: Tuesday, April 19, 2011 2:16 PM
To: haskell-cafe@haskell.org
Cc: Gregory Guthrie
Subject: Re: [Haskell-cafe
19, 2011 2:26 PM
To: Gregory Guthrie
Cc: haskell-cafe@haskell.org
Subject: Re: [Haskell-cafe] Haskell from SML - referrential Transparency?!
On Tue, Apr 19, 2011 at 4:10 PM, Gregory Guthrie guth...@mum.edu wrote:
and I get different results from the two executions (f1,f2), even
though
Thanks.
It was the no computation needed difference that I was missing, and was
including (falsely) in my expectations for same result, i.e. including the
same traces.
---
Dr. Gregory Guthrie
Computer Science Department
School of Computer Science
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