Re: [Haskell] cabal conflicting rules

You probably have some packages of yours installed as user and some others globally. Have a look at: http://www.haskell.org/cabal/FAQ.html#dependencies-conflict I recommend that as soon as you have a running Haskell Platform to always install new packages with cabal install ... --user Thomas

Re: [Haskell] Re: Probably a trivial thing for people knowing Haskell

0.0 CAF System.Directory 125 1 0.00.0 0.00.0 Regards Friedrich ___ Haskell mailing list Haskell@haskell.org http://www.haskell.org/mailman/listinfo/haskell

Re: [Haskell] Re: Probably a trivial thing for people knowing Haskell

ystem 99% cpu 17,836 total Ruby is surely not the speed king of scripting languages, but what Haskell delivers is "way worse" Howerver at least it doesn not crash any longer Regards Friedrich ___ Haskell mailing list Haskell@haskell.org http://www.haskell.org/mailman/listinfo/haskell

Re: [Haskell] Probably a trivial thing for people knowing Haskell

Udo Stenzel <[EMAIL PROTECTED]> writes: >> Friedrich wrote: >> >Ok to be more concrete is the laziness "hidden" here? >> > >> >check_line line sum count = >> >let match = matchRegex regexp line >> >in case match of

Re: [Haskell] Probably a trivial thing for people knowing Haskell

Udo Stenzel <[EMAIL PROTECTED]> writes: >> Friedrich wrote: >> >Ok to be more concrete is the laziness "hidden" here? >> > >> >check_line line sum count = >> >let match = matchRegex regexp line >> >in case match of

Re: [Haskell] Probably a trivial thing for people knowing Haskell

Thanks, I just figured out that I run out of file descriptors with reading them all at once. But I probably can try the countDownloads function. We'll see how that works. Regards Friedrich ___ Haskell mailing list Haskell@haskell.org

Re: [Haskell] Probably a trivial thing for people knowing Haskell

Taral <[EMAIL PROTECTED]> writes: > On Sat, Oct 18, 2008 at 1:50 AM, Friedrich > <[EMAIL PROTECTED]> wrote: >> I've written just a few programs in Haskell one in a comparison for a >> task I had "nearly daily". >> >> The code analyzes Apac

Re: [Haskell] Probably a trivial thing for people knowing Haskell

"Brandon S. Allbery KF8NH" <[EMAIL PROTECTED]> writes: > On 2008 Oct 19, at 2:07, Friedrich wrote: >> Howerver even if Strings are bad I can not see why they are hanging >> around so long. I open a file a read it line by line and I close the >> file so all

Re: [Haskell] Probably a trivial thing for people knowing Haskell

"Brandon S. Allbery KF8NH" <[EMAIL PROTECTED]> writes: > On 2008 Oct 19, at 2:26, Friedrich wrote: >> Paul Johnson <[EMAIL PROTECTED]> writes: >>>> (By the way, putting in the top level type declarations helps a lot >>> when you make a mistake

Re: [Haskell] Probably a trivial thing for people knowing Haskell

"Brandon S. Allbery KF8NH" <[EMAIL PROTECTED]> writes: > On 2008 Oct 19, at 2:07, Friedrich wrote: >> Howerver even if Strings are bad I can not see why they are hanging >> around so long. I open a file a read it line by line and I close the >> file so all

Re: [Haskell] Probably a trivial thing for people knowing Haskell

Paul Johnson <[EMAIL PROTECTED]> writes: > Friedrich wrote: >> I've written just a few programs in Haskell one in a comparison for a >> task I had "nearly daily". >> > The first thing I notice is that this is clearly a direct translation >> From

Re: [Haskell] Probably a trivial thing for people knowing Haskell

;-) Howerver even if Strings are bad I can not see why they are hanging around so long. I open a file a read it line by line and I close the file so all read string are "garbage" and getting rid of them should not be that hard or should it? Regards Friedrich

[Haskell] Probably a trivial thing for people knowing Haskell

should. I think I've overseen something which is bad written. Would you mind to tell me where I did "extraordinarily" bad. With best regards Friedrich ___ Haskell mailing list Haskell@haskell.org http://www.haskell.org/mailman/listinfo/haskell

A question regarding haskell mode for Emacs

I wonder if there are some known troubles. This mode yesterday nearly drive me nuts. Indentation seem to be ok from the layout, but I got complains about block closed to early, missing ; ... Regards Friedrich -- for e-mail reply remove all after .com

Re: Another question about higher order functions

ges/drscheme/ It runs on a lot of platform. I've running it under Linux and had it installed under Windows too. Regards Friedrich -- for e-mail reply remove all after .com

Re: Another question about higher order functions

g.lisp have pointed out that I'm too much influenced by Scheme and that my looping constructs look terrible ;-). > > Higher-orderness, is used unwisely, can be bad. Isn't unwise use of other things not as bad? ;-) Regards Friedrich -- for e-mail reply remove all after .com

Re: Another question about higher order functions

it for explicit recursion. And it's anyway a better training for me to understand functional programming. > > BTW, your first two branches can be combined: > > makeChange 0 = map (const 0) I added it later, before just one branch was there, it was just playing around a bit to see

Re: Another question about higher order functions

I know quite well) ;-) I would really appriciate simular efforts as one can find e.g in DrScheme for Haskell. DrScheme is IMHO one of the nicest IDEs for learning Scheme. The online documentation is quite well and the examples are well choosen. I can imagine that it's not easiy or honorable to do, but I as a beginner would really appriciate improvements in that area. With best regards Friedrich -- for e-mail reply remove all after .com

Another question about higher order functions

coins) = 0:makeChange 0 coins makeChange 0 [] = [] makeChange n (coin_val:coins) = let (how_many,rest) = divMod n coin_val in how_many:makeChange rest coins could be replaces by some combination of HOFs. Could someone give me a hand here? Thanks in advance Friedrich

Re: A small problem.

. I'll have to wait and try till I found what list comprehansion stands for. Thanks anyway Friedrich -- for e-mail reply remove all after .com

Re: A small problem.

Jan Skibinski <[EMAIL PROTECTED]> writes: > On 22 Aug 2000, Friedrich Dominicus wrote: > > > Dear Haskell Fans, I'm afraid that I'm a bit dumb but I'm somewhat > > stuck. > > > > Can someone give me a hand on this problem > > >

A small problem.

der functions. My base idea is splitting up List of Vertices into a list of exactly three vertices calculating that area and adding them all. BTW, I do not like the above solution anyway. It's too bulky. So if one has another idea on how to tackle it, I would be very thankful to some h

Re: The importance and relevance of FP

I had > to use one language for everything, CL would definitely be a > candidate. Of course, Haskell is so much prettier. I'm on my way learning both languages. IMO Lisp a more programmer friendly language. I guess both are simular difficult (or easy it's a matter of taste) to lean. A

Re: The importance and relevance of FP

7;s the "right" way. I hardly believe something simular will exist. > I ask the question, If Lisp is not a 'functional language', then what is > it? I would think Lisp among other things is a functional language. Regards Friedrich -- for e-mail reply remove all after .com

Re: The importance and relevance of FP

n't a FP language? I think among others it is one. And the combination of features makes Lisp IMHO outstanding even nowadays. Regards Friedrich -- for e-mail reply remove all after .com

Re: Where do I start ?

here is not debugger available for Haskell AFAIK) Common Lisp (nice development environements, extremly flexible) Smalltalk (off topic here, I think) Regards Friedrich -- for e-mail reply remove all after .com

How to debug Haskell programs?

did not get it right. Any suggestions? Friedrich

Re: string to Integer

>>>>> "AvI" == Arjan van IJzendoorn <[EMAIL PROTECTED]> writes: AvI> Hello Friedrich, AvI> Turning a string into an integer is easy with the Prelude function 'read': AvI> n :: Integer AvI> n = read "-34232" Yes, oth

string to Integer

rs out of a String and that's it. I can't believe there isn't some function for that. So my question is: Exists such a function or do I have to write it on my own? And the other is what would you think would be a good Haskell soluton for turing a string to an Integer. I'm using HUGS from Feb 2000 Regards Friedrich

Re: A hard core game programmers view

e choice just between awk and Perl I would use Perl. But because I have other options I can use whatever I like and feel happy. And so do the Perl lovers. Isn't that wonderful? Regards Friedrich

Re: A Haskell-Shell

;re rigth, and I better had just asked if someone like to have a Haskell Shell. I just thought that this would be a nice application. Regards Friedrich

A Haskell-Shell

Just wondering if someone uses Hugs for writing Unix-Shell Scripts. Or what would you think about a Haskell-Shell. SCSH (a Scheme-Shell) brought me on that idea. Don't you think that would be a nice thing? Regards Friedrich

Re: Haskell conventions (was: RE: how to write a simple cat)

PAtoVA? > PA_to_VA? [Whatever PA and VA means] > If that would be true we just can drop space between words. The closest to space in words is _. But it is completly unusual do write MixedCaSe in normal text. Just my 2 cents Friedrich

Re: how to write a simple cat

rogram you and you have such a trouble with that problem in Eiffel you are very welcome to send a note to the Eiffel- mailing lists. I don't think that you will get an answer, first learn OOP than ask Regards Friedrich

Re: how to write a simple cat

Hannah Schroeter wrote: > > Hello! > > On Fri, Jun 04, 1999 at 12:18:31PM +0200, Friedrich Dominicus wrote: > > > [...] > > > > splitFilterMap unSplitFn afterMap filterPredicate beforeMap splitFn = > > > unSplitFn . map afterMap . filter

Re: how to write a simple cat

Hannah Schroeter wrote: > > Hello! > > On Fri, Jun 04, 1999 at 12:29:45PM +0200, Friedrich Dominicus wrote: > > [...] > > > > What is difficult is that by using some predefined function, one can > > > express very much in very small code. I believe Has

Re: how to write a simple cat

Lennart Augustsson wrote: > > Friedrich Dominicus wrote: > > > That might be good advice but I/O is one of the most essential things > > and I have to know how to use it proper for writing small skripts. > > Actually, you can do a lot without learning about I

Re: how to write a simple cat

lter function from \l -> ... to > \(_linenumber, l) -> ..., to extract the line content from the > (line number, content) pair. > > For the final output, you must convert the remaining (number,content) > pairs from fl to single strings containing the line number in textual > form, i.e. > let fl' = map (\(number, content) -> show number ++ "\t" ++ content) fl > putStr (unlines fl') > This comments helped me. So I think I will put them under my pillow;-) Regards and thanks Friedrich

Re: how to write a simple cat

k with splitFilterMap. Nevertheless is shows me all way lead to ROME ;-) I re-wrote that stuff in Python and I've to admit it's way easier to understand for me (not even talking of writing). But I think it was a good example to learn how FP-trained would do it. It's a long long way to go;-) Regards Friedrich

Re: how to write a simple cat

or should I try to learn that kind of programming. I have some problems with it because a lot of work is just done in one Method. My knowledge comes from OO-programming and there it wouldn't be good style to do so much in one function. Regards Friedrich

Re: how to write a simple cat

Sven Panne wrote: > > Friedrich Dominicus wrote: > >[...] How can I combine the output with a line-number can I put that > > into the filter? Or do I have to found another solution? > > Don't fear! Mr. One-Liner comes to the rescue:;-) > >longerTha

Re: how to write a simple cat

Hannah Schroeter wrote: > > Hello! > > On Tue, Jun 01, 1999 at 06:58:32AM +0200, Friedrich Dominicus wrote: > > [...] > > > I want to do the following, read a file line by line and finding out > > which line is longer than x-chars. I want to print out which li

Re: how to write a simple cat

Hannah Schroeter wrote: > > Hello! > > On Mon, May 31, 1999 at 06:01:31PM +0200, Friedrich Dominicus wrote: > > Hannah Schroeter wrote: > > > > Hello! > > > > On Fri, May 28, 1999 at 08:00:27AM +0200, Friedrich Dominicus wrote: > > > >

Re: how to write a simple cat

Hannah Schroeter wrote: > > Hello! > > On Fri, May 28, 1999 at 08:00:27AM +0200, Friedrich Dominicus wrote: > > I wrote before with my trouble understanding hugsIsEOF. But I don't have > > found a clean way just to write a cat. Can s.o give me a hand? > > i

how to write a simple cat

I wrote before with my trouble understanding hugsIsEOF. But I don't have found a clean way just to write a cat. Can s.o give me a hand? Regards Friedrich

I/O Question for Haskell

uld s.o. give me a hint how I can get this program running? Regards Friedrich