Re: [Haskell-cafe] Long pauses / idle time in a Haskell TCP server

, or the new scalable server based on conduit on github? I'd recommend switching to the github version if not. A few key bugs exist in the older implementation.) - Jamie ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman

Re: [Haskell-cafe] Significant slow-down in parallel code?

I am using 6.12... are there any good pointers as to how one uses threadscope? On Mon, Jan 4, 2010 at 3:14 PM, Neil Mitchell ndmitch...@gmail.com wrote: Hi Jamie, First question, what version of GHC are you using? There are significant performance improvements to parallel code in GHC 6.12

[Haskell-cafe] Significant slow-down in parallel code?

machine). Very little time is being spent using the garbage collector. Any suggestions? Thanks, -Jamie ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

[Haskell-cafe] simple type?

Hello; I am writing some vectorized code, and I wondered exactly which types can be used in DPH? Is it true one cannot use data constructors and recursive types? Thanks, -Jamie ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http

[Haskell-cafe] Re: no sparks?

benj...@gmx.net wrote: Daniel Fischer schrieb: Am Sonntag 20 Dezember 2009 23:25:02 schrieb Jamie Morgenstern: Hello; Also, I was wondering if something akin to a parallel or exists. By this, I mean I am looking for a function which, given x : a , y : a, returns either, whichever

[Haskell-cafe] no sparks?

computation returns first. Can I use strategies to code up something like this? I suppose this doesn't play nicely with the idea of determinism, but thought it might be worth asking anyway. Thanks, -Jamie proposition.hs Description: Binary data ___ Haskell

Re: [Haskell-cafe] Re: no sparks?

I did compile with -threaded. On Sun, Dec 20, 2009 at 5:42 PM, Maciej Piechotka uzytkown...@gmail.comwrote: On Sun, 2009-12-20 at 17:25 -0500, Jamie Morgenstern wrote: Hello; I am writing a parallel theorem prover using Haskell, and I am trying to do several things. As a first

Re: [Haskell-cafe] [GSOC] About Implementing Maps using generalized tries project idea

should be: Documentation + examples (which I'm willing to help with if there is interest) Systematic benchmarks Integration with the edison api, to encourage a single collection api on hackage Jamie ___ Haskell-Cafe mailing list Haskell-Cafe

[Haskell-cafe] The Curse of Our Times in different languages

See Black-Scholes model/option formula being implemented in different languages including Haskell. http://www.espenhaug.com/black_scholes.html Jamie ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman

Re: [Haskell-cafe] Left fold enumerator - a real pearl overlooked?

Can someone point us to some resources about these? I for one have not heard of them before http://okmij.org/ftp/Streams.html#iteratee is probably the best place to start. Jamie ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http

Re: [Haskell-cafe] A typeclass for Data.Map etc?

one map interface lying around. Jamie ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] Re: [Haskell] ANNOUNCE: first Grapefruit release

, it might be better to write a Win32-based backend for Grapefruit instead of a wxWidgets-based one. What do you think about that? Win32-based backend would make more sense as it is one less layer to deal with. But how? Same thing with Mac. Jamie Best wishes

[Haskell-cafe] Re: [Haskell] ANNOUNCE: first Grapefruit release

to port Gtk2Hs widgets to Grapefruit. Awesome! I'll be looking forward start using Grapefruit soon! :) Thanks Jamie Best wishes, Wolfgang Jamie Clark___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org

Re: [Haskell-cafe] Re: [Haskell] ANNOUNCE: first Grapefruit release

On Mon, 16 Feb 2009, Wolfgang Jeltsch wrote: [redirecting to haskell-cafe] Am Sonntag, 15. Februar 2009 00:25 schrieben Sie: Hi Wolfgang, I was wondering if I can use FLTK as GUI backend for Grapefruit? This should be possible in principal. It just could be that my assumptions about how

Re: [Haskell-cafe] Re: [Haskell] ANNOUNCE: first Grapefruit release

On Mon, 16 Feb 2009, Wolfgang Jeltsch wrote: [redirecting to haskell-cafe] Am Sonntag, 15. Februar 2009 00:26 schrieben Sie: One more thing, would Grapefruit work with files created by Glade (UI builder)? No, it won’t, I’m afraid. There is, for example, the principal problem that Glade is

Re: [Haskell-cafe] Re: [Haskell] Google Summer of Code 2009

? Theora codec is being used in Ekiga (popular SIP/H.323 video softphone but that thing keeps crashing on me :( ) Jamie Conrad. gtener: On Wed, Feb 11, 2009 at 21:00, Jamie hask...@datakids.org wrote: Hi Gwern, On Wed, 11 Feb 2009, Gwern Branwen wrote: I just checked H.263

Re: [Haskell-cafe] Re: [Haskell] Google Summer of Code 2009

On Thu, 12 Feb 2009, Achim Schneider wrote: Jamie hask...@datakids.org wrote: For Theora playback we've found that the largest CPU load comes from colorspace conversion, where the YUV output of the codec needs to be converted to RGB for some targets (like Firefox). That is some fairly

Re[2]: [Haskell-cafe] Re: [Haskell] Google Summer of Code 2009

Hi Bulat, On Wed, 11 Feb 2009, Bulat Ziganshin wrote: Hello Jamie, Wednesday, February 11, 2009, 5:54:09 AM, you wrote: Seems like it is ok to write H.264 in Haskell and released via GPL license? anyway it's impossible due to slow code generated by ghc I see, I guess I'll have to stuck

Re: [Haskell-cafe] Re: [Haskell] Google Summer of Code 2009

Seems like it is ok to write H.264 in Haskell and released via GPL license? There is theora.org but H.264 would be ideal.  Ditto for H.263. Software patent issues are entirely orthogonal to the copyright issues of who wrote what under which license. That's why software patents suck so very

Re: [Haskell-cafe] Re: [Haskell] Google Summer of Code 2009

in/out for decoding. That could be a seed to create Haskell library of video/audio codecs. One mentioned that C based ffmpeg library is buggy with memory leaks left and center (and probably right too :) Ouch! gwern Jamie ___ Haskell-Cafe

[Haskell-cafe] Re: [Haskell] Google Summer of Code 2009

What I would like to see is H.264 video codec in Haskell. H.264/MPEG-4 is getting very popular nowadays and it would be great to have encoder and decoder in haskell. Can use x264 (encoder) and ffmpeg (en/de coder) as a base to start with. Jamie

Re: [Haskell-cafe] Re: [Haskell] Google Summer of Code 2009

On Tue, 10 Feb 2009, Conrad Meyer wrote: On Tuesday 10 February 2009 07:18:00 am Jamie wrote: What I would like to see is H.264 video codec in Haskell. H.264/MPEG-4 is getting very popular nowadays and it would be great to have encoder and decoder in haskell. Can use x264 (encoder

[Haskell-cafe] Video phone application

in advance! Jamie ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] Video phone application

input and shared network connection. What is ideal way to deal with this in Haskell? Thanks! Jamie ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] FP simulators for real-time systems?

state makes it much easier to automate reasoning about code. Jamie On Mon, Feb 2, 2009 at 6:43 PM, Lee Pike leep...@gmail.com wrote: Hello, I'm interested to hear if anyone out there has used Haskell (or other functional languages for that matter) to build simulators for real-time systems

Re: [Haskell-cafe] real haskell difficulties (at least for me)

are planned and what stage the current work is at? I remember seeing some demos at anglohaskell during the summer but nothing since. Jamie On Tue, Jan 13, 2009 at 3:33 PM, Regis Saint-Paul regis.saint-p...@create-net.org wrote: Hi, I've seen many times the monad topic coming around on the cafe

Re: [Haskell-cafe] #haskell IRC channel reaches 600 users

and irc. It makes people seem more human and hence harder to flame. Jamie On Fri, Jan 2, 2009 at 8:27 PM, Don Stewart d...@galois.com wrote: A small announcement :) 7 years after its inception, under the guiding hand of Shae Erisson (aka shapr), the #haskell IRC channel[1] on freenode has reached

Re: [Haskell-cafe] OT: representations for graphs

here: http://web.comlab.ox.ac.uk/teaching/materials08-09/probabilistic/19-symbolic.pdf If you skip to page 42 theres a table comparing memory use with traditional sparse representations. Jamie On Fri, Dec 19, 2008 at 5:07 PM, Bayley, Alistair alistair.bay...@invesco.com wrote: (OT, but I'm hoping

Re: [Haskell-cafe] pure programs

You're essentially describing functional reactive programming. You end up with the system being described as pure, reactive values and plugging IO based streams in at the edges. Have a look at the wiki description (http://www.haskell.org/haskellwiki/Functional_Reactive_Programming) and especially

Re: [Haskell-cafe] Spine-lazy multiqueue

Ideas for how to make such tries composable would encourage me to release a hackage module :-) Have a look at code.haskell.org/gmap/api - a library for composable maps. It currently requires huge instances in the name of efficiency but I hope to improve that over the next couple of months. The

Re: [Haskell-cafe] Re: Red-Blue Stack

I am afraid, but this does not give constant amortized time. sendEmail :: ProperlyThoughtOut Idea - IO () Clearly my brain lacks a type checker. Jamie ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo

Re: [Haskell-cafe] Red-Blue Stack

, for this kind of question you'll get help much faster if you ask on #haskell. Jamie On Thu, Sep 25, 2008 at 5:11 AM, Matthew Eastman [EMAIL PROTECTED] wrote: Hey guys, This is probably more of a question about functional programming than it is about Haskell, but hopefully you can help me out. I'm new

Re: [Haskell-cafe] Architecturally flawed

the byestring part up to date).I dont yet know how fast it is but I will be tweaking it over the next month or so. Jamie ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

[Haskell-cafe] Planet haskell

I was hoping to have my summer of code blog added to planet haskell but [EMAIL PROTECTED] no longer seems to exist. Hopefully the owner is subscribed to this list? Jamie ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org

[Haskell-cafe] Crash in Data.ByteString.Lazy.hPut

Data.Binary.Put import qualified Data.ByteString.Lazy as B simpleImage = take tot (map (\x - x `mod` 256) [1..]) where tot = 640 * 480 main = do output - openFile test.tmp WriteMode B.hPut output $ runPut $ mapM_ putWord8 simpleImage -- Jamie Love Senior Consultant Aviarc Australia Mobile: +61

Re: [Haskell-cafe] Crash in Data.ByteString.Lazy.hPut

are good -- they can prevent bugs caused by an unexpected type being inferred). This message has been scanned for viruses and dangerous content by MailScanner and is believed to be clean. -- Jamie Love Senior Consultant

Re: [Haskell-cafe] Crash in Data.ByteString.Lazy.hPut

This message has been scanned for viruses and dangerous content by MailScanner and is believed to be clean. -- Jamie Love Senior Consultant Aviarc Australia Mobile: +61 400 548 048

Re: [Haskell-cafe] Crash in Data.ByteString.Lazy.hPut

Just to clarify, I know it was my mistake, and so I'm not blaming Haskell or Ghc. The first few times you realise the compiler isn't a magic wand that stops you being silly are the hardest. Jamie Love wrote: Oh, I see I wasn't thinking through the code (and I'm still in the honeymoon

Re: [Haskell-cafe] Crash in Data.ByteString.Lazy.hPut

I should point out that this is on GHC 6.8.2 compiled from source on a Mac powerpc. Jamie Love wrote: Hi there, Not sure where to raise bugs in hackage libraries, so I'm posting here. If there is a better place, please let me know. The following code crashes with a divide by zero error

[Haskell-cafe] Binary IO of a list of ints

was to do something like: foldr (\x B.hPut output (runPut $ do put (x :: Word8))) data (where output is my file handle), but apart from giving me type errors, it seems a rather arduous way to do it. Could anyone suggest a better way to do this? -- Jamie Love Senior Consultant Aviarc

Re: [Haskell-cafe] Re: Binary IO of a list of ints

Stephan Walter wrote: Hi, On 2008-01-24 12:14, Jamie Love wrote: I have a list of ints, with values between 0 and 255 and I need to print them out in little endian form to a file. How about just using Data.Char.chr ? Essentially because I need to control the byte ordering

Re: [Haskell-cafe] Binary IO of a list of ints

. Jed -- Jamie Love Senior Consultant Aviarc Australia Mobile: +61 400 548 048 This message has been scanned for viruses and dangerous content by MailScanner and is believed to be clean

Re: [Haskell-cafe] Basic binary IO

:: Int32) put (14 :: Int32) Yields the lazy bytestring, BM\NUL\NUL\NUL\NUL\NUL\NUL\NUL\NUL\NUL\NUL\NUL\SO -- Jamie Love Senior Consultant Aviarc Australia Mobile: +61 400 548 048 This message has been scanned

[Haskell-cafe] Basic binary IO

) to 4 Char8 elements 2/ rotate bits/bytes in a 32 bit Char32 (or Int32) so they are explicitly little-endian (I work on a mac powerbook, and it is big-endian) 3/ convert an Integer or Int type to an Int32 type Any pointers or suggestions would be helpful. Thanks -- Jamie Love Senior Consultant