Hello!
Please advise haskell libraries similar to convert real-world HTML to
well-formed XML.
I need something similat to HTML Tidy library:
http://tidy.sourceforge.net/
Thanks!
Dmitri
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I am trying to derive MyOrd class from Eq (Prelude):
class Eq a = MyOrd a where
(%=), (%), (%=) :: a - a - Bool
x %= y = (x y || x == y)
x % y = y x
x %= y = (y x || x == y)
I get these errors:
ClassTest.hs:28:21:
Could not deduce (Ord a) from the context
On 7/25/06, Jared Updike [EMAIL PROTECTED] wrote:
I am trying to derive MyOrd class from Eq (Prelude):
class Eq a = MyOrd a where
(%=), (%), (%=) :: a - a - Bool
x %= y = (x y || x == y)
x % y = y x
x %= y = (y x || x == y)
Q: What's wrong? Why 'Ord'
I am trying to solve a problem from The Craft of Functional Programming book:
14.38 ... define the function:
data Maybe a = Nothing | Just a
composeMaybe :: (a - Maybe b) - (b - Maybe c) - (a - Maybe c)
using functions:
squashMaybe :: Maybe (Maybe a) - Maybe a
squashMaybe (Just (Just x)) =
type
f1 :: (c - Maybe d) - (t - Maybe c) - t - Maybe (Maybe d)
substituting different type variable names gives
f1 :: (b - Maybe c) - (a - Maybe b) - a - Maybe (Maybe c)
So you are very close to finishing... :)
Hope this helps.
DeeJay
Dmitri O.Kondratiev wrote:
I am trying to solve a problem
Going through Haskell. The Craft of Functional Programming book , in
section 16.8 I found a Set module example.
Module declarations starts with:
import List hiding (union)
Set module here is built with list and uses among other things list
comparison functions such as (==) and (=).
For
On 2/16/07, Jules Bean [EMAIL PROTECTED] wrote:
Actually, lists are partly defined in the Prelude, with auxiliary
functions in Data.List. In particular, = for List is defined in the
Prelude. Or rather, I should say, the Ord instance for lists is defined
in the prelude (and only if the type
]
wrote:
2008/5/19 Dmitri O.Kondratiev [EMAIL PROTECTED]:
I am trying to understand State monad example15 at:
http://www.haskell.org/all_about_monads/html/statemonad.html
Hi Dmitri,
I'm not sure you need to understand everything about Monad and do-notation
to use the State Monad. So I
:
On Wed, May 21, 2008 at 8:42 AM, Dmitri O.Kondratiev [EMAIL PROTECTED]
wrote:
So let's start with fundamental and most intriguing (to me) things:
getAny :: (Random a) = State StdGen a
getAny = do g - get -- magically get the current StdGen
First line above declares a data type:
State
Jules,
Stupid question, please bear with me:
x :: Int -- x declared, but not constructed
x = 1 -- x constructed
s1 :: State StdGen a -- s1 declared, yes, but why s1 is *also already
constructed* ?
On Wed, May 21, 2008 at 6:54 PM, Jules Bean [EMAIL PROTECTED] wrote:
Dmitri O.Kondratiev wrote
a random value.
--}
On Wed, May 21, 2008 at 10:31 PM, Olivier Boudry [EMAIL PROTECTED]
wrote:
On Wed, May 21, 2008 at 11:10 AM, Dmitri O.Kondratiev [EMAIL PROTECTED]
wrote:
But how will 'g1' actually get delivered from 'makeRandomValueST g1' to
invocation of 'getAny' I don't yet understand
{--
I try to define class Store that will group types implmenting different
storage mechanisms .
All types should support two functions:
1) put (key, value) pair into storage
2) get value from storage corresponding to the given key
As an example I start with the following storage types:
--}
--
{--
Thanks!
Yes, you got it right - I want to make explicit the fact that the type s
depends on k and v.
So I followed your advice and used the most simple way to do what I need:
--}
class Store s where
put :: Eq k = (k, v) - s k v - s k v
get :: Eq k = k - s k v - Maybe v
instance Store
What is the best way to extend array?
I would use a list instead of array as it is easy to append, but need to
have random access to its elements later.
So in fact I need to start with an integer array of size 1. Next I may need
to add new elements to this array or modify values of the existing
. This is
usually fairly efficient for most applications.
By the way, depending on the type of the data you're putting into
these arrays, Data.ByteString might be a good choice as well.
On Thu, Jul 10, 2008 at 12:12 PM, Felipe Lessa [EMAIL PROTECTED]
wrote:
2008/7/10 Dmitri O.Kondratiev [EMAIL
How does Data.Sequence
http://www.haskell.org/ghc/docs/latest/html/libraries/containers/Data-Sequence.html
compares with ArrayRef for appending and accessing arrays efficiently ?
On Fri, Jul 11, 2008 at 4:58 PM, Chaddaï Fouché [EMAIL PROTECTED]
wrote:
2008/7/11 Dmitri O.Kondratiev [EMAIL
later.
That's why I need a collection both indexed and able to extend also.
I think that Data.Sequence will do for the task, don't you think?
On Fri, Jul 11, 2008 at 7:23 PM, Chaddaï Fouché [EMAIL PROTECTED]
wrote:
2008/7/11 Dmitri O.Kondratiev [EMAIL PROTECTED]:
How does Data.Sequence
http
Thanks for your help, guys! I like simple solutions most of all :)
On Fri, Jul 11, 2008 at 9:44 PM, Reid Barton [EMAIL PROTECTED]
wrote:
This doesn't require any fancy data structures.
Instead store this as a list of pairs [([10,6,80,25,6,7], 5), ...]
and it'll be easy to write a
Using GHC 6.8.2 and haddock 2.0.0.0. in WinXP (SP3) I am trying to follow
instructions from How to write a Haskell
programhttp://www.haskell.org/haskellwiki/How_to_write_a_Haskell_program#Build_some_haddock_documentation
.
Everything goes well, until I try to generate html documentation for the
Neil,
Thanks for the quick response! I got haddock from its site (
http://haskell.org/haddock/#Download )using the link that says:
Windows: a binary
distribution http://haskell.org/haddock/dist/haddock-2.0.0.0-Win32.zip is
available, just unzip and go.
My configuration:
C:\wks\haqrunhaskell
Any ideas on how much work needs to be done for using Haskell on PPC
Windows Mobile platform?
It would be interesting to use PPC as:
1) Haskell learning tool, so small code snipets could be entered and
run directly on hand-held (REPL). How hard is it to port Hugs to PPC
for this? Do any other
I am sorry for confusion that abreviation PPC may cause in the text of
my message. In this context I used 'PPC' to refer to Pocket PC and
nothing else.
Sorry again.
On 3/31/06, Dmitri O.Kondratiev [EMAIL PROTECTED] wrote:
Any ideas on how much work needs to be done for using Haskell on PPC
Hi Neil,
Thanks for your reply.
Starting from YHC porting pages the only source for Win32 port I
found is WinHaskell.
[http://www-users.cs.york.ac.uk/~ndm/projects/winhaskell.php]
I have not yet found which port it is: Hugs, YHc, ...?
Also there is a thing called WinHugs at
A few simple questions:
What standard library function can be used to replace substring in a string
(or sub-list in a list) ?
I wrote my own version, please criticize:
-- replace all occurances of 123 with 58 in a string:
test = replStr abc123def123gh123ikl 123 58
{--
In a string replace all
PROTECTED] wrote:
Dmitri O.Kondratiev wrote:
I wrote my own version, please criticize:
-- replace all occurances of 123 with 58 in a string:
test = replStr abc123def123gh123ikl 123 58
This is a tricky problem: first of all, you fail your own test! ;-)
*Main test
abc58def58gh58ikl58
?
then new ++ loop rest -- yes: replace it
else head str : loop (tail str) -- no: keep looking
n = length old
On Tue, Jul 22, 2008 at 8:21 PM, Dmitri O.Kondratiev [EMAIL PROTECTED]
wrote:
Roberto thanks!
Shame on me, to post code without enough testing :(
Yet
Please advise how to write Unicode string, so this example would work:
main = do
putStrLn Les signes orthographiques inclus les accents (aigus, grâve,
circonflexe), le tréma, l'apostrophe, la cédille, le trait d'union et la
majuscule.
I get the following error:
hello.hs:4:68:
lexical error
Please help, to locate in GHC distribution SOEGraphics library from
Paul Hudak, book The Haskell School of Expression
(http://www.haskell.org/soe/ )
Thanks!
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I am trying to define instance Show[MyType] so
show (x:xs :: MyType) would return a single string where substrings
corresponding to list elements will be separated by \n.
This would allow pretty printing of MyType list in several lines instead of
one, as default Show does for lists.
For example:
On Fri, Dec 5, 2008 at 1:29 AM, Martijn van Steenbergen
[EMAIL PROTECTED] wrote:
Dmitri O.Kondratiev wrote:
-- How to define Show [MyType] ?
Define instance Show MyType and implement not only show (for 1 value of
MyType) but also showList, which Show provides as well. You can do all
characters \ come from in this case?
2)How showList function 'removes' characters \ from the output?
What magic goes behind the scenes here?
--}
Thanks!
Dmitri
On 12/6/08, Daniel Fischer [EMAIL PROTECTED] wrote:
Am Samstag, 6. Dezember 2008 00:13 schrieb Dmitri O.Kondratiev:
Thanks everybody for your
I am learning Haskell working through Simon Thompson book Haskell The Craft
of Functional Programming (second edition). Solving problems in the book
with more or less success I arrived almost to the end of the book at the
section 17.5 Case study: parsing expressions.
Most probably the question I
Now, in the 17.5 section of a book one may see the following declarations:
succeed :: b - Parse a b
*Before looking at 'succeed' function definition* one may think that
'succeed' is a function of *one* argument of type 'b' that returns object
of
type 'Parse a b'.
Antti-Juhani Kaijanaho
Please see my questions inside comments {-- --} :
Thanks!
---
module Parser where
import Data.Char
type Parse a b = [a] - [(b, [a])]
{--
Newbie: a parser for a list of objects?
I am working with the section 17.5 Case study: parsing expressions of the
book Haskell The Craft of Functional
Fischer [EMAIL PROTECTED] wrote:
-Ursprüngliche Nachricht-
Von: Dmitri O.Kondratiev [EMAIL PROTECTED]
Gesendet: 26.03.07 16:44:12
An: haskell-cafe@haskell.org
Betreff: [Haskell-cafe] Newbie: a parser for a list of objects?
Please see my questions inside comments {-- --} :
Thanks
Dmitri O.Kondratiev:
Thanks Daniel!
Things are getting more in shape, yet I still can not fully comprehend
the
expression:
((p * pList p) `build` (uncurry (:)))
where
(*) :: Parse a b - Parse a c - Parse a (b, c)
(*) p1 p2 inp = [((x,y), rem2) |(x, rem1) - p1 inp, (y, rem2) - p2
rem1
, 3), (123, )]
Thanks again Daniel for your great help!
Dima
On 3/28/07, Daniel Fischer [EMAIL PROTECTED] wrote:
Am Mittwoch, 28. März 2007 11:57 schrieb Dmitri O.Kondratiev:
Daniel,
I am still trying to figure out the order of function applications in
the
parser returning list of objects (I
Monad class contains declaration
*fail* :: String - m a
and provides default implementation for 'fail' as:
fail s = error s
On the other hand Prelude defines:
*
error* :: String - a
which stops execution and displays an error message.
Questions:
1) What value and type 'error' actually
?
On 6/6/07, Tillmann Rendel [EMAIL PROTECTED] wrote:
Dmitri O.Kondratiev wrote:
Monad class contains declaration
*fail* :: String - m a
and provides default implementation for 'fail' as:
fail s = error s
On the other hand Prelude defines:
*
error* :: String - a
which stops execution
I am trying to use Graphics.SOE (that was present at least in GHC 6.4) to
go through Simple Graphics examples as described in Pail Hudak book The
Haskell School of Expression. Learning functional programming through
multimedia.
It looks like Graphics.SOE does not anymore exist in GHC 6.6.1.
*Andrea Rossato* wrote:
haskell-cafe%40haskell.org?Subject=%5BHaskell-cafe%5D%20GHC%206.6.1%3A%20Where%20is%20Graphics.SOE%20%3FIn-Reply-To=53396d9e0707170752q6769729es68d214639b69a789%40mail.gmail.com
Hi!
as far as I know what you are looking for (Graphics.SOE) is part of
HGL. Have a look
On 7/17/07, Malte Milatz [EMAIL PROTECTED] wrote:
Dmitri O.Kondratiev:
It looks like Graphics.SOE does not anymore exist in GHC 6.6.1.
Where one can get it or what to use instead of it?
You may try Gtk2Hs, which includes an implementation of SOE, called
Graphics.SOE.Gtk. (It works
Olivier Boudry [EMAIL PROTECTED] wrote:
(Wed Jul 18 11:56:56 EDT 2007)
Hi Dmitri,
I built gtk2hs on Windows with GHC 6.6.1 and gtk2hs-0.9.11. Here's are the
steps that worked for me: (not sure I didn't missed some)
First you need to install a GTK+ development package for windows. I think
mine
!
Dima
On 7/23/07, Duncan Coutts [EMAIL PROTECTED] wrote:
On Fri, 2007-07-20 at 13:47 +0400, Dmitri O.Kondratiev wrote:
Oliver, thanks!
I tried that, yet have some problems.
Questions:
1) Should I ignore autoreconf errors?
I've never managed to get autoconf working on windows. I always
Hello,
I am looking for a site providing on-line automatic judge for Programming
Challenges that can be coded in Haskell.
For example this site:
http://www.programming-challenges.com
provides lots of interesting programming provlems:
http://www.programming-challenges.com/pg.php?page=index
Yet,
3n+1 is the first, warm-up problem at Programming Chalenges site:
http://www.programming-challenges.com/pg.php?page=downloadproblemprobid=110101format=html
(This problem illustrates Collatz conjecture:
http://en.wikipedia.org/wiki/3n_%2B_1#Program_to_calculate_Collatz_sequences
)
As long as the
Angel de Vicente wrote:
On 14/04/11 10:29, Dmitri O.Kondratiev wrote:
* I am looking for a site providing on-line automatic judge for
** Programming Challenges that can be coded in Haskell.
** For example this site:
** http://www.programming-challenges.com
** provides lots of interesting
Thanks, Felipe!
Sure I will try to code solution myself. Doing it all by yourself is the
main fun of everything, isn't it?
I was just asking about the *idea* of implementing cache in Haskell, in
general, not just in this case only.
On Thu, Apr 14, 2011 at 3:11 PM, Felipe Almeida Lessa
Thanks, everybody!
Your feedback is a great food for my mind (as Lewis Carroll once wrote :)
When asking how to implement cache in Haskell I was hopping that there
exists some solution without using Data.Array, more functional approach,
if I may say so ...
I must be wrong, though (need more time
Hello,
I am trying to solve a simple task, but got stuck with double recursion -
for some reason not all list elements get processed.
Please advice on a simple solution, using plane old recursion :)
*** Task:
From a sequence of chars build all possible chains where each chain consists
of chars
For some reason, my previous message got truncated, so I repeat it in hope
that it will come complete this time:
-- Forwarded message --
From: Dmitri O.Kondratiev doko...@gmail.com
Date: Sat, May 28, 2011 at 3:47 PM
Subject: Please help with double recursion
To: haskell-cafe
On Sat, May 28, 2011 at 3:57 PM, Daniel Fischer
daniel.is.fisc...@googlemail.com wrote:
On Saturday 28 May 2011 13:47:10, Dmitri O.Kondratiev wrote:
Hello,
I am trying to solve a simple task, but got stuck with double recursion
- for some reason not all list elements get processed
On Mon, May 30, 2011 at 11:26 AM, Richard O'Keefe o...@cs.otago.ac.nz wrote:
On 28/05/2011, at 11:47 PM, Dmitri O.Kondratiev wrote:
Hello,
I am trying to solve a simple task, but got stuck with double recursion -
for some reason not all list elements get processed.
Please advice
Hello,
I am trying to detect signal patterns in a system with numerous signals
overlaying each other in time. I am aware that there is a whole class of
problem solving methods for this task, yet trying my own algorithm, that may
be wrong of course :)
Next I use a simple example to describe the
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
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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
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.
Hello,
Please advise on existing serialization libraries.
I need a simple way to serialize Data.List and Data.Map to plain text
files.
Thanks,
Dmitri
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from it
another list, save it to text file, etc.
I wonder how Haskell will distribute memory between the buffer for
sequential element access (list elements, map tree nodes) and memory for
computation while reading in list, Data.Map from file?
On 9 June 2011 08:23, Dmitri O.Kondratiev doko
On Thu, Jun 9, 2011 at 7:23 PM, Max Bolingbroke
batterseapo...@hotmail.comwrote:
Hi Dmitri,
On 9 June 2011 09:13, Dmitri O.Kondratiev doko...@gmail.com wrote:
I wonder how Haskell will distribute memory between the buffer for
sequential element access (list elements, map tree nodes
On Thu, Jun 9, 2011 at 11:31 AM, Max Bolingbroke batterseapo...@hotmail.com
wrote:
If you want plain text serialization, writeFile output.txt . show
and fmap read (readFile output.txt) should suffice...
Max
This code works:
main = do
let xss = [[1,2,3],[4,5,6],[7,8],[9]]
On Fri, Jun 10, 2011 at 4:13 PM, Daniel Fischer
daniel.is.fisc...@googlemail.com wrote:
On Friday 10 June 2011, 13:49:23, Dmitri O.Kondratiev wrote:
On Thu, Jun 9, 2011 at 11:31 AM, Max Bolingbroke
batterseapo...@hotmail.com
wrote:
If you want plain text serialization, writeFile
Thanks for the excellent explanation! :
On Fri, Jun 10, 2011 at 4:49 PM, Daniel Fischer
daniel.is.fisc...@googlemail.com wrote:
On Friday 10 June 2011, 14:25:59, Dmitri O.Kondratiev wrote:
Two questions:
1) Why to use 'fmap' at all if a complete file is read in a single line
of text
Please help to find pre-compiled binary libraries of Gtk+ for Win32.
Gtk2Hs insatll instructions at:
http://code.haskell.org/gtk2hs/INSTALL
tells us:
[quote]
Building on Windows
Installation on Windows is nearly as easy as on Unix platforms. However, you
need to download
I am trying to install HaskellCharts at:
http://dockerz.net/twd/HaskellCharts
Running:
cabal update
cabal install gtk2hs-buildtools
cabal install gtk
cabal install chart
goes well untill 'cabal install chart' which results in:
C:\wks\RCAcabal install chart
Resolving
Trying to install the same stuff on Mac OS X 10.6.7 I get problems both with
gtk2hs-buildtools and pkg-config, (see below).
Any ideas where to get pre-built glib and pkg-config both for Win32 and Mac
OS X?
== Problems on Mac OS X with gtk2hs-buildtools :
cabal install gtk
Resolving
On Sat, Jun 4, 2011 at 1:56 AM, Ivan Lazar Miljenovic
ivan.miljeno...@gmail.com wrote:
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
On Sat, Jun 11, 2011 at 12:54 AM, Henning Thielemann
lemm...@henning-thielemann.de wrote:
On Sat, 11 Jun 2011, Dmitri O.Kondratiev wrote:
That's what I get (see below). What else should I do to install gnuplot?
~/wks/haskell-wks/gnuplot/gnuplot-0.4.2/srcghc -v Demo.hs
Do you really
I am looking for platform-independent library to generate simple histograms
in png format.
Does such thing exist?
Thanks!
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It looks like GHC, 7.0.3 Haskell Hierarchical Libraries documentation
generated for Win32, that goes with Haskell Platform installation package,
does not have a section on Data.Time module.
How can that be?
I need to convert a string of the form ,10/11/2009 7:04:28 PM to Haskell
type that can be
Sorry for typo - I need subtract dates (no 'abstracting') :
On Tue, Jun 14, 2011 at 3:49 PM, Dmitri O.Kondratiev doko...@gmail.comwrote:
It looks like GHC, 7.0.3 Haskell Hierarchical Libraries documentation
generated for Win32, that goes with Haskell Platform installation package,
does
at
http://hackage.haskell.org/packages/archive/time/1.2.0.5/doc/html/Data-Time-Format.html
?
Is it enough?
2011/6/14 Dmitri O.Kondratiev doko...@gmail.com
Sorry for typo - I need subtract dates (no 'abstracting') :
On Tue, Jun 14, 2011 at 3:49 PM, Dmitri O.Kondratiev
doko...@gmail.comwrote
It would also help to see a simple example of parsing 10/11/2009 7:04:28
PM to time and date objects.
On Tue, Jun 14, 2011 at 4:41 PM, Dmitri O.Kondratiev doko...@gmail.comwrote:
Yes, thanks. I just wonder why documentation for this particular module
(Data.Time) is missing from GHC, 7.0.3
I am trying to convert data string to time:
import Data.Time
import Data.Time.Format
import Locale
ds = 10/11/2009 7:04:28 PM
t = parseTime defaultTimeLocale %D %H:%M:%S %p ds :: Maybe UTCTime
and get Nothing.
What is wrong?
Thanks !
Dmitri.
___
On Wed, 15 Jun 2011 00:33:56 +0400
Dmitri O.Kondratiev doko...@gmail.com wrote:
I am trying to convert data string to time:
import Data.Time
import Data.Time.Format
import Locale
ds = 10/11/2009 7:04:28 PM
t = parseTime defaultTimeLocale %D %H:%M:%S %p ds :: Maybe UTCTime
Which platform - Mac OS X, Linux or Win32 is best for development with GHC
today?
How are things with Ubuntu? It was quite a while already that I used Haskell
on Linux. Today I have to code on Win32 and Mac OS X. Installing extra
libraries caused most of the pains for me on Win32 - for example
On Wed, Jun 15, 2011 at 2:34 AM, Henning Thielemann
lemm...@henning-thielemann.de wrote:
On Wed, 15 Jun 2011, Dmitri O.Kondratiev wrote:
Which platform - Mac OS X, Linux or Win32 is best for development with GHC
today?
How are things with Ubuntu? It was quite a while already that I used
Hi, Yitz!
Your example puts scattered around pieces in place, thanks a lot!
On Wed, Jun 15, 2011 at 9:49 AM, Yitzchak Gale g...@sefer.org wrote:
Dmitri O.Kondratiev wrote:
It would also help to see a simple example of parsing 10/11/2009 7:04:28
PM to time and date objects.
Let's assume
' function?
3) How to convert UTCTime to Data.Time.Calendar.Day and back to UTCTime?
Thanks!
On Wed, Jun 15, 2011 at 12:55 PM, Dmitri O.Kondratiev doko...@gmail.comwrote:
Hi, Yitz!
Your example puts scattered around pieces in place, thanks a lot!
On Wed, Jun 15, 2011 at 9:49 AM, Yitzchak Gale g
*Ketil Malde* ketil at malde.org
haskell-cafe%40haskell.org?Subject=Re%3A%20%5BHaskell-cafe%5D%20Best%20platform%20for%20development%20with%20GHC%3FIn-Reply-To=%3C8739jb60hv.fsf%40malde.org%3E
writes:
I use Ubuntu. Most stuff is fairly up-to-date, but even with six-month
releases, it's lagging
Sorry if this question was asked billions of times already, but I can not
find a simple string tokenizer.
All I need is to split a line in chunks at specified delimiter such as (,),
nothing more. Don't want to write it myself for two reasons: 1) have to
write lots of other code in very short time
/archive/split/0.1.4/doc/html/Data-List-Split.html
On Jun 15, 2011, at 12:21 PM, Dmitri O.Kondratiev wrote:
Sorry if this question was asked billions of times already, but I can not
find a simple string tokenizer.
All I need is to split a line in chunks at specified delimiter such as (,),
nothing
On win32 cabal install --prefix=$HOME --user fails:
cabal install --prefix=$HOME --user
Resolving dependencies...
Configuring split-0.1.4...
cabal: expected an absolute directory name for --prefix: $HOME
cabal: Error: some packages failed to install:
split-0.1.4 failed during the configure step.
Hi,
Data.Map has many great functions, yet I could not find the one that allows
from one map create another map where keys are values and values are keys of
the first one.
Something like:
transMap:: (Ord k, Ord a) = Map k a - Map a k
Does such function exist?
Thanks!
On Thu, Jun 16, 2011 at 5:38 PM, Johan Tibell johan.tib...@gmail.comwrote:
On Thu, Jun 16, 2011 at 3:01 PM, Dmitri O.Kondratiev doko...@gmail.com
wrote:
Hi,
Data.Map has many great functions, yet I could not find the one that
allows
from one map create another map where keys are values
On Thu, Jun 16, 2011 at 6:18 PM, Ryan Yates fryguy...@gmail.com wrote:
There is a nice table in the cabal docs that explains how prefix gets used:
http://www.haskell.org/ghc/docs/7.0.4/html/Cabal/builders.html#simple-paths
For Vista and above C:\Documents and settings\myusername\ is
Hi,
This time I am looking for a simple CSV parser that supports commas and
quotes. I have no time now to learn Parsec, so I hope to find something
simple and easy to use.
Thanks!
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On Fri, Jun 17, 2011 at 1:27 AM, Felipe Almeida Lessa
felipe.le...@gmail.com wrote:
On Thu, Jun 16, 2011 at 6:21 PM, Dmitri O.Kondratiev doko...@gmail.com
wrote:
This time I am looking for a simple CSV parser that supports commas and
quotes. I have no time now to learn Parsec, so I hope
On Fri, Jun 17, 2011 at 1:33 AM, Henning Thielemann
lemm...@henning-thielemann.de wrote:
How could it miss my lovely package named spreadsheet? It provides a lazy
parser.
Installing spreadsheet:
cabal install
Resolving dependencies...
cabal: cannot configure explicit-exception-0.1.6. It
On Fri, Jun 17, 2011 at 2:05 AM, Henning Thielemann
lemm...@henning-thielemann.de wrote:
On Fri, 17 Jun 2011, Dmitri O.Kondratiev wrote:
How to make cabal install all the dependencies? I couldn't find this in
the docs at:
http://www.haskell.org/haskellwiki/Cabal-Install
Usually, 'cabal
On Fri, Jun 17, 2011 at 2:13 AM, Dmitri O.Kondratiev doko...@gmail.comwrote:
On Fri, Jun 17, 2011 at 2:05 AM, Henning Thielemann
lemm...@henning-thielemann.de wrote:
On Fri, 17 Jun 2011, Dmitri O.Kondratiev wrote:
How to make cabal install all the dependencies? I couldn't find
On Fri, Jun 17, 2011 at 2:27 AM, Henning Thielemann
lemm...@henning-thielemann.de wrote:
I see. I had fixed the problem locally long time ago, but somehow missed
upload to Hackage. Try the updated package, please.
Ok great! Installed (with some warnings, see below), thank you!
I'll try it
On Fri, Jun 17, 2011 at 2:37 AM, Henning Thielemann
lemm...@henning-thielemann.de wrote:
On Thu, 16 Jun 2011, Felipe Almeida Lessa wrote:
[1]
http://hackage.haskell.org/**package/bytestring-csvhttp://hackage.haskell.org/package/bytestring-csv
[2]
Hi,
I try to parse csv file with Text.CSV, like this:
import Text.CSV
import System
main = do
[inpFileName] - getArgs
putStrLn (Parsing ++inpFileName++...)
let result = parseCSVFromFile inpFileName
print result
=== As a result I get:
No instance for (Show
On Fri, Jun 17, 2011 at 1:04 PM, Vincent Hanquez t...@snarc.org wrote:
On 06/17/2011 10:00 AM, Dmitri O.Kondratiev wrote:
Hi,
I try to parse csv file with Text.CSV, like this:
import Text.CSV
import System
main = do
[inpFileName] - getArgs
putStrLn (Parsing ++inpFileName
Hi,
What is right way to do conditional IO?
For example, I need to write to file errors only in case they exist,
otherwise my function should do nothing:
handleParseErrors errors
| (not . null) errors = writeFile parse-errors.txt (show errors)
| otherwise = ?
What should be an 'otherwise'
that eliminates the else case for
conditional IO:
http://hackage.haskell.org/packages/archive/base/latest/doc/html/Control-Monad.html#v:when
On Mon, Jun 20, 2011 at 4:00 PM, Dmitri O.Kondratiev doko...@gmail.com
wrote:
Hi,
What is right way to do conditional IO?
For example, I need to write to file
, this is better, then printing empty error list.
2011/6/17 Dmitri O.Kondratiev doko...@gmail.com
On Fri, Jun 17, 2011 at 1:04 PM, Vincent Hanquez t...@snarc.org wrote:
On 06/17/2011 10:00 AM, Dmitri O.Kondratiev wrote:
Hi,
I try to parse csv file with Text.CSV, like this:
import Text.CSV
Hi,
I am looking for an easy way to generate text reports.
For starters I need a very simple report that may contain:
- Some headers
- Lists of text strings where each string can include instances of basic
Haskell types. Each string should be printed on a separate line (terminated
with LF).
Do I
Hi,
I am looking for Haskell library to create graph diagrams in png or similar
formats.
Thanks!
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