Re: [Haskell-cafe] What's the problem with iota's type signature?
On 28/05/2009 04:33, michael rice wrote: Still exploring monads. I don't understand why the type signature for double is OK, but not the one for iota. Michael = --double :: (Int a) => a -> Maybe b --double x = Just (x + x) iota :: (Int a) => a -> [b] iota n = [1..n] --usage: [3,4,5] >>= iota --should produce [1,2,3,1,2,3,4,1,2,3,4,5] iota is executed within the monad and as such must respect its law ? ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Haskell in 3 Slides
On 21/05/2009 09:40, Kalman Noel wrote: Joe Fredette schrieb: 3-4 slides imply 3-4 topics, so the question is what are the 3-4 biggest topics in haskell? I would think they would be: * Purity/Referential Transparency * Lazy Evaluation * Strong Typing + Type Classes * Monads If the goal is to be able to talk about different examples of Haskell code in the rest of the presentation, the big topic I'd choose would be called »How function definitions look like in Haskell«. Kalman ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe My bet : - type system without the type classes but with comparision with usual (c++) type systems. - function definitions, with a hint at pattern matching - lazyness. (see the searching a maybe list on the begineer list, it is a very good example). - advanced topic : monads, type classes, etc -> just to say they are here and describe what they allow (state, exception), etc. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Employment
That fits with our experience (gamr7). We got 20 applicants, all of them very good. L. Paul Johnson wrote: Tom Hawkins wrote: Such a database would help me counter by boss's argument that "it's impossible to find and hire Haskell programmers." There was a thread last week where someone asked who would be interested in a hypothetical Haskell job. He got about 20 positive responses. This agrees with the experience of Microsoft Research in 2006 when they advertised for a third person to help with GHC development. They also had about 20 applicants. So next time I hear the "you can't get the programmers" line I'm going to respond with something like this: "If you post an advert for a Haskell developer you will get 20 applicants. All of those people will be the kind of developer who learns new programming languages to improve their own abilities and stretch themselves, because nobody yet learns Haskell just to get a job. "If you post an advert for a Java developer you will get 200 applicants. Most of them will be the kind of developer who learned Java because there are lots of Java jobs out there, and as long as they know enough to hold down a job then they see no reason to learn anything." Paul. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe -- Best Regards, lionel Barret de Nazaris, Gamr7 Founder & CTO = Gamr7 : Cities for Games http://www.gamr7.com ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Re: Haskell project proposals reddit
Reddit is not moderated.
But there is a difference between the new links and the top links.
There you are :
http://www.reddit.com/r/haskell_proposals/comments/7ijor/a_library_or_embedded_language_for_interactive/
(upmodded)
Benjamin L.Russell wrote:
On Tue, 9 Dec 2008 20:34:20 -0800, Don Stewart <[EMAIL PROTECTED]>
wrote:
I'd like to echo Jason's remarks earlier.
http://www.reddit.com/r/haskell_proposals/
We've tried for a couple of years now to efficiently track 'wanted
libraries' for the community, but never with much success.
In particular, two approaches have been tried:
* a wiki page
* the 200{6,7,8} summer of code trac
neither proved workable long term, likely because no one knew about
them, they're harder to contribute to and other factors.
Now I know there's a lot of spare Haskell capacity in this community.
3000 mailing list readers, but only 70 new libraries a week being
uploaded to Hackage --- that's not how we take over the world!
So this is your chance to contribute:
* propose new libraries, and explain why you'd want them
* vote on things you'd like to see
* pick up tasks that sound interesting
Let's try to make this work!
After just registering and proposing "A library (or "embedded
language") for interactive animations with 2D and 3D graphics and
sound to replace Fran," thirteen minutes have passed, but my proposal
hasn't appeared yet.
Is your proposal list at http://www.reddit.com/r/haskell_proposals/
moderated?
-- Benjamin L. Russell
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[Haskell-cafe] gmp license == no commercial/closed source haskell software ??
I've just discovered the GMP license problem. (see http://hackage.haskell.org/trac/ghc/wiki/ReplacingGMPNotes) From my understanding, the gmp is GPL, GHC statically links it on windows. As a consequence, any program compiled using GHC must be distributed under a GPL compatible license. In the threads I've read, some workarounds are proposed on linux and OsX, but I didn't see anything on windows. Is the situation still the same ? Does anybody know a work-around to make a closed-source programm in haskell without violating the GPL ? ( Note this could block Haskell in our company. ) -- Best Regards, lionel Barret de Nazaris, = Gamr7 : Cities for Games http://www.gamr7.com ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Haskell Reddit
AFAIK, there are two public on this haskell reddit : haskeller and curious about haskelle (evolving pythonneers ?). So anything goes. (Don : you post a lot. Is that part of your morning routine ?) L. Don Stewart wrote: I'm not sure if the cafe@ knows this, but there's a bit of a Haskell community (1200+ subscribers) built up around the Haskell subreddit on reddit.com, http://www.reddit.com/r/haskell/ A good source for news other than what appears on Planet Haskell. -- Don P.S. Feel free to submit things you like, so I don't have to :-) ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe -- Best Regards, lionel Barret de Nazaris, Gamr7 Founder & CTO = Gamr7 : Cities for Games http://www.gamr7.com ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Python's big challenges, Haskell's big advantages?
Amen, Those are the hard question that the python community needs to answer (I am not sure they want to answer, tho). They are also part of the reasons we are switching to Haskell. L. Don Stewart wrote: http://www.heise-online.co.uk/open/Shuttleworth-Python-needs-to-focus-on-future--/news/111534 "cloud computing, transactional memory and future multicore processors" Get writing that multicore, STM, web app code! -- Don ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe -- Best Regards, lionel Barret de Nazaris, Gamr7 Founder & CTO = Gamr7 : Cities for Games http://www.gamr7.com ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] haskell job offer.
Thank you for the warm welcome. About the use of Haskell, it will be for our (urban) rule-based generation engines (there is a recursive stack of them). Think about a declarative geographic compiler and you're on the right track. This engines are not in Haskell right now but it *should* be because for it we have reproduced many Haskell features (monads, lazy evaluation and so on). Greenspun's Tenth Rule (for Haskell) is really at work there. The first task on the job will be to port one of the engine. But this is only the tip of the iceberg... The final goal is to generate in real time an infinite city with as much detail as the current top games. And, obviously, to able to create that in an afternoon :). So you see, there is many interesting things to do. -- Lionel -- Best Regards, lionel Barret de Nazaris, Gamr7 Founder & CTO = Gamr7 : Cities for Games http://www.gamr7.com Don Stewart wrote: And for those who didn't see the original release announcement, check out their website.. http://gamr7.com/ That's kind of awesome. Could you say more about what you're using Haskell for, Lionel? -- Don dons: Welcome to the community! I've added details about Gamr7 to the industry page, http://haskell.org/haskellwiki/Haskell_in_industry -- Don lionel: We (Gamr7, see at the bottom) are looking from a senior dev/Technical director. We don't really care about the title but we want someone good (who doesn't ?). We need someone able to model *and* code well (No architect who never codes). The ability to communicate well with a team is also a big plus. You don't need to speak French (we are in France) but a reasonably good English is mandatory. If You : • like coding 4+ hours straight. • like to solve a coding problem elegantly (and are bothered if can't) • like and read *real* CS books (SICP, EGB, TAOCP, etc...) • code in Haskell, python and c++. • are a gamer (this one is optional) • are interested in computer graphics (optional too) You fit the bill. We would like to talk to you. Contact us (contact at gamr7 dot com). What we offer: • interesting problems and creative freedom • quality of life (no overtime, sunny countryside, French food and low rent) • a pay in Euros • comfortable workplace, etc... • coding in Haskell, python. The boss *really * codes . He likes Haskell, Python, Reddit, and wants the team to be there for the long run (i.e happy). He also modestly wrote and posted this jobs offer. About : Gamr7 is a startup focused on procedural city generation for the game and simulation market. We are located in France, near Lyon. -- Best Regards, lionel Barret de Nazaris, Gamr7 Founder & CTO = Gamr7 : Cities for Games http://www.gamr7.com ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] haskell job offer.
We (Gamr7, see at the bottom) are looking from a senior dev/Technical director. We don't really care about the title but we want someone good (who doesn't ?). We need someone able to model *and* code well (No architect who never codes). The ability to communicate well with a team is also a big plus. You don't need to speak French (we are in France) but a reasonably good English is mandatory. If You : • like coding 4+ hours straight. • like to solve a coding problem elegantly (and are bothered if can't) • like and read *real* CS books (SICP, EGB, TAOCP, etc...) • code in Haskell, python and c++. • are a gamer (this one is optional) • are interested in computer graphics (optional too) You fit the bill. We would like to talk to you. Contact us (contact at gamr7 dot com). What we offer: • interesting problems and creative freedom • quality of life (no overtime, sunny countryside, French food and low rent) • a pay in Euros • comfortable workplace, etc... • coding in Haskell, python. The boss *really * codes . He likes Haskell, Python, Reddit, and wants the team to be there for the long run (i.e happy). He also modestly wrote and posted this jobs offer. About : Gamr7 is a startup focused on procedural city generation for the game and simulation market. We are located in France, near Lyon. -- Best Regards, lionel Barret de Nazaris, Gamr7 Founder & CTO = Gamr7 : Cities for Games http://www.gamr7.com ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
