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Today's Topics:
1. Compiling afrob from Yampa (Nathan Huesken)
2. Re: Compiling afrob from Yampa (Daniel Fischer)
3. one element tuple (bitur mail)
4. Re: one element tuple (Daniel Fischer)
5. hPutChar: invalid argument (Invalid or incomplete multibyte
or wide character (Erik de Castro Lopo)
6. Re: hPutChar: invalid argument (Invalid or incomplete
multibyte or wide character (Daniel Fischer)
----------------------------------------------------------------------
Message: 1
Date: Sat, 12 Jun 2010 15:11:37 -0400
From: Nathan Huesken <hask...@lonely-star.org>
Subject: [Haskell-beginners] Compiling afrob from Yampa
To: Biginners Haskell Mailinglist <beginners@haskell.org>
Message-ID: <20100612151137.69915...@samzwo>
Content-Type: text/plain; charset=US-ASCII
Hi,
I am trying to learn yampa and downloaded the package, also containing
afrob from the homepage. I installed arrows and HGL over cabal.
Now I go into the afrob directory and type make, I get:
make -C src
make[1]: Entering directory `/home/ls/tmp/Yampa-0.9.1/afrob-0.2/src'
make -C Common
make[2]: Entering directory
`/home/ls/tmp/Yampa-0.9.1/afrob-0.2/src/Common' ghc -M -optdep-f
-optdep.hs_dependences
-optdep--exclude-directory=/usr/local/lib/ghc/imports/arrow:/usr/local/lib/ghc/imports/afrp
-fglasgow-exts -O -package lang
-i/usr/local/lib/ghc/imports/arrow:/usr/local/lib/ghc/imports/afrp
AFrob.hs AFrobDiagnostics.hs AFrobPhysicalDimensions.hs AFrobRobotIO.hs
AFrobRobotSimFake.hs || (rm -f .hs_dependences ;
exit 1)
on the commandline:
Warning: -optdep-f is deprecated: Use -dep-makefile instead
<command line>: unknown package: lang
ghc -c -fglasgow-exts -O -package lang
-i/usr/local/lib/ghc/imports/arrow:/usr/local/lib/ghc/imports/afrp -o
AFrob.o AFrob.hs <command line>: unknown package: lang make[2]: ***
[AFrob.o] Error 1 make[2]: Leaving directory
`/home/ls/tmp/Yampa-0.9.1/afrob-0.2/src/Common' make[1]: *** [Common]
Error 2 make[1]: Leaving directory
`/home/ls/tmp/Yampa-0.9.1/afrob-0.2/src' make: *** [src] Error 2
So I suppose I am missing the "lang" package ?!? How do I get it?
Thanks!
Nathan
------------------------------
Message: 2
Date: Sat, 12 Jun 2010 21:42:47 +0200
From: Daniel Fischer <daniel.is.fisc...@web.de>
Subject: Re: [Haskell-beginners] Compiling afrob from Yampa
To: beginners@haskell.org
Message-ID: <201006122142.48078.daniel.is.fisc...@web.de>
Content-Type: text/plain; charset="iso-8859-1"
On Saturday 12 June 2010 21:11:37, Nathan Huesken wrote:
> Hi,
>
> I am trying to learn yampa and downloaded the package, also containing
> afrob from the homepage. I installed arrows and HGL over cabal.
I think you should have installed Yampa via cabal, too,
cabal install Yampa
would've gotten you Yampa-0.9.2.3
> Now I go into the afrob directory and type make, I get:
>
> make -C src
> make[1]: Entering directory `/home/ls/tmp/Yampa-0.9.1/afrob-0.2/src'
> make -C Common
> make[2]: Entering directory
> `/home/ls/tmp/Yampa-0.9.1/afrob-0.2/src/Common' ghc -M -optdep-f
> -optdep.hs_dependences
> -optdep--exclude-directory=/usr/local/lib/ghc/imports/arrow:/usr/local/l
>ib/ghc/imports/afrp -fglasgow-exts -O -package lang
> -i/usr/local/lib/ghc/imports/arrow:/usr/local/lib/ghc/imports/afrp
> AFrob.hs AFrobDiagnostics.hs AFrobPhysicalDimensions.hs AFrobRobotIO.hs
> AFrobRobotSimFake.hs || (rm -f .hs_dependences ;
> exit 1)
>
> on the commandline:
> Warning: -optdep-f is deprecated: Use -dep-makefile instead
> <command line>: unknown package: lang
> ghc -c -fglasgow-exts -O -package lang
> -i/usr/local/lib/ghc/imports/arrow:/usr/local/lib/ghc/imports/afrp -o
> AFrob.o AFrob.hs <command line>: unknown package: lang make[2]: ***
> [AFrob.o] Error 1 make[2]: Leaving directory
> `/home/ls/tmp/Yampa-0.9.1/afrob-0.2/src/Common' make[1]: *** [Common]
> Error 2 make[1]: Leaving directory
> `/home/ls/tmp/Yampa-0.9.1/afrob-0.2/src' make: *** [src] Error 2
>
> So I suppose I am missing the "lang" package ?!? How do I get it?
I think maybe "lang" was a package way back in ancient times.
>From a short look at the imports in afrob, it might be what now is
haskell98.
Considering the homepage says "Version 0.9.1 is a minor update of 0.9,
including a version of HGL that should compile with GHC 5.04.1"
I don't think it will be very easy to get it going now, too many API
changes in the meantime.
It also mentions the package concurrent, which doesn't exist either.
You can try making it work by removing explicit packages from the ghc-
invocations in the makefiles and adding the --make flag
>
> Thanks!
> Nathan
------------------------------
Message: 3
Date: Sat, 12 Jun 2010 16:09:48 -0400
From: bitur mail <biturm...@gmail.com>
Subject: [Haskell-beginners] one element tuple
To: beginners@haskell.org
Message-ID:
<aanlktinxinchejbna1mo7iwzsqpoloft9xk_pthqk...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hello,
This is a dumb question but ...
I'm just starting with the book Real World Haskell, and in chapter 2 it
mentions that "Haskell doesn't have a notion of a one-element tuple".
I am confused by this because I type, for example, (143), into the
interpreter and it does not complain. What does Haskell consider (143) to
be?
Thanks :)
DG
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Message: 4
Date: Sat, 12 Jun 2010 22:23:24 +0200
From: Daniel Fischer <daniel.is.fisc...@web.de>
Subject: Re: [Haskell-beginners] one element tuple
To: beginners@haskell.org
Message-ID: <201006122223.30882.daniel.is.fisc...@web.de>
Content-Type: text/plain; charset="utf-8"
On Saturday 12 June 2010 22:09:48, bitur mail wrote:
> Hello,
>
> This is a dumb question but ...
>
> I'm just starting with the book Real World Haskell, and in chapter 2 it
> mentions that "Haskell doesn't have a notion of a one-element tuple".
>
> I am confused by this because I type, for example, (143), into the
> interpreter and it does not complain. What does Haskell consider (143)
> to be?
An ordinary value, enclosed in parentheses.
Prelude> :t (143)
(143) :: (Num t) => t
Prelude> (143) == 143
True
That's different to e.g. Python:
>>> x = (3,)
>>> len(x)
1
>>> type(x)
<type 'tuple'>
>>> x == 3
False
which has a notion of 1-tuples having a type different from the type of
their components.
>
> Thanks :)
> DG
------------------------------
Message: 5
Date: Sun, 13 Jun 2010 16:00:15 +1000
From: Erik de Castro Lopo <mle...@mega-nerd.com>
Subject: [Haskell-beginners] hPutChar: invalid argument (Invalid or
incomplete multibyte or wide character
To: beginners@haskell.org
Message-ID: <20100613160015.44aebdbe.mle...@mega-nerd.com>
Content-Type: text/plain; charset=US-ASCII
HI all,
I've managed to use the Curl bindings to pull down a web page, and I'm
using TagSoup to parse it, but when I try to print the text in a TagText
I get
hPutChar: invalid argument (Invalid or incomplete multibyte or wide
character)
The code looks like:
parsePage :: String -> IO ()
parsePage page = do
let tags = map deTag $ filter isTagText $ parseTags page
mapM_ putStrLn tags
where
deTag (TagText s) = s
deTag x = error $ "Bad Tag '" ++ show x ++ "' in deTag."
This is with ghc-6.12.1 on Debian Linux.
Any clues appreciated.
Cheers,
Erik
--
----------------------------------------------------------------------
Erik de Castro Lopo
http://www.mega-nerd.com/
------------------------------
Message: 6
Date: Sun, 13 Jun 2010 13:07:03 +0200
From: Daniel Fischer <daniel.is.fisc...@web.de>
Subject: Re: [Haskell-beginners] hPutChar: invalid argument (Invalid
or incomplete multibyte or wide character
To: beginners@haskell.org
Message-ID: <201006131307.04366.daniel.is.fisc...@web.de>
Content-Type: text/plain; charset="iso-8859-1"
On Sunday 13 June 2010 08:00:15, Erik de Castro Lopo wrote:
> HI all,
>
> I've managed to use the Curl bindings to pull down a web page, and I'm
> using TagSoup to parse it, but when I try to print the text in a TagText
> I get
>
> hPutChar: invalid argument (Invalid or incomplete multibyte or wide
> character)
>
> The code looks like:
>
> parsePage :: String -> IO ()
> parsePage page = do
> let tags = map deTag $ filter isTagText $ parseTags page
> mapM_ putStrLn tags
> where
> deTag (TagText s) = s
> deTag x = error $ "Bad Tag '" ++ show x ++ "' in deTag."
>
>
> This is with ghc-6.12.1 on Debian Linux.
>
> Any clues appreciated.
>
> Cheers,
> Erik
Probably the page you've tried it on wasn't encoded in your locale
encoding. If the page was in latin1 and your locale is UTF-8, there will
likely be invalid (for UTF-8) byte sequences in it.
For a locally stored page, the code above worked fine with tagsoup-0.6 and
tagsoup-0.10 when the page was utf-8-encoded, but if it was latin1-encoded
(and contained non-ASCII chars), it raised an
invalid argument (Invalid or incomplete multibyte or wide character)
error (on hGetContents, though, I suppose that's because I used readFile
and not th Curl-bindings).
------------------------------
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