baffling manual sections

to similar stuff. The former page also has a curious discussion of standalone deriving with a `for` keyword: http://www.haskell.org/ghc/dist/current/docs/users_guide/type-extensions.html#stand-alone-deriving -- Jason Dusek ___ Glasgow-haskell-users

Re: [Haskell-cafe] Re: [Haskell] [ANN] Safe Lazy IO in Haskell

:: Ord b = Set a - (a - Set b) - Set b setBind m f = unions (map f $ toList m) but there is no way to use setBind for a definition of = You can use a continuation trick. Trick? -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org

Re: [Haskell-cafe] Question about IO, interact functions,

of the string come in order has everything to do with `getContents`, which is trustworthy. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell] [ANN] Safe Lazy IO in Haskell

incompatible with being a lazy monad, exactly? -- Jason Dusek ___ Haskell mailing list Haskell@haskell.org http://www.haskell.org/mailman/listinfo/haskell

[Haskell-cafe] Re: [Haskell] [ANN] Safe Lazy IO in Haskell

incompatible with being a lazy monad, exactly? -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] conflicting variable definitions in pattern

are equal. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] forall vs =

a. () = a - a You can read `=` as entails. Then `() =` is the universe entails... and `(Monad m) =` is the universe with `m` in `Monad` entails... -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo

Re: [Haskell-cafe] Classes: functional dependency (type - value)

!). Please amend the code so it is easier to read and test. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] Array Binary IO molecular simulation

I believe Data.Binary includes a header with the data it serializes. In consequence, the second and all following arrays will be invisible. Sorry I can not be of more help. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org

Re: [Haskell-cafe] Array Binary IO molecular simulation

2009/05/02 Krzysztof Skrzętnicki gte...@gmail.com: 2009/05/02 Jason Dusek jason.du...@gmail.com: I believe Data.Binary includes a header with the data it serializes. In consequence, the second and all following arrays will be invisible. I didn't check the Binary instance for arrays, however

Re: [Haskell-cafe] Array Binary IO molecular simulation

2009/05/02 Grigory Sarnitskiy sargrig...@ya.ru: 2009/05/02 Jason Dusek : The original poster should try serializing a tuple of arrays instead of serializing each array individually. Maybe, but I have some doubts. I have to operate with thousands of arrays --- are tuples good in such case

Re: [Haskell-cafe] The Haskell Reddit is 1 year old

Happy Birthday! -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] unsafeSTToIO and stToIO

I gather that ...making it possible to use ST code directly on IORef's. is what we have today? -- Jason Dusek |...making it possible to use ST code directly on IORef's.| http://www.mail-archive.com/glasgow-haskell-b...@haskell.org/msg03568.html

Re: [Haskell-cafe] Converting IO [XmlTree] to [XmlTree]

the way in which the program fails (if it does) but it does not change the result. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] Haskell/JS -- better through typeclasses?

, statically, whether potentially infinite structures like lists are finite or infinite. I'm not sure about this but I suspect that's a major stumbling block. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http

Re: [Haskell-cafe] Haskell/JS -- better through typeclasses?

2009/04/26 John A. De Goes j...@n-brain.net: 2009/04/26 Jason Dusek:  This was what I was originally writing in about, yeah.  However, thinking it over I realize there are some serious  problems. We really do want to work with a restricted subset  of Haskell that is more amenable to translation

Re: [Haskell-cafe] Haskell/JS -- better through typeclasses?

beginning to appreciate that the core translation I imagined is perhaps not the most direct route. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: Is 78 characters still a good option? Was: [Haskell-cafe] breaking too long lines

not preserve the old ways, it'll be anarchy all the way down. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: Is 78 characters still a good option? Was: [Haskell-cafe] breaking too long lines

2009/04/26 Miguel miguelim...@yandex.ru: 2009/04/26 Jason Dusek jason.du...@gmail.com:  If we do not preserve the old ways, it'll be anarchy all the  way down. How exactly are you going to preserve old ways? Whenever are we are presented with the a question of correct conduct, we must re

[Haskell-cafe] Haskell/JS -- better through typeclasses?

may turn out not to be the best idea; maybe it is better to have a type class for types (for example, `Parser Char`) to provide their own translators? The it would be straightforward to prevent translation of programs that use concurrency libs, native ops or `IO`. -- Jason Dusek

Re: Is 78 characters still a good option? Was: [Haskell-cafe] breaking too long lines

There will always be some people who prefer longer lines. The real issue is, how do we deal with the fundamental disagreement here? It's not like we can have both. Also those people who like long lines -- will they all agree to a long line length? -- Jason Dusek

Re: [Haskell-cafe] Haskell/JS -- better through typeclasses?

2009/04/25 Brandon S. Allbery KF8NH allb...@ece.cmu.edu: 2009/04/25 Jason Dusek:  I'd like to be able to translate Haskell to JavaScript. http://haskell.org/haskellwiki/Yhc/Javascript ? Dead.  Many Haskell/JS bridges provide libraries for writing complete JavaScript programs in Haskell

Re: [Haskell-cafe] Haskell/JS -- better through typeclasses?

2009/04/25 Miguel Mitrofanov miguelim...@yandex.ru: 2009/04/25 Jason Dusek wrote: Many Haskell/JS bridges provide libraries for writing complete JavaScript programs in Haskell; some of them even include jQuery. However, my goals are more limited -- I'd like to be able to take a Haskell module

Re: [Haskell-cafe] Haskell/JS -- better through typeclasses?

, though -- like parsers. Actually, parsers are really all I care about at present. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] Haskell/JS -- better through typeclasses?

Interesting, thank you. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: Is 78 characters still a good option? Was: [Haskell-cafe] breaking too long lines

2009/04/25 Thomas Davie tom.da...@gmail.com: 2009/04/25 Jason Dusek:  There will always be some people who prefer longer lines. The  real issue is, how do we deal with the fundamental  disagreement here? It's not like we can have both. Also those  people who like long lines -- will they all agree

Re: [Haskell-cafe] Re: Is 78 characters still a good option? Was: breaking too long lines

2009/04/23 Maurí­cio briqueabra...@yahoo.com: Maybe we could learn with them: what about if Haskell Weekly News had a section on code review, like many newspapers have book review sections? This seems worthwhile. -- Jason Dusek ___ Haskell-Cafe

Re: writeFile/readFile on multiple threads leads to error

Is it too difficult to try this on Linux or Mac, just to see if it shows up there as well? -- Jason Dusek ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users

Re: Is 78 characters still a good option? Was: [Haskell-cafe] breaking too long lines

was chosen a long time ago. Let's accept it and move on. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: Is 78 characters still a good option? Was: [Haskell-cafe] breaking too long lines

to imprisonment. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] Being impure within a 'pure' function

If you want to do raw IO and repackage it as pure, you can use `unsafePerformIO` and friends. It is important to use the `NOINLINE` pragma in that case. -- Jason Dusek |...unsafePerformIO...| http://haskell.org/ghc/docs/latest/html/libraries/base/System-IO-Unsafe.html#v

Re: [Haskell-cafe] Re: ANNOUNCE: Utrecht Haskell Compiler (UHC) -- first release

better than the implementors what features should they implement. So what is the committee there for? To approve helpful suggestions? -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo

Re: [Haskell-cafe] Re: Is 78 characters still a good option? Was: breaking too long lines

2009/04/22 Achim Schneider bars...@web.de: Jason Dusek jason.du...@gmail.com wrote: Really, the whole thing makes me wish we had blasphemy laws. I'll definitely add it to the list of questions should I ever conduct a job interview. Just to test how much backing people have for their zeal

Re: Is 78 characters still a good option? Was: [Haskell-cafe] breaking too long lines

column convention sets a clear expectation for all of us; it's not a matter of what anyone likes. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] Parsec question

' [...] You get a type error because `string //` parses to a `String` while `eof` parses to a `()`. Instead you might use: parseText = manyTill anyChar (try (string // return ()) | eof) -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org

Re: [Haskell-cafe] Re: Looking for the fastest Haskell primes

2009/04/16 Achim Schneider bars...@web.de: {-# CAF foo #-} {-# NOCAF foo #-} Where do I find docs for these pragmas? -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] Data.ByteString woes

Could you pastebin something that demoes the error? -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] Lazy vs correct IO [Was: A round of golf]

of thing that you do on demand, too -- we have a file handle pool and as we run out of handles we switch to opening/closing. For a single really long read, opening/closing every 4k is just churn; if your doing thousands of long reads at once, though, it can't be helped. -- Jason Dusek

Re: [Haskell-cafe] Lazy vs correct IO [Was: A round of golf]

allow arbitrary interleaving. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] Lazy vs correct IO [Was: A round of golf]

incident. :; ulimit unlimited Turns out the `ulimit` on my Mac is pretty high. -- Jason Dusek |...tweak the OS...| http://www.kegel.com/c10k.html#limits.filehandles ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org

Re: [Haskell-cafe] Lazy vs correct IO [Was: A round of golf]

. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] Unique monad?

in stacking consumption. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] ANN: cmonad 0.1.1

2009/03/29 Lennart Augustsson lenn...@augustsson.net: ...GHC lacks certain optimizations to make efficient code when using CMonad, so instead of C speed you get low speed. Is this surprising to anyone? -- Jason Dusek ___ Haskell-Cafe mailing list

Re: [Haskell-cafe] Re: Use unsafePerformIO to catch Exception?

' is necessary.  Couldn't you always replace it with a case statement, with undefined on [] if necessary? How would that be any different from head? -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo

Really bad code for single method dictionaries?

-- code for single-method dictionaries -- unlifted_dummy [...] A cursory search on GHC's Trac shows no corresponding bug; is this no longer a problem? A small problem? I would like to know more about it. -- Jason Dusek |...stream fusion code...| http://www.cse.unsw.edu.au

Re: [Haskell-cafe] Ease of Haskell development on OS X?

. This has happened to me only once on one Mac in a year and a half of administering several Macs; but it's not something I've ever dealt with on other source-based systems. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http

Re: [Haskell-cafe] Employment

At my former employer, I wrote a couple of internal tools in Haskell that shipped to Linux, OS X and Windows. The relative ease of binary preparation was a selling point of Haskell. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe

Re: [Haskell-cafe] Re: Monads aren't evil

It is really too bad we can not define the operators _ ^_^ _ These are significant from an internationalization standpoint; and they'd make the language so much more competitive vis-a-vis LOLCode. -- Jason Dusek 2009/1/10 Brandon S. Allbery KF8NH allb...@ece.cmu.edu: On 2009

Re: [Haskell-cafe] Looking for Haskellers on Windows

of Windows developers be represented -- I was myself surprised to discover that the UUID package only worked on Linux -- it would be unconstructive to carry out such discussions offlist. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe

Re: [Haskell-cafe] understanding enumerator/iteratee

the Iteratee/Enumerator approach. The notion that we just fold over the (potentially side-effecting) data structure is probably misleading unless you already understand the design. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org

Re: [Haskell-cafe] Initializing GHC from Python

I upmodded this on Reddit. Thank you for your work. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] understanding enumerator/iteratee

Henning Thielemann schlepp...@henning-thielemann.de wrote: Jason Dusek schrieb: I'm taking a stab at composable streams, starting with cursors. I managed to make a derived cursor today -- as I work through this stuff, I hope to understand Iteratee/Enumerator better. How about a wiki

Re: [Haskell-cafe] understanding enumerator/iteratee

So an iteratee is not like a cursor because it does not own the collection -- it just tells us how to step it. The enumerator owns the collection and provides a way to scope resource use? -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe

Re: [Haskell-cafe] understanding enumerator/iteratee

I'm taking a stab at composable streams, starting with cursors. I managed to make a derived cursor today -- as I work through this stuff, I hope to understand Iteratee/Enumerator better. -- Jason Dusek http://github.com/jsnx/streams/tree/554dd69339f027f113a6cfa16f552727ba9d92b3/Control

Re: [Haskell-cafe] A hell of a question

of a Taoist practice with a long history -- and in fact, Chan was seen as a Taoist renewal. It is Chan that makes its way to Japan to become the Zen we all know. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org

Re: [Haskell-cafe] A hell of a question

-- that one comes to appreciate the Way and its Power. -- Jason Dusek ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] A hell of a question

Jonathan Cast jonathancc...@fastmail.fm wrote: Jason Dusek wrote: Thus it is in practical arts -- Chinese medicine, Taiji, strategy -- that one comes to appreciate the Way and its Power. But nonetheless, Haskell is not a practical art, no more than theoretical physics or abstract algebra

[Haskell-cafe] understanding enumerator/iteratee

So, it looks Iteratee takes a step on the resource -- whatever it is -- and Enumerator manages the resource and sequences the steps of the Iteratee. The Enumerator, then, defines our way of managing a particular resource -- how to take a step, how to close it, c. -- while the Iteratee

[Haskell-cafe] non-functions like unsafePerformIO are not technically part of the haskell language!

From an old thread: non-functions like unsafePerformIO are not technically part of the haskell language! How is this true, exactly? -- _jsn |...an old thread.| http://www.nabble.com/Re%3A-Re%3A-Parsers-are-monadic--p11390440.html ___

Re: [Haskell-cafe] type error

You can disable the monomorphism restriction in your .ghci so it needn't trouble your interactive sessions further. My .ghci follows my signature. -- _jsn :set -XOverlappingInstances :set -XNoMonomorphismRestriction :set -XUnicodeSyntax :set -XArrows :set -Wall :set

Re: [Haskell-cafe] Haskell project proposals reddit

It's a nice interface for collecting comments on an idea and collecting people's level of agreement -- it does those things very well. If I had a blog, I would turn off comments and put a link to reddit at the bottom and then scrape reddit for the comments :) -- _jsn

Re: [Haskell-cafe] Re: a haskell_proposals subreddit

This has happened to some of my proposals, too. The reddit is completely open. -- _jsn ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] Haskell project proposals reddit

I think you are overlooking the Web 2.0 aspect of this. -- _jsn ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

[Haskell-cafe] a haskell_proposals subreddit

There is a subreddit for people to propose libraries: http://www.reddit.com/r/haskell_proposals/ The idea being, that Web 2.0 will help us to allocate our collective talents more efficiently when it comes to extensions (and perhaps clue us in when our pet project is something

Re: [Haskell-cafe] Re: Dr Dobbs: Time to get good at functional programming

It's just there so you can show your boss it was in Dr. Dobbs, and so your boss can think Wow, I know what FP is -- thank you, Dr. Dobbs!. For this purpose, the only thing better is if we could somehow get them to mention Microsoft everywhere they mention Haskell. Any actual

Re: [Haskell-cafe] Dr Dobbs: Time to get good at functional programming

Too bad they didn't pimp Haskell as practical. -- _jsn ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

[Haskell-cafe] class method name scope

What proposals are out there to address the issue of scoping class methods? I always feel I must be careful, when exposing a class definition that I want clients to be able to extend, that I mustn't step on the namespace with semantically appropriate but overly general names (e.g.

Re: [Haskell-cafe] class method name scope

It's not that I like to have a lot of methods in a class, but rather a lot of classes. -- _jsn ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] class method name scope

Oh! Then there is no problem, after all. -- _jsn ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] two type-level programming questions

More monadic? -- _jsn ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: Re[2]: [Haskell-cafe] gmp license == no commercial/closed source haskell software ??

Bulat Ziganshin [EMAIL PROTECTED] wrote: Don wrote: Lionel wrote: From my understanding, the gmp is GPL, GHC statically links it on windows. GMP is *LGPL*. Supporting this is trivial with a dynamically linked / DLL libgmp. the whole problem is that it links in statically, that

ghci and user private groups

User private groups are not an abnormal configuration, but GHCi has such strict security that they are not allowed! :; ghci GHCi, version 6.10.1: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done.Loading package integer ... linking ... done.Loading

Re: ghci and user private groups

Duncan Coutts [EMAIL PROTECTED] wrote: Jason Dusek wrote: I appreciate what you guys are trying to do, but I at the very least, it should be permitted to use a GHCi that is group readable/writable as long as the group name and user name are the same. Hmm. That's a convention

Re: [Haskell-cafe] Sugestion for a basic Utf8 type.

Unlike native Strings, this would have the potential for a runtime parse error at every character. -- _jsn ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] Re: Sugestion for a basic Utf8 type.

So this proposal is more than a UTF8 type, since it encompasses a move away from text as lists. What interfaces would we have to text in this proposal? -- _jsn ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org

Re: [Haskell-cafe] ANN: Real World Haskell, now shipping

Andrew Coppin [EMAIL PROTECTED] wrote: ...it has been my general experience that almost everything obtained from Hackage fails miserably to compile under Windows. (IIRC, one package even used a Bash script as part of the build process!) I haven't seen similar problems on Linux. (But I don't

[Haskell-cafe] bug in time libs?

I'm on 6.10.1, using the libs provided with the binary of GHC for Mac OS X. I was fooling around with the time package in GHCi and something seems to be off. I have included a transcript. If I take a time diff, then the seconds are positive when the picos are negative and vice versa.

[Haskell-cafe] serious defect in system-uuid

I discovered that my UUID type causes a loop when tested for equality. Anyone who is using `system-uuid`, please upgrade to version 1.0.2. -- _jsn ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org

Re: [Haskell-cafe] ANN: Real World Haskell, now shipping

Andrew Coppin [EMAIL PROTECTED] wrote: It seems to be an unwritten law that any package involving non-Haskell components doesn't work on Windoze. Well, I'll have a chance to verify this soon enough. Have you posted your errors somewhere? -- _jsn

Re: [Haskell-cafe] ANN: Real World Haskell, now shipping

Andrew Coppin [EMAIL PROTECTED] wrote: What I *haven't* done yet is read the chapters where they try to claim that database programming is possible in Haskell. I'll have to do that at some point. Maybe this is where they reveal the Secret Formula that makes this stuff actually work

Re: [Haskell-cafe] Re: Suggestion: Syntactic sugar for Maps!

In all fairness, this basically forces you to say trust me to the compiler for something that should be verifiable statically. A typo results in a runtime error -- in a way, this is worse than Perl. Quasi-quotes are really the right answer but hardly simple in this case... -- _jsn

Re: Linking to Haskell code from an external program

Colin Paul Adams [EMAIL PROTECTED] wrote: I've managed to solve it this morning. It was the way I was setting up argc and argv (badly) for the call to hs_init. Doing it properly means there are no longer any crashes with either Eiffel compliler. What is the bad way to set them up? -- _jsn

[Haskell-cafe] varargs zip

It came up on IRC last night that there is no generic zip in Haskell. I decided to write one as an example, but it only half works. When the argument lists are all definitely of one type, instance selection works as expected; however, with numeric types, for example, things don't work

Re: [Haskell-cafe] varargs zip

That would solve the problem that solving the problem would solve, but it does not solve the problem I asked about! -- _jsn ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] varargs zip

Sean Leather [EMAIL PROTECTED] wrote: example = zip [1,2::Int] ['a','b'] [1,b] :: [(Int,Char,String)] BTW, I realized that this example also works in yours. You weren't giving enough type annotations. Yes, exactly. Or in other words, the class definition does not correctly specify the

Re: [Haskell-cafe] Cabal and more than one version

Duncan Coutts [EMAIL PROTECTED] wrote: Jason Dusek wrote: In the ticket, someone says: True though I suspect it looks a bit weird to the uninitiated. We know to read the conditional syntax as an implication constraint which can be applied in either direction but I suspect many

[Haskell-cafe] Cabal and more than one version

I'd like to be able to do something like: if (template-haskell 2.3) cpp-options: -D TH_THE_YOUNGER else cpp-options: -D TH_THE_ELDER I guess this kind of thing is not possible at present? -- _jsn ___ Haskell-Cafe mailing list

Re: [Haskell-cafe] implementing python-style dictionary in Haskell

Did you use Unicode in Python? -- _jsn ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: how is Linux GHC formed?

Simon Marlow [EMAIL PROTECTED] wrote: We just do a normal build, on Fedora 9 boxen. If it works across other distros, it's probably just good luck! With GHC, my luck has been good. I've found that `optl-static` actually causes problems, so I've removed it and things work without it. --

how is Linux GHC formed?

How was the Linux binary for GHC created? I am looking at ways to compile Haskell binaries for Linux that work across distros. So far, I have been using `-static -optl-static` but today there was a weird hiccup with IO -- the Gentoo built binary worked fine on Gentoo but caught SIGPIPE

[Haskell-cafe] Re: reliable (bi)directional pipe to a process

There is actually a real wealth of material on generalizing I/O on your site -- it's definitely something I will be ever more interested in. Now that I think about it, I can remember a time where a program that did a lot of stuff with Amazon would mysteriously run out of file

Re: [Haskell-cafe] Re: reliable (bi)directional pipe to a process

As an aside, my present problem really seems to be fixed -- I am able to move files of more than 2MB from one process to another within my Haskell program. In my program, I take the input file, turn it into a ByteString, pass it to process one, capture the result as a ByteString, pass it

[Haskell-cafe] catting to cat gets stuck at 135K

I've put together a simple test case for a rather annoying problem. I've got a program that drives other programs. For example, it can drive `cat`: :; Simple cat a-file When the file is a little bit greater than 135060 bytes, this program fails to produce any output at all -- I need

Re: [Haskell-cafe] catting to cat gets stuck at 135K

simple exe bytes args= do (i, o, e, p)- runInteractiveProcess exe args Nothing Nothing hPut i bytes s - hGetContents o hClose i return s Yep, that's your problem. forkIO the hPut. Maybe I didn't do enough here -- just

Re: [Haskell-cafe] catting to cat gets stuck at 135K

This does not work either. It should cover all the bases, right? Fork off input, pull things from ouput as they are ready, stop when we reach end of file. If you remove the line `print partial`, the program loops forever; if you keep it, the program stops right there. -- _jsn import

Re: [Haskell-cafe] catting to cat gets stuck at 135K

That was just me being absent-minded -- I have threaded in my Cabal file but was not using it on the command line for my little test script. Thank you for calling it to my attention. -- _jsn ___ Haskell-Cafe mailing list

Re: [Haskell-cafe] catting to cat gets stuck at 135K

I am using 6.8.3 -- it is almost exciting to realize how close I came to 'impossible' instead of 'annoying'. Living on the edge with UNIX IO! -- _jsn ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org

Re: [Haskell-cafe] pure programs

Conal Elliott [EMAIL PROTECTED] wrote: To help me understand your question, would you be unhappy with the following structure? -- runnable main = interact f -- composable f = ... The discipline is to use interact (or another combinator) to wrap a

Re: [Haskell-cafe] pure programs

Jules Bean [EMAIL PROTECTED] wrote: Jason Dusek wrote: Though that seems reasonable, it is not, in general, true. For example,System.Info.osis generally treated as pure, though it is not. It's not clear to me how to disambiguate these born again values from really pure values

[Haskell-cafe] pure programs

Informally, a pure program an executable such that the stream of bytes entering it totally determines the stream of bytes leaving it. Many useful programs that I would like to write in Haskell don't fall into this category -- for example, network servers -- but a lot of their

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