Re: [Haskell-cafe] Iteratees again
dm-list-haskell-c...@scs.stanford.edu writes: leaking file descriptors ...until they are garbage collected. I tend to consider the OS fd limitation an OS design error - I've no idea why there should be some arbitrary limit on open files, as long as there is plenty of memory around to store them. But, well, yes, it is a real concern. parsers that parse every possible input and never fail. I guess I need to look into how iteratees handle parse failure. Generally, for me a parse failure means program failure - either the data is corrupt, or the program is incorrect. Thus, for anything other than a toy program, your code actually has to be: readFoo path = bracket (hOpen path) hclose $ hGetContents = (\s - return $! decodeFoo s) No, I can't do that in general, because I want to process a Foo (which typically is or contains a list of records) incrementally. I can't assume the file or its data are smalle enough to fit in memory. It is important that readFoo returns a structure that can be consumed lazily - or perhaps it can be iteratee all the way up. Which is still not guaranteed to work if Foo contains thunks, so then you end up having to write: readFoo path = bracket (hOpen path) hclose $ \h - do s - hGetContents h let foo = decodeFoo s deepseq foo $ return foo I think this - or rather, having Foo's records be strict - is a good idea anyway. The previous discussion about frequency counts seems to indicate that this goes equally well for iteratees. Thanks for the elaborate answer. -k -- If I haven't seen further, it is by standing in the footprints of giants ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] *GROUP HUG*
Michael Litchard mich...@schmong.org writes: I disagree. I'm by no means proficient in Haskell. And, I never bothered learning PHP. I will when I need to. PHP programmers are a dime a dozen. ..and since PHP programmers are a dime a dozen, any decent manager (who, after all, has an MBA and knows that employees¹ are expendable and interchangeable means of production) will select PHP as the technology for her next project. Gresham's law states roughly that bad money drives out good. I thus propose a corollary: bad languages drive out good. It's been my experience that Haskell is a tool one may use to distinguish oneself from the hoi-poloi. This is important when you live in an area where the baker down the street has a CS degree. Are you saying CS degrees are a dime a baker's dozen? -k ¹) With the sole exception of managers, of course. -- If I haven't seen further, it is by standing in the footprints of giants ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Comment Syntax
-- followed by a symbol does not start a comment, thus for example, haddock declarations must begin with -- |, and not --|. What might --| mean, if not a comment? It doesn't seem possible to define it as an operator. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Comment Syntax
On Fri, Jun 3, 2011 at 10:32, Guy guytsalmave...@yahoo.com wrote: -- followed by a symbol does not start a comment, thus for example, haddock declarations must begin with -- |, and not --|. What might --| mean, if not a comment? It doesn't seem possible to define it as an operator. GHCi, at least, allows it. Prelude let (--|) = (+) Prelude 1 --| 2 3 --Max ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Comment Syntax
On 3 June 2011 18:32, Guy guytsalmave...@yahoo.com wrote: -- followed by a symbol does not start a comment, thus for example, haddock declarations must begin with -- |, and not --|. What might --| mean, if not a comment? It doesn't seem possible to define it as an operator. Sure you can; --| is a valid operator. -- Ivan Lazar Miljenovic ivan.miljeno...@gmail.com IvanMiljenovic.wordpress.com ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Comment Syntax
-- followed by a symbol does not start a comment, thus for example, haddock declarations must begin with -- |, and not --|. What might --| mean, if not a comment? It doesn't seem possible to define it as an operator. GHCi, at least, allows it. Prelude let (--|) = (+) Prelude 1 --| 2 3 I believe the motivating example that persuaded the Language Committee to allow these symbols was -- which is not of course used anywhere in the standard libraries, but is an extremely nice symbol to have available in user code. Regards, Malcolm ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Comment Syntax
On 03/06/2011 12:01, Malcolm Wallace wrote: I believe the motivating example that persuaded the Language Committee to allow these symbols was -- which is not of course used anywhere in the standard libraries, but is an extremely nice symbol to have available in user code. Seeing as no library actually defines such a symbol, is it worth forcing an extra space into comments? --| and --^ would be an extremely nice symbols for haddock comments. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Comment Syntax
On 3 June 2011 19:19, Guy guytsalmave...@yahoo.com wrote:
On 03/06/2011 12:01, Malcolm Wallace wrote:
I believe the motivating example that persuaded the Language Committee to
allow these symbols was
--
which is not of course used anywhere in the standard libraries, but is an
extremely nice symbol to have available in user code.
Seeing as no library actually defines such a symbol, is it worth forcing an
extra space into comments? --| and --^ would be an extremely nice symbols
for haddock comments.
We already have to forms of comments: -- and {- -}; why do we need another two?
Think of it this way: the -- defines the comment, and then we use
the | or ^ to indicate to _haddock_ to interpret this differently.
I don't think we need to special-case symbols starting with -- just
to avoid having to put a space in to delimit the comment indicator and
the markup indicator.
That said, I have a use for -- as a symbol... if it wasn't that I'd
also want something like -- to follow suit, and as such it'll just be
easier to use something like .-. and .--. (for creating directed and
undirected edges respectively in graphs).
--
Ivan Lazar Miljenovic
ivan.miljeno...@gmail.com
IvanMiljenovic.wordpress.com
___
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Comment Syntax
On 03/06/2011 12:26, Ivan Lazar Miljenovic wrote:
On 3 June 2011 19:19, Guyguytsalmave...@yahoo.com wrote:
On 03/06/2011 12:01, Malcolm Wallace wrote:
I believe the motivating example that persuaded the Language Committee to
allow these symbols was
--
which is not of course used anywhere in the standard libraries, but is an
extremely nice symbol to have available in user code.
Seeing as no library actually defines such a symbol, is it worth forcing an
extra space into comments? --| and --^ would be an extremely nice symbols
for haddock comments.
We already have to forms of comments: -- and {- -}; why do we need another two?
Think of it this way: the -- defines the comment, and then we use
the | or ^ to indicate to _haddock_ to interpret this differently.
I don't think we need to special-case symbols starting with -- just
to avoid having to put a space in to delimit the comment indicator and
the markup indicator.
I wasn't proposing additional comment symbols; I'm proposing that anything
beginning with -- is a comment.
___
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Attoparsec concatenating combinator
Bryan O'Sullivan wrote: I'd like a no-copy combinator for the same reasons, but I think it's impossible to do without some low-level support. I wrote: ...does the internal representation easily admit such a combinator? Not very easily. Internally, attoparsec maintains just three pieces of data for its state... If there was a bytes consumed counter, it would be possible to write a try-like combinator I was thinking of even lower level: allocating a moderate chunk of memory and writing the results directly into it consecutively as a special case. I think Data.ByteString.Internal.create might do the trick. In fact, some of the existing basic attoparsec combinators, like takeWhile, could use that kind of treatment. The question is whether you want to dip that low into the ByteString implementation. Part of the problem is that there doesn't seem to be any way to allocate contiguous memory in GHC and then release only part of it. So even ByteString itself is doing extra copying. That is another reason why I think there may be some serious performance gains to be had by exposing those internals in attoparsec. [Duncan: Did you notice that the Haddocks for Data.ByteString.Internals and a few others haven't been building lately?] Thanks, Yitz ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Comment Syntax
2011/6/3 Guy guytsalmave...@yahoo.com: I wasn't proposing additional comment symbols; I'm proposing that anything beginning with -- is a comment. I use -- as a infix operator to describe types in Template Haskell. So I too oppose your proposal. ;) ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Attoparsec concatenating combinator
Mario Blažević wrote: I don't know if this helps, but the incremental-parser library has exactly the combinator you're looking for. Wow, that is a beautiful implementation of a general parser library. So much simpler than Parsec. Thanks for pointing it out. Why are you hiding those nice Monoid classes in the parser package? Shouldn't it be a separate package? Edward Kmett has also been adding some nice Monoid abstractions lately. I haven't been following all of it. I wonder how yours and his relate. Thanks, Yitz ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] License of hslogger, HDBC, etc.
John Goerzen wrote: I've decided that I'm OK with re-licensing hslogger, HDBC, and well all of my Haskell libraries (not end programs) under 3-clause BSD. Thanks John! -Yitz ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Comment Syntax
On Fri, 03 Jun 2011 12:19:31 +0300, Guy guytsalmave...@yahoo.com wrote: On 03/06/2011 12:01, Malcolm Wallace wrote: I believe the motivating example that persuaded the Language Committee to allow these symbols was -- which is not of course used anywhere in the standard libraries, but is an extremely nice symbol to have available in user code. Seeing as no library actually defines such a symbol, is it worth forcing an extra space into comments? [..] That's not true, xmonad[0] for example defines a ---operator; and I would find making exceptions for --| and --^ very inconsistent and annoying. [0] http://xmonad.org/xmonad-docs/xmonad/XMonad-ManageHook.html#v%3A--%3E pgp8FyrB33uh7.pgp Description: PGP signature ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Comment Syntax
On 3 June 2011 20:32, Daniel Schoepe daniel.scho...@googlemail.com wrote: On Fri, 03 Jun 2011 12:19:31 +0300, Guy guytsalmave...@yahoo.com wrote: On 03/06/2011 12:01, Malcolm Wallace wrote: I believe the motivating example that persuaded the Language Committee to allow these symbols was -- which is not of course used anywhere in the standard libraries, but is an extremely nice symbol to have available in user code. Seeing as no library actually defines such a symbol, is it worth forcing an extra space into comments? [..] That's not true, xmonad[0] for example defines a ---operator; and I would find making exceptions for --| and --^ very inconsistent and annoying. [0] http://xmonad.org/xmonad-docs/xmonad/XMonad-ManageHook.html#v%3A--%3E I _knew_ I had seen -- somewhere... *glares at Hayoo for not returning said results*. -- Ivan Lazar Miljenovic ivan.miljeno...@gmail.com IvanMiljenovic.wordpress.com ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Comment Syntax
Am 03.06.2011 10:32, schrieb Guy: What might --| mean, if not a comment? It doesn't seem possible to define it as an operator. Obviously, anyone who is going to write a formal logic framework would want to define the following operators ;) : T |- phi: T proves phi T |-- phi: T proves phi directly (by application of a single rule) phi -| T: phi is proven by T phi --| T: phi is proven by T directly ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Matplotlib analog for Haskell?
Hello, Please advise on Haskell 2D plotting libraries to generate plots, histograms, power spectra, bar charts, errorcharts, scatterplots, etc, similar to what Matplotlib does: http://matplotlib.sourceforge.net/ Thanks! Dmitri ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Matplotlib analog for Haskell?
On 3 June 2011 21:39, Dmitri O.Kondratiev doko...@gmail.com wrote: Hello, Please advise on Haskell 2D plotting libraries to generate plots, histograms, power spectra, bar charts, errorcharts, scatterplots, etc, similar to what Matplotlib does: http://matplotlib.sourceforge.net/ I was going to list the possible packages but found too many... so search for chart and plot on Hackage: http://hackage.haskell.org/package/ In particular, the Chart, plot and gnuplot libraries probably do what you want (or at least a subset). -- Ivan Lazar Miljenovic ivan.miljeno...@gmail.com IvanMiljenovic.wordpress.com ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Unbelievable parallel speedup
While I would guess that your superlinear speedup is due to the large variance of your single-core case, it is indeed possible to have superlinear speedup. Say you have a problem set of size 32MB and an L2 cache of 8MB per core. If you run the same program on one CPU it won't fit into the cache, so you'll have lots of cache misses and this will show in overall performance. If you run the same problem on 4 cores and manage to evenly distribute the working set, then it will fit into the local caches and you will have very few cache misses. Because caches are an order of magnitude faster than main memory, the parallel program can be more than 4x faster. To counteract this effect, you can try to scale the problem with the number of cores (but it then has to be a truly linear problem). That said, the variance in your single-CPU case is difficult to diagnose without knowing more about your program. It could be due to GC effects, it cold be interaction with the OS scheduler, it could be many other things. On many operating systems, if you run a single core program for a while, the OS scheduler may decide to move it to a different core in order to spread out wear among the cores. It's possible that something like this is happening and, unfortunately, some Linux system hide this from the user. Still there could be many other explanations. On 3 June 2011 13:10, John D. Ramsdell ramsde...@gmail.com wrote: I've enjoyed reading Simon Marlow's new tutorial on parallel and concurrent programming, and learned some surprisingly basic tricks. I didn't know about the '-s' runtime option for printing statistics. I decided to compute speedups for a program I wrote just as Simon did, after running the program on an unloaded machine with four processors. When I did, I found the speedup on two processors was 2.4, on three it was 3.2, and on four it was 4.4! Am I living in a dream world? I ran the test nine more times, and here is a table of the speedups. 2.35975 3.42595 4.39351 1.57458 2.18623 2.94045 1.83232 2.77858 3.41629 1.58011 2.37084 2.94913 2.36678 3.63694 4.42066 1.58199 2.29053 2.95165 1.57656 2.34844 2.94683 1.58143 2.3242 2.95098 2.36703 3.36802 4.41918 1.58341 2.30123 2.93933 That last line looks pretty reasonable to me, and is what I expected. Let's look at a table of the elapse times. 415.67 176.15 121.33 94.61 277.52 176.25 126.94 94.38 321.37 175.39 115.66 94.07 277.72 175.76 117.14 94.17 415.63 175.61 114.28 94.02 277.75 175.57 121.26 94.10 277.68 176.13 118.24 94.23 277.51 175.48 119.40 94.04 415.58 175.57 123.39 94.04 277.62 175.33 120.64 94.45 Notice that the elapse times for two and four processors is pretty consistent, and the one for three processors is a little inconsistent, but the times for the single processor case are all over the map. Can anyone explain all this variance? I have enclosed the raw output from the runs and the script that was run ten times to produce the output. John ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe -- Push the envelope. Watch it bend. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] License of hslogger, HDBC, etc.
Nothing particularly lofty; just a realization that other people didn't really want to engage in the conversation about LGPL, and I ran out of time to do so myself. -- John On 06/02/2011 05:07 PM, Vo Minh Thu wrote: 2011/6/2 John Goerzenjgoer...@complete.org: Hi Jon all, I've decided that I'm OK with re-licensing hslogger, HDBC, and well all of my Haskell libraries (not end programs) under 3-clause BSD. My schedule is extremely tight right now but if someone wants to send me patches for these things I will try to apply them within the week. Thanks! What was your line of reasoning to make the switch? Cheers, Thu ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Attoparsec concatenating combinator
On 11-06-03 06:00 AM, Yitzchak Gale wrote: Mario Blažević wrote: I don't know if this helps, but the incremental-parser library has exactly the combinator you're looking for. Wow, that is a beautiful implementation of a general parser library. So much simpler than Parsec. Thanks for pointing it out. Thanks. I guess I should get to work fixing its deficiencies then. Why are you hiding those nice Monoid classes in the parser package? Shouldn't it be a separate package? I considered it, and I'll do it if there's interest, but for the first release I decided to keep them close to where they're needed. There was less work that way. I'd hate to release a standalone package with only half the instance implementations. Edward Kmett has also been adding some nice Monoid abstractions lately. I haven't been following all of it. I wonder how yours and his relate. If you mean semigroups, they are related but only through Monoid. Semigroup is a superclass of Monoid, whereas CancellativeMonoid and FunctorialMonoid are its subclasses. CancellativeMonoid is lying between a Monoid and Group in power. It would make more sense to merge my classes into some group package, though I don't see any obvious candidate on Hackage right now. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Unbelievable parallel speedup
I've enjoyed reading Simon Marlow's new tutorial on parallel and concurrent programming I am interested: where I this tutorial? 2011/6/3 John D. Ramsdell ramsde...@gmail.com I've enjoyed reading Simon Marlow's new tutorial on parallel and concurrent programming, and learned some surprisingly basic tricks. I didn't know about the '-s' runtime option for printing statistics. I decided to compute speedups for a program I wrote just as Simon did, after running the program on an unloaded machine with four processors. When I did, I found the speedup on two processors was 2.4, on three it was 3.2, and on four it was 4.4! Am I living in a dream world? I ran the test nine more times, and here is a table of the speedups. 2.35975 3.42595 4.39351 1.57458 2.18623 2.94045 1.83232 2.77858 3.41629 1.58011 2.37084 2.94913 2.36678 3.63694 4.42066 1.58199 2.29053 2.95165 1.57656 2.34844 2.94683 1.58143 2.3242 2.95098 2.36703 3.36802 4.41918 1.58341 2.30123 2.93933 That last line looks pretty reasonable to me, and is what I expected. Let's look at a table of the elapse times. 415.67 176.15 121.33 94.61 277.52 176.25 126.94 94.38 321.37 175.39 115.66 94.07 277.72 175.76 117.14 94.17 415.63 175.61 114.28 94.02 277.75 175.57 121.26 94.10 277.68 176.13 118.24 94.23 277.51 175.48 119.40 94.04 415.58 175.57 123.39 94.04 277.62 175.33 120.64 94.45 Notice that the elapse times for two and four processors is pretty consistent, and the one for three processors is a little inconsistent, but the times for the single processor case are all over the map. Can anyone explain all this variance? I have enclosed the raw output from the runs and the script that was run ten times to produce the output. John ___ 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] Unbelievable parallel speedup
On 3 June 2011 16:14, Yves Parès limestr...@gmail.com wrote: I am interested: where I this tutorial? https://github.com/simonmar/par-tutorial -- Erlend Hamberg ehamb...@gmail.com ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Attoparsec concatenating combinator
On Fri, Jun 3, 2011 at 11:52 AM, Yitzchak Gale g...@sefer.org wrote: Bryan O'Sullivan wrote: I'd like a no-copy combinator for the same reasons, but I think it's impossible to do without some low-level support. I wrote: ...does the internal representation easily admit such a combinator? Not very easily. Internally, attoparsec maintains just three pieces of data for its state... If there was a bytes consumed counter, it would be possible to write a try-like combinator I was thinking of even lower level: allocating a moderate chunk of memory and writing the results directly into it consecutively as a special case. The blaze-builder might work for this also, this is exactly the problem it's designed for. G -- Gregory Collins g...@gregorycollins.net ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Matplotlib analog for Haskell?
On Fri, Jun 3, 2011 at 3:44 PM, Ivan Lazar Miljenovic ivan.miljeno...@gmail.com wrote: On 3 June 2011 21:39, Dmitri O.Kondratiev doko...@gmail.com wrote: Hello, Please advise on Haskell 2D plotting libraries to generate plots, histograms, power spectra, bar charts, errorcharts, scatterplots, etc, similar to what Matplotlib does: http://matplotlib.sourceforge.net/ I was going to list the possible packages but found too many... so search for chart and plot on Hackage: http://hackage.haskell.org/package/ In particular, the Chart, plot and gnuplot libraries probably do what you want (or at least a subset). -- Thanks! I tried gnuplot: GHCi, version 7.0.3: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Loading package ffi-1.0 ... linking ... done. Prelude import Graphics.Gnuplot.Simple Prelude Graphics.Gnuplot.Simple :l Demo.hs Demo.hs:25:18: Could not find module `Paths_gnuplot': Use -v to see a list of the files searched for. Failed, modules loaded: none. Prelude Graphics.Gnuplot.Simple Where to get `Paths_gnuplot': module? ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Matplotlib analog for Haskell?
On Fri, Jun 3, 2011 at 9:57 AM, Dmitri O.Kondratiev doko...@gmail.com wrote: On Fri, Jun 3, 2011 at 3:44 PM, Ivan Lazar Miljenovic ivan.miljeno...@gmail.com wrote: On 3 June 2011 21:39, Dmitri O.Kondratiev doko...@gmail.com wrote: Hello, Please advise on Haskell 2D plotting libraries to generate plots, histograms, power spectra, bar charts, errorcharts, scatterplots, etc, similar to what Matplotlib does: http://matplotlib.sourceforge.net/ I was going to list the possible packages but found too many... so search for chart and plot on Hackage: http://hackage.haskell.org/package/ In particular, the Chart, plot and gnuplot libraries probably do what you want (or at least a subset). -- Thanks! I tried gnuplot: GHCi, version 7.0.3: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Loading package ffi-1.0 ... linking ... done. Prelude import Graphics.Gnuplot.Simple Prelude Graphics.Gnuplot.Simple :l Demo.hs Demo.hs:25:18: Could not find module `Paths_gnuplot': Use -v to see a list of the files searched for. Failed, modules loaded: none. Prelude Graphics.Gnuplot.Simple Where to get `Paths_gnuplot': module? Have you installed the gnuplot package? What command did you use to start GHCi? Thanks, Antoine ___ 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] [JOB] NYU's Center for Genomics and Systems Biology seeks Functional Programmer
Relevance to this list: The posting below is for an OCaml programmer but welcomes applications from Haskell programmers. Dear Functional Programmers, I am pleased to announce a job opportunity at The Center for Genomics and Systems Biology (CGSB) at New York University (NYU), located in the heart of Manhattan. The position's main function will be to develop software in the OCaml language to manage, analyze, and display the vast amounts of data generated by next-generation sequencing technologies. NYU's strong commitment to this field is represented by its $100M investment in the brand new CGSB building, which houses the latest sequencing platforms and excellent high performance computing facilities. The position will support the computational needs of several experimental labs by designing and building: o A database for tracking samples, very large quantities of raw data, and complex analysis results o A website for users to submit new samples, monitor progress of their workflow, and visualize data o A system for distributing batch jobs to a cluster, accounting for dependencies between jobs and cached results All components are expected to follow good functional programming design. There are no formal experience or education requirements. Although the software will be written in OCaml, we welcome applicants with experience in other functional languages, especially Haskell, F#, and SML. There is flexibility in the exact nature of the position; you may expand your work to machine learning, parallel programming, or any of the many topics relevant to bioinformatics, so long as the core requirements of the position are fulfilled. Experience in the following areas is a plus but not required: bioinformatics, statistics, type theory, distributed computing, and UNIX systems administration. NYU researchers are using sequencing technologies to investigate basic questions about the nature of life and to address fundamental problems in human health. The very large datasets generated by these technologies pose significant computational challenges for which the robust principles of functional programming are ideally suited. I hope you will find this an exciting opportunity. If you are interested, please contact me with a CV and brief description of your background. Thank you. __ Ashish Agarwal New York University http://ashishagarwal.org ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Matplotlib analog for Haskell?
I tried gnuplot: Demo.hs:25:18: Could not find module `Paths_gnuplot': Use -v to see a list of the files searched for. Failed, modules loaded: none. Prelude Graphics.Gnuplot.Simple Where to get `Paths_gnuplot': module? $ cd gnuplot-0.4.2 $ cabal install # this generates the Paths_gnuplot module $ ghci ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Comment Syntax
On Fri, Jun 3, 2011 at 05:19, Guy guytsalmave...@yahoo.com wrote: On 03/06/2011 12:01, Malcolm Wallace wrote: I believe the motivating example that persuaded the Language Committee to allow these symbols was -- which is not of course used anywhere in the standard libraries, but is an extremely nice symbol to have available in user code. Seeing as no library actually defines such a symbol, is it worth forcing an extra space into comments? --| and --^ would be an extremely nice symbols for haddock comments. http://xmonad.org/xmonad-docs/xmonad/XMonad-ManageHook.html#v%3A--%3E ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Comment Syntax
I propose that only {- -} is comment; that is, -- is an operator token
and not a marker of comments.
Two birds in one stone:
1. Removes the cause of the mistake of writing a haddock comment as --|
That is, if no one writes any comment with -- then no one writes any
haddock comment with --| --^ etc.
2. Opens up the option of using -- for prefix unary negation, so that -
is unambiguously infix subtraction and therefore (- x) is consistently
right sectioning of infix subtraction.
___
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Iteratees again
On Fri, Jun 3, 2011 at 03:53, Ketil Malde ke...@malde.org wrote: dm-list-haskell-c...@scs.stanford.edu writes: leaking file descriptors ...until they are garbage collected. I tend to consider the OS fd limitation an OS design error - I've no idea why there should be some arbitrary limit on open files, as long as there is plenty of memory around to store them. But, well, yes, it is a real concern. In the case of Unix, available memory was indeed the motivating factor. The DEC minicomputers it was developed on didn't have a whole lot of memory, plus older Unix reallocated the per-process file structures as part of the (struct proc) for speed (again, old slow systems). The modern reason for limits is mostly to avoid runaway processes. Usually the hard limit is set pretty high but the soft limit is lower. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Attoparsec concatenating combinator
On Fri, Jun 3, 2011 at 2:52 AM, Yitzchak Gale g...@sefer.org wrote: I was thinking of even lower level: allocating a moderate chunk of memory and writing the results directly into it consecutively as a special case. Surely that would save only one copy compared to creating a list of results and then concatenating them, no? I'd be a little surprised if it proved worthwhile. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Comment Syntax
On 03/06/2011 05:02 PM, Albert Y. C. Lai wrote:
I propose that only {- -} is comment; that is, -- is an operator token
and not a marker of comments.
I'm curious to know why anybody thought that -- was a good comment
marker in the first place. (I'm curious because Haskell isn't the only
language to have made this strange choice.)
I once tried defining a ++ operator and then when I went to define a
matching -- operator...
___
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] haskellwiki slow/unresponsive
I have been trying to make a few edits to the haskell wiki and find it an excruciating process when I press save and then have to wait a long time to see if the save will go through. I just clicked on the introduction page and it may have took an entire minute to load. Can we put at the top: this wiki written in php, not haskell! Seriously though, the wiki has performed poorly for a long time now. It gives a bad impression to newcomers and deters contributions. Can I (and others!) donate money so someone can make the wiki responsive? Thanks, Greg Weber ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] How to install GhC on a Mac without registering?
I rarely use a Mac because it is too cute, but I bought one for my wife. I'd like to install GHC on her Mac just to test Haskell Platform and cabal install. (I rarely use Windows too, but testing GHC cabal install is completely painless.) To do a quick test, do I really have to register as an Apple developer, or is there a way to test the platform anonymously? Someone who some times worries about privacy, John ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Comment Syntax
On 4 June 2011 02:02, Albert Y. C. Lai tre...@vex.net wrote:
I propose that only {- -} is comment; that is, -- is an operator token and
not a marker of comments.
Two birds in one stone:
1. Removes the cause of the mistake of writing a haddock comment as --|
That is, if no one writes any comment with -- then no one writes any haddock
comment with --| --^ etc.
2. Opens up the option of using -- for prefix unary negation, so that - is
unambiguously infix subtraction and therefore (- x) is consistently right
sectioning of infix subtraction.
I think it's probably too late to make such a sweeping change;
besides, having some kind of inline comment indicator (which goes to
the end of line) is useful.
--
Ivan Lazar Miljenovic
ivan.miljeno...@gmail.com
IvanMiljenovic.wordpress.com
___
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] haskellwiki slow/unresponsive
This is a bit of a tangent, but has anyone developed wiki software in Haskell? If anyone is working on this or interested in working on it, I'd like to help. I've built simple wiki applications with Python web frameworks and have been looking for a good project to start learning one of the Haskell web application frameworks. Eventually it'd be nice to proudly advertise all the prominent Haskell community pages as being powered by Haskell. Thanks! Eric On Fri, Jun 3, 2011 at 12:50 PM, Greg Weber g...@gregweber.info wrote: I have been trying to make a few edits to the haskell wiki and find it an excruciating process when I press save and then have to wait a long time to see if the save will go through. I just clicked on the introduction page and it may have took an entire minute to load. Can we put at the top: this wiki written in php, not haskell! Seriously though, the wiki has performed poorly for a long time now. It gives a bad impression to newcomers and deters contributions. Can I (and others!) donate money so someone can make the wiki responsive? Thanks, Greg Weber ___ 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] haskellwiki slow/unresponsive
On 3 June 2011 22:17, Eric Rasmussen ericrasmus...@gmail.com wrote: This is a bit of a tangent, but has anyone developed wiki software in Haskell? They have[1][2], but there's always room for more. [1]: http://hackage.haskell.org/package/gitit [2]: http://hackage.haskell.org/package/Flippi ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] haskellwiki slow/unresponsive
On 4 June 2011 06:17, Eric Rasmussen ericrasmus...@gmail.com wrote: This is a bit of a tangent, but has anyone developed wiki software in Haskell? http://hackage.haskell.org/package/gitit -- Ivan Lazar Miljenovic ivan.miljeno...@gmail.com IvanMiljenovic.wordpress.com ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] How to install GhC on a Mac without registering?
Hi John, You should be able to install the Apple Developer Tools directly from one of the software installation DVDs that come with the Mac. If you're not downloading the tools from online, you shouldn't need to register. Best, -Judah On Fri, Jun 3, 2011 at 1:03 PM, John D. Ramsdell ramsde...@gmail.com wrote: I rarely use a Mac because it is too cute, but I bought one for my wife. I'd like to install GHC on her Mac just to test Haskell Platform and cabal install. (I rarely use Windows too, but testing GHC cabal install is completely painless.) To do a quick test, do I really have to register as an Apple developer, or is there a way to test the platform anonymously? Someone who some times worries about privacy, John ___ 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] How to install GhC on a Mac without registering?
I thought Apple had stopped bundling the dev tools with installation DVDs? On Fri, Jun 3, 2011 at 4:32 PM, Judah Jacobson judah.jacob...@gmail.comwrote: Hi John, You should be able to install the Apple Developer Tools directly from one of the software installation DVDs that come with the Mac. If you're not downloading the tools from online, you shouldn't need to register. Best, -Judah On Fri, Jun 3, 2011 at 1:03 PM, John D. Ramsdell ramsde...@gmail.com wrote: I rarely use a Mac because it is too cute, but I bought one for my wife. I'd like to install GHC on her Mac just to test Haskell Platform and cabal install. (I rarely use Windows too, but testing GHC cabal install is completely painless.) To do a quick test, do I really have to register as an Apple developer, or is there a way to test the platform anonymously? Someone who some times worries about privacy, John ___ 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
Re: [Haskell-cafe] Matplotlib analog for Haskell?
Malcolm Wallace schrieb: I tried gnuplot: Demo.hs:25:18: Could not find module `Paths_gnuplot': Use -v to see a list of the files searched for. Failed, modules loaded: none. Prelude Graphics.Gnuplot.Simple Where to get `Paths_gnuplot': module? $ cd gnuplot-0.4.2 $ cabal install # this generates the Paths_gnuplot module $ ghci Yes, you must install the package before loading Demo into GHCi, since the package contains a data file that the Demo wants to load. Currently I am trying to interface to gnuplot's histogram feature. You may also to subscribe to http://projects.haskell.org/cgi-bin/mailman/listinfo/gnuplot ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Matplotlib analog for Haskell?
On Sat, Jun 4, 2011 at 12:55 AM, Henning Thielemann schlepp...@henning-thielemann.de wrote: Malcolm Wallace schrieb: I tried gnuplot: Demo.hs:25:18: Could not find module `Paths_gnuplot': Use -v to see a list of the files searched for. Failed, modules loaded: none. Prelude Graphics.Gnuplot.Simple Where to get `Paths_gnuplot': module? $ cd gnuplot-0.4.2 $ cabal install # this generates the Paths_gnuplot module $ ghci Yes, you must install the package before loading Demo into GHCi, since the package contains a data file that the Demo wants to load. Currently I am trying to interface to gnuplot's histogram feature. You may also to subscribe to http://projects.haskell.org/cgi-bin/mailman/listinfo/gnuplot Thanks! So, if I got this right, I should run: 'cabal install -fbuildExamples gnuplot' from gnuplot source root folder? Yet first I need to build gnupolt for MacOSX and Win32 that I both use. Ok, I'll give it a try... ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] How to install GhC on a Mac without registering?
XCode 4 is for sale in the App Store for $5. You do need an account, but not a developer account... so it may be a bit more palatable. On Fri, Jun 3, 2011 at 1:03 PM, John D. Ramsdell ramsde...@gmail.comwrote: I rarely use a Mac because it is too cute, but I bought one for my wife. I'd like to install GHC on her Mac just to test Haskell Platform and cabal install. (I rarely use Windows too, but testing GHC cabal install is completely painless.) To do a quick test, do I really have to register as an Apple developer, or is there a way to test the platform anonymously? ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Matplotlib analog for Haskell?
On 4 June 2011 07:11, Dmitri O.Kondratiev doko...@gmail.com wrote: So, if I got this right, I should run: 'cabal install -fbuildExamples gnuplot' from gnuplot source root folder? You can either get the gnuplot tarball from Hackage, unpack it, and then within the directory do cabal install -fbuildExamples (assuming you want the examples). Or else you can just do cabal install -fbuildExamples gnuplot from anywhere and cabal-install will download it, unpack it, build it, install it and then remove the unpacked tarball. -- Ivan Lazar Miljenovic ivan.miljeno...@gmail.com IvanMiljenovic.wordpress.com ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] haskellwiki slow/unresponsive
On Fri, Jun 3, 2011 at 4:17 PM, Eric Rasmussen ericrasmus...@gmail.com wrote: This is a bit of a tangent, but has anyone developed wiki software in Haskell? Gitit is the most developed one, and it's been suggested in the past that hawiki move over. It's not a good idea for a couple reasons, which I've said before but I'll repeat here: 1. Performance; there have been major issues with the Darcs backend, though mostly resolved, and we don't know how well the Git backend would scale either. Gitit has mostly been used with single-users (how I use it) or projects with light traffic (wiki.darcs.net). I don't know why hawiki is slow, but whatever it is is probably either hardware or configuration related - MediaWiki after all powers one of the most popular websites in the world. 2. Security; there have been big holes in Gitit. Some of it is simple immaturity, some of it due to the DVCS backends. Where there is one hole, there are probably more - if there aren't holes in the Gitit code proper, there probably are some in Happstack. There's no reason to think there aren't: security is extremely hard. And in that respect, Mediawiki is simply much more battle-tested. (Most popular websites in the world, again, and one that particularly invites abuse and attack.) 3. The existing hawiki content is Mediawiki centric, relying on templates and MW syntax etc. Templates alone would have to be implemented somehow, and Pandoc's MW parser is, last I heard, pretty limited. Gitit is great for what it is, and I like using it - but it's not something I would rely on for anything vital, and especially not for something which might be attacked. (This isn't paranoia; I deal with spammers every day on hawiki, and c.h.o was rooted recently enough that the memory should still be fresh in our collective minds.) -- gwern http://www.gwern.net ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] haskellwiki slow/unresponsive
Those are definitely valid concerns. Has anyone made a wiki-like site with Yesod? I hadn't heard of Yesod until I joined this mailing list, but I've seen quite a bit of buzz around it since then. If a large enough chunk of the community is backing a framework and focusing on making it secure and reliable, then it should be possible to build applications with it (wikis, blogs, etc.) that draw on the framework's strength and security. You may still have security issues, but if they're continually addressed and maintained at the framework level it benefits everyone building applications on top of that framework. I'm still relatively new to the Haskell community so I apologize if much of this has been addressed before! On Fri, Jun 3, 2011 at 3:11 PM, Gwern Branwen gwe...@gmail.com wrote: On Fri, Jun 3, 2011 at 4:17 PM, Eric Rasmussen ericrasmus...@gmail.com wrote: This is a bit of a tangent, but has anyone developed wiki software in Haskell? Gitit is the most developed one, and it's been suggested in the past that hawiki move over. It's not a good idea for a couple reasons, which I've said before but I'll repeat here: 1. Performance; there have been major issues with the Darcs backend, though mostly resolved, and we don't know how well the Git backend would scale either. Gitit has mostly been used with single-users (how I use it) or projects with light traffic (wiki.darcs.net). I don't know why hawiki is slow, but whatever it is is probably either hardware or configuration related - MediaWiki after all powers one of the most popular websites in the world. 2. Security; there have been big holes in Gitit. Some of it is simple immaturity, some of it due to the DVCS backends. Where there is one hole, there are probably more - if there aren't holes in the Gitit code proper, there probably are some in Happstack. There's no reason to think there aren't: security is extremely hard. And in that respect, Mediawiki is simply much more battle-tested. (Most popular websites in the world, again, and one that particularly invites abuse and attack.) 3. The existing hawiki content is Mediawiki centric, relying on templates and MW syntax etc. Templates alone would have to be implemented somehow, and Pandoc's MW parser is, last I heard, pretty limited. Gitit is great for what it is, and I like using it - but it's not something I would rely on for anything vital, and especially not for something which might be attacked. (This isn't paranoia; I deal with spammers every day on hawiki, and c.h.o was rooted recently enough that the memory should still be fresh in our collective minds.) -- gwern http://www.gwern.net ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Problem with linker
Hi, I'm trying to use Hoogle as a library in my Summer of Code project. But when I try to compile using Cabal, I get the following error: Linking dist/build/scion-browser/scion-browser ... /home/serras/.cabal/lib/hoogle-4.2.4/ghc-7.0.2/libHShoogle-4.2.4.a(Serialise.o): In function `s1ePR_info': (.text+0x2015): undefined reference to `hooglezm4zi2zi4_Pathszuhoogle_version1_closure' /home/serras/.cabal/lib/hoogle-4.2.4/ghc-7.0.2/libHShoogle-4.2.4.a(Serialise.o): In function `s1f8a_info': (.text+0x338f): undefined reference to `__stginit_hooglezm4zi2zi4_Pathszuhoogle_' I've been looking for some information and it seems to be related with the fact that Hoogle first builds a library and then build an executable using the library, but all files get recompiled in that second pass. Is there any way to workaround this problem? ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Problem with linker
On Sat, Jun 04, 2011 at 01:17:03AM +0200, Alejandro Serrano Mena wrote: Hi, I'm trying to use Hoogle as a library in my Summer of Code project. But when I try to compile using Cabal, I get the following error: Linking dist/build/scion-browser/scion-browser ... /home/serras/.cabal/lib/hoogle-4.2.4/ghc-7.0.2/libHShoogle-4.2.4.a(Serialise.o): In function `s1ePR_info': (.text+0x2015): undefined reference to `hooglezm4zi2zi4_Pathszuhoogle_version1_closure' /home/serras/.cabal/lib/hoogle-4.2.4/ghc-7.0.2/libHShoogle-4.2.4.a(Serialise.o): In function `s1f8a_info': (.text+0x338f): undefined reference to `__stginit_hooglezm4zi2zi4_Pathszuhoogle_' I've been looking for some information and it seems to be related with the fact that Hoogle first builds a library and then build an executable using the library, but all files get recompiled in that second pass. Is there any way to workaround this problem? Does 'ghc-pkg check' report any problems? ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Problem with linker
On Fri, Jun 3, 2011 at 4:17 PM, Alejandro Serrano Mena trup...@gmail.com wrote: I've been looking for some information and it seems to be related with the fact that Hoogle first builds a library and then build an executable using the library, but all files get recompiled in that second pass. Is there any way to workaround this problem? Upgrading Cabal / cabal-install is a good place to start, if you're not already using the 0.10's. I also suggest using cabal-dev, since issues like this can be caused by combinations of dependencies that conflict. There's a good chance that you just have a weird mix of compiled libraries that don't all work together, and cabal isn't able/willing to rebuild everything necessary to make all the things in your user package db work together. I very recently installed Hoogle locally, on a fresh system, so I'm fairly confident it's still possible without too many headaches :). --Rogan ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] *GROUP HUG*
I just wanted to echo this a bit. I'm a Ruby on Rails developer in my day job. While I still enjoy ruby, I was very proud that my studies of Haskell helped me identify a problem a week or so ago that would be much more difficult to solve in an imperative language and benefits from laziness. While the role of this tool will be limited compared to what I do day by day, I can finally say that I'm using Haskell at work. If anyone is curious, the project is essentially a service that determines the optimum order for a comparison shopping engine. On Thu, Jun 2, 2011 at 11:52 AM, Yves Parès limestr...@gmail.com wrote: Learning Haskell will pay off much less than learning PHP, if your goal is to find a job. Amen. I cannot agree with this for practical reasons. I'm using Haskell for real world commercial applications, and I'm very productive with it. I wish so much I could say that... Out of curiosity, what are you using Haskell for? 2011/6/2 Ertugrul Soeylemez e...@ertes.de Alberto G. Corona agocor...@gmail.com wrote: Haskell is an academic asset as well as a fun asset. I cannot agree with this for practical reasons. I'm using Haskell for real world commercial applications, and I'm very productive with it. There is however a variation of this statement, with which I could agree, namely: Learning Haskell will pay off much less than learning PHP, if your goal is to find a job. It takes a lot longer and there are a lot less companies in need of Haskell programmers. Greets, Ertugrul -- nightmare = unsafePerformIO (getWrongWife = sex) http://ertes.de/ ___ 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 -- Michael Xavier http://www.michaelxavier.net ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] How to install GhC on a Mac without registering?
Quoth Daniel Peebles pumpkin...@gmail.com, I thought Apple had stopped bundling the dev tools with installation DVDs? Do you have an install DVD with no Xcode on it? I have it on a 10.6 DVD, when would this have happened (or stopped happening)? Quoth Nathan Howell nathan.d.how...@gmail.com, XCode 4 is for sale in the App Store for $5. You do need an account, but not a developer account... so it may be a bit more palatable. But you don't need Xcode 4, do you? The Xcode 3 that comes with the install DVD will work fine! The text on the GHC download page should provide abundant clues to the process and requirements. I think it makes sense to believe what the port maintainer says there, for starters anyway. Donn ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
