Comments for /dev/collective

Comment on The Non-Determinism Monad by Stacy

Stacy — Tue, 15 Dec 2009 01:23:10 +0000

Wadler’s paper ‘Comprehending Monads’ show that list comprehensions are isomorphic to the list monad, in general x-comprehensions are isomorphic to x-monads.

Comment on reStructuredText extensions by Philipp

Philipp — Fri, 07 Aug 2009 14:07:40 +0000

Great, great, great!

Although I have a lot of refactoring to do, this is simply ... great! Thanks for that, you encouraged me to play around with restructuredtext ;)

Comment on Parsing JSON with Scala by Scala articles and news roundup: year 2009 – week 20 « The Lazy Dev

Scala articles and news roundup: year 2009 – week 20 « The Lazy Dev — Sat, 16 May 2009 13:04:41 +0000

[...] http://www.turmoildrivendevelopment.com/2009/05/osgi-with-scala-java-groovy-maven-and.html http://www.hvergi.net/2008/06/parsing-json-with-scala/ http://petr.pudlak.name/drupal/cs/scala-dependency-injection [...]

Comment on Visualizing gameplaying algorithms by I. J. Kennedy

I. J. Kennedy — Wed, 15 Apr 2009 20:47:24 +0000

Fantastic.

Comment on reStructuredText extensions by Eli

Eli — Sat, 07 Mar 2009 10:41:39 +0000

Thanks for the tips. I’ve used a similar transformation partially based on your example, for my own “reST writer” for the blog.

Comment on reStructuredText extensions by Alain

Alain — Tue, 17 Feb 2009 10:22:26 +0000

Very interesting idea. I plan to use django to build a math exercice dynamic site. I would like to create a custom field that stores LaTeX source code (I need a bit more that just a formula, up to 20 lines) and an url field that points to the png image after compilation. I looked at django doc and code to find how I could implement this. In the doc of custom Field, it appears that one can only use one column in the database wheras I need to store LaTeX source and url to png image. The hash solution you use seems to take computation time each time to get the image... Moreover, it would be nice to have a custom FormField to edit LaTeX sourcewith errors treatment from compilation before saving in the database.

As you seem to be aware of some LaTeX web projects, have you any suggestion ? I searched google but your post is the closest to what I want to do...

Comment on Icelandic government math by Andreas Krey

Andreas Krey — Sun, 08 Feb 2009 21:20:58 +0000

It's just a effect; 24.6 - 19.4 = 5.2, rounded to nearest: 25 - 19 = 5. The same results from rounding down 25.0 - 19.5 = 5.5. It's not an error since in both cases the rounding is correct.

Still, when writing bills it helps to continue with the rounded values instead of the exact to avoid this effect in the sums and upset the beancounters.

Comment on The Non-Determinism Monad by Árni Hermann

Árni Hermann — Sun, 08 Feb 2009 20:04:29 +0000

This is neat indeed. For fun, you can do something similar in scala using sequence comprehensions, e.g.:

for (d1 <- 1 to 6; d2 <- 1 to 6) yield (d1+d2)

Comment on The Non-Determinism Monad by Arnar

Arnar — Sun, 08 Feb 2009 17:47:31 +0000

As an afterthought, there is another interesting (list-comprehension compatible) way of expressing that last thing:

do { d1 <- [1..6] ; d2 <- [1..6] ; op <- [(+),(*)] ; return (d1 `op` d2) }

which translates directly to a list comprehension.

Comment on The need to know by Guðmundur Bjarni

Guðmundur Bjarni — Fri, 06 Feb 2009 10:46:21 +0000

Lucas: We added the email address and captcha validations due to immense amount of spamming to our blog.

And yes OpenID and OAuth are great initiatives! Can't wait for them to become bigger, better and more widespread! :)