On 10/01/2013 07:58 AM, Michael Snoyman wrote:
I'm wondering if anyone's run into this problem before, and if there's a
common solution.
In Yesod, we have applicative forms (based originally on formlets).
These forms are instances of Applicative, but not of Monad. Let's
consider a situation
On 09/27/2013 04:32 AM, Conal Elliott wrote:
I'm polling to see whether there are will and expertise to reboot
graphics and GUIs work in Haskell. I miss working on functional graphics
and GUIs in Haskell, as I've been blocked for several years (eight?) due
to the absence of low-level
On 09/11/2013 03:45 PM, Twan van Laarhoven wrote:
Why does every section have a title=1.2.3 foo on the outer div? In
Firefox this shows up as a useless tooltip when moving the mouse over
the text.
That's the same with the official document. I think it's a feature of
whatever tool is used to
On 09/10/2013 06:31 AM, Charlie Paul wrote:
I've been looking through Edward Kmett's lens library, and I'm a bit
befuddled about Getters. In my own code, why would I want to have
something be a Getter instead of a plain function? As far as I can see,
a plain function is simpler to use, and can
On 08/08/2013 05:05 PM, Tom Ellis wrote:
On Thu, Aug 08, 2013 at 03:38:41PM +0200, Jerzy Karczmarczuk wrote:
One could simply implement IO as a free monad
Interesting. I wonder how.
See [1] for an explanation of free monads in general
You're lacking a matching definition of [1] :)
On 07/16/2013 09:57 PM, Michael Orlitzky wrote:
I have a common pattern in my command-line programs; I start out with a
configuration data type, which over-simplified looks like:
data Cfg = Cfg { verbose :: Bool }
Now, there's usually a default configuration,
default :: Cfg
On 07/11/2013 05:52 PM, Just wrote:
On 07/10/2013 11:44 PM, Ertugrul Söylemez wrote:
A very simple way to do this is to use integralLim_ instead of
integral_. It allows the ball itself to handle the bouncing. A less
invasive way (i.e. you can add it to your example) is to use the (--)
On 07/01/2013 08:38 PM, David Fox wrote:
Should I keep posting updates in this thread?
Yes please, I'm interested in following this development! That, or get
yourself a blog and let us all know where to point our RSS readers.
- Ollie
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On 18 Jun 2013 15:34, Edward Kmett ekm...@gmail.com wrote:
I'm looking forward to seeing what we can accomplish together this year!
+1 - best of luck, students !
Ollie
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On 13 Jun 2013 06:51, Michael Xavier mich...@michaelxavier.net wrote:
I'm pleased to announce the release of Angel 0.4.2 and that I have
officially taken over maintainership of this project. Thanks to Jamie
Turner for starting such a great project and allowing me to take over this
project.
Hi
On 05/09/2013 12:56 PM, Johannes Waldmann wrote:
http://hackage.haskell.org/package/intern
what does this package do? OK, I can read efficient hash consing
but what does it mean exactly? and how would I actually use it?
I can't tell you what it does, but there is an example -
On 04/16/2013 11:24 AM, Tom Ellis wrote:
On Tue, Apr 16, 2013 at 10:17:48AM +0100, Tom Crayford wrote:
I kept on running into this thing where I was calling error in quickcheck
to get good error messages about the things I was comparing. In Java land,
this stuff is handled by Hamcrest: a
On 04/16/2013 01:47 PM, Lyndon Maydwell wrote:
You could do:
runKleisli . mconcat . map Kleisli :: Monoid (Kleisli m a b) = [a -
m b] - a - m b
Would that work for you?
I can't find an instance for Monoid (Kleisli m a b) in `base`, so
presumably the author would also have to write this
On 04/08/2013 06:30 AM, Stefan Holdermans wrote:
* Your friends and colleagues describe you as a rockstar programmer;
your programming ability is way above average;
Good luck hiring smart people.
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On 03/18/2013 08:49 PM, Johan Tibell wrote:
[bcc: hask...@haskell.org mailto:hask...@haskell.org]
We should make sure that we apply for Google Summer of Code this year
as well. It's been very successful in the previous year, where we have
gotten several projects funded every year.
Definitely
On 02/25/2013 10:47 AM, Malcolm Wallace wrote:
There are lots of Haskell CSV parsers out there. Most have poor
error-reporting, and do not scale to large inputs. I am pleased to announce an
industrial-strength library that is robust, fast, space-efficient, lazy, and
scales to gigantic
On 02/17/2013 03:01 PM, Sergey Mironov wrote:
Hi folks. Hackage contains several JSON packages but as far as I see,
they all provide 'static' conversion from JSON format to Haskell data
type. Is there a method of converting object containing optional filed
'a' to for example Maybe a.
Assuming
Hello,
In summary, i'm working on an application that responds to a users query, a
sequence index, with the union of a list of UUIDs that have changed
since that
same sequence index, split into 6 sections. I wish to respond to these
queries
via JSON to provide an easy to use web service, and
Urgh, the formatting got totally destroyed in sending, I think. If so,
here's a paste of my email as I intended it to be sent:
http://hpaste.org/81648
Sorry about that!
- Ocharles
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On 02/01/2013 01:44 PM, Bas van Dijk wrote:
If I make a special case for text based UUIDs in aeson:
data Value = ... | UUID Text | ...
Data.Aeson.Encode.fromValue (UUID s) = singleton '' fromText s
singleton ''
Then encoding time improves by 20%.
So a big part of the time is spent
Hello,
I'm currently trying to implement a way 3 way merge, that is dispatched
on type. Essentially, I want to be able to say I have this large data
type which is a product of various other types - here's how to merge
it.
By 3 way merge, I mean that I have a 'new' value, a 'current' value and
a
Hi
I'm working on a little experiment at the moment: using monadic
QuickCheck to test the integration of my code and the database. I see
some of my functions having properties like - given a database in this
state, selectAll should return all rows, and so on. My initial attempt
has worked nicely,
Hi, I'm not sure it directly helps, but I had a bit of trouble getting
off the ground with Aeson too. Here's some of my code using Aeson, maybe
there will be something in here that helps you?
https://github.com/ocharles/BookBrainz/blob/master/src/BookBrainz/Search.hs
- Ollie
Paul Koerbitz paul.koerb...@gmail.com writes:
Hello,
TL;DR: If you have some time try emacs, the viper / vimpulse plugins are
pretty good and the editor is awesome in general. Haskell indentation is
good.
Not to go too off topic, but I'm not sure people are aware there's
another Vim
Hi!
I've just spent my evening trying to use QuickCheck properties to test
the database accessing functions in a project I'm working on at the
moment. I've got some stuff that's working, and I wanted to see what the
cafe thought about it, and if anyone had any suggestions or critiscm
that can
everything
being in the IO monad, but as I said - Haskell is new to me.
All of my work is at [3], and I'd love any advice you have. Haddock
documents have been exported to ocharles.org.uk [4].
Thanks for your time,
Oliver Charles / ocharles
--
[1]: http://xapian.org/docs/apidoc/html
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