cairo
http://hackage.haskell.org/package/Chart-diagrams
Tim Docker
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On 14/06/12 18:36, Peter Simons wrote:
it might be of interest to know that the Nix package manager [1] offers that
functionality too, but it can install such Haskell environments on all Linux
variants and on MacOS X without requiring superuser privileges.
Is this actually the case? When I tri
Chart-0.9 is now available via hackage and a darcs repository.
This is a library for drawing 2D charts. It relies upon the haskell
cairo binding that is part of gtk2hs, and hence supports several
backend output formats (png, pdf, ps, etc).
Further information is available here:
http://docker
A post to announce that Chart-0.6 is now available from it's darcs
repository and from hackage.
This is a library for drawing 2D charts. It relies upon the haskell
cairo binding that is part of gtk2hs, and hence supports several
backend output formats (windows, png, pdf, ps, etc).
I'm announcing
I've just uploaded to hackage a step-based music sequencer, called
"hbeat". It's little more than a toy, but it's fun. It ought to be
cross platform, though has been built and tested solely on linux.
Given that it's only 400 or so lines, it may be a useful example for
anyone wanting to comb
I'm making available the current state of my 2D charting library for
haskell. It's still at quite an early stage, but may prove useful. At
present it has:
- line charts, points charts, fills, and combinations.
- Automatic layout sizing and adjustment.
- Auto scaling of axis ranges
Robert Dockins wrote:
> All we have to do is be ready for it when it arrives.
> When people see that, using Haskell, they can write programs using 1)
> fewer man-hours with 2) fewer bugs which 3) scale effortlessly to
> highly parallel hardware to beat the pants off C/C++/Java/what-have-
>
[EMAIL PROTECTED] wrote:
> Incidentally, the difficulty with finalizers was precisely the
> argument for using enumerators rather than cursors in database
> APIs. Takusen has implemented that idea; takusen currently supports
> Sqlite, PostgreSQL and Oracle, has a test suite. Its performance test
>
Keith Wansbrough wrote:
> s/fail/error/
> s/return//
>
> Then you can easily write
>
> > I can't (easily) write
> >
> > text c = sqr x + sqr (x+1)
>
> You just can't *catch* this outside the IO monad.
Of course... that was my second alternative error
strategy. I'm interest in how/when peo
Philippa Cowderoy wrote:
> The ability to fail doesn't need the do notation, just use of
> return for success - similar for propagating failure.
I'm not sure I understand. Do you mean writing functions
like:
sqr x | x < 0 = fail "less than zero"
| otherwise = return (sqrt x)
Keith Wansbrough wrote:
> Read the paper _A Semantics for Imprecise Exceptions_. The
> problem is that the evaluation order of Haskell would have to
> be fixed for this not to lose referential transparency. What
> is the value of
>
> catchExcept (show (makeExcept "E1" + makeExcept "E2"))
>
(Apologies for previous incomplete post: Here's the whole thing)
One thing that bugs me about the named record syntax, is that with a datatype:
data T = T {
t_f1 :: X,
t_f2 :: X
};
the function t_f1 has the type of an "accessor", ie
t_f1 :: T -> X
but there doesn't any tidy wa
One thing that bugs me about the named record syntax, is that with a datatype:
data T = T {
t_f1 :: X,
t_f2 :: X
};
the function t_f1 has the type of an "accessor", ie
t_f1 :: T -> X
but there doesn't any tidy way to get at the "mutator" function
t_f1' :: X -> T -> T
w
Jerzy Karczmarczuk wrote:
> Presumably this reviewer has his particular visions what a science
is,
> but I don't believe that such people dominate in the milieu of FPL.
> I believe that it would be interesting to organize some workshops
> on "practical" applications of functional programmi
Congratulations on the new release. But out of curiosity, I've got to
ask...
Why is the test suite now driven by a python script? Is this a
niche where a 'scripting' language was deemed more suitable than
haskell?
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