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Today's Topics:
1. Getting Crypto package imported (Dustin Lee)
2. Re: Getting Crypto package imported (Kim-Ee Yeoh)
3. Re: Getting Crypto package imported (Dustin Lee)
4. Re: Getting Crypto package imported (Kim-Ee Yeoh)
5. problem with SDL-gfx (Mart?n Villagra)
6. Re: problem with SDL-gfx (Francesco Ariis)
7. how to write this function (Dennis Raddle)
----------------------------------------------------------------------
Message: 1
Date: Tue, 8 Dec 2015 07:55:51 -0700
From: Dustin Lee <[email protected]>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Subject: [Haskell-beginners] Getting Crypto package imported
Message-ID:
<CAN3sYc0=kzjhrdoicpavusupk9q9b2uwu3uuim-jvo+wclr...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
I used cabal to install Crypto and it seemed to work fine
Here is what I see at the prompt when I try to import the module
$ ghci
GHCi, version 7.4.1: http://www.haskell.org/ghc/ :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Prelude> :m +Crypto
<no location info>:
Could not find module `Crypto'
It is not a module in the current program, or in any known package.
Prelude> :m +Crypto.Hash
<no location info>:
Could not find module `Crypto.Hash'
It is not a module in the current program, or in any known package.
Prelude> :m +Crypto.Hash.Data
<no location info>:
Could not find module `Crypto.Data'
It is not a module in the current program, or in any known package.
Here is my package list.
$ ghc-pkg list
/var/lib/ghc/package.conf.d
Cabal-1.14.0
array-0.4.0.0
base-4.5.0.0
bin-package-db-0.0.0.0
binary-0.5.1.0
bytestring-0.9.2.1
containers-0.4.2.1
deepseq-1.3.0.0
directory-1.1.0.2
extensible-exceptions-0.1.1.4
filepath-1.3.0.0
ghc-7.4.1
ghc-prim-0.2.0.0
haskell2010-1.1.0.1
haskell98-2.0.0.1
hoopl-3.8.7.3
hpc-0.5.1.1
integer-gmp-0.4.0.0
old-locale-1.0.0.4
old-time-1.1.0.0
pretty-1.1.1.0
process-1.1.0.1
rts-1.0
template-haskell-2.7.0.0
time-1.4
unix-2.5.1.0
/home/dlee/.ghc/i386-linux-7.4.1/package.conf.d
Crypto-4.2.5.1
HUnit-1.3.0.0
QuickCheck-2.8.1
primitive-0.6.1.0
random-1.1
tf-random-0.5
transformers-0.4.3.0
I'd appreciate tips on how to troubleshoot what's going on.
--
Dustin Lee
qhfgva=rot13(dustin)
?( ? )?
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Message: 2
Date: Tue, 8 Dec 2015 22:10:30 +0700
From: Kim-Ee Yeoh <[email protected]>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Subject: Re: [Haskell-beginners] Getting Crypto package imported
Message-ID:
<capy+zdrhmxy_cxtdwfkmkjkoj6p5axuwjqh5qw--thaz9zt...@mail.gmail.com>
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On Tue, Dec 8, 2015 at 9:55 PM, Dustin Lee <[email protected]> wrote:
> Prelude> :m +Crypto
A glance at the main listing here:
https://hackage.haskell.org/package/Crypto
reveals that the module names are like
Data.Digest.MD5
Codec.Encryption.AES
So ":m +Data.Digest.MD5" should work.
-- Kim-Ee
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Message: 3
Date: Tue, 8 Dec 2015 08:33:58 -0700
From: Dustin Lee <[email protected]>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Subject: Re: [Haskell-beginners] Getting Crypto package imported
Message-ID:
<CAN3sYc1jkvHwH0sT0bX4Mv4vh6X4VbByWui5=ggziwr81d3...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Ugg... Thanks. I was following a tutorial that used different import
names. I guess either the names changed since then or I grabbed a
different package.
In any case, thanks!
On Tue, Dec 8, 2015 at 8:10 AM, Kim-Ee Yeoh <[email protected]> wrote:
>
> On Tue, Dec 8, 2015 at 9:55 PM, Dustin Lee <[email protected]> wrote:
>
>> Prelude> :m +Crypto
>
>
> A glance at the main listing here:
>
> https://hackage.haskell.org/package/Crypto
>
> reveals that the module names are like
>
> Data.Digest.MD5
> Codec.Encryption.AES
>
> So ":m +Data.Digest.MD5" should work.
>
> -- Kim-Ee
>
> _______________________________________________
> Beginners mailing list
> [email protected]
> http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners
>
>
--
Dustin Lee
qhfgva=rot13(dustin)
?( ? )?
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Message: 4
Date: Tue, 8 Dec 2015 22:42:46 +0700
From: Kim-Ee Yeoh <[email protected]>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Subject: Re: [Haskell-beginners] Getting Crypto package imported
Message-ID:
<capy+zdsydctz5jghn0+wa7gm7v2ybl960vzn9fs5na24_vo...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
On Tue, Dec 8, 2015 at 10:33 PM, Dustin Lee <[email protected]> wrote:
> I was following a tutorial that used different import names. I guess
> either the names changed since then or I grabbed a different package.
Is the tutorial on the web? Perhaps you could contact the author to update
it or add clarifying information?
-- Kim-Ee
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Message: 5
Date: Tue, 8 Dec 2015 12:44:18 -0300
From: Mart?n Villagra <[email protected]>
To: [email protected]
Subject: [Haskell-beginners] problem with SDL-gfx
Message-ID:
<cae7wea+iw27f8frs2ddrq4e7m5oxgmgn8ce8kgn1rvy7kc+...@mail.gmail.com>
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Hello!
I hope you can help me. I'm trying to use SDL-gfx but it seems it isn't
linking it correctly. When I try to run this simple file with runhaskell:
import Graphics.UI.SDL.Primitives
main = putStrLn "Hello"
It gives:
sdl.test.hs: <command line>: can't load .so/.DLL for:
/home/username/.cabal/lib/i386-linux-ghc-7.10.2/SDL-gfx-0.6.0.1-6rhSP5mw8M00K9S8yASTVF/
libHSSDL-gfx-0.6.0.1-6rhSP5mw8M00K9S8yASTVF-ghc7.10.2.so
(/home/username/.cabal/lib/i386-linux-ghc-7.10.2/SDL-gfx-0.6.0.1-6rhSP5mw8M00K9S8yASTVF/
libHSSDL-gfx-0.6.0.1-6rhSP5mw8M00K9S8yASTVF-ghc7.10.2.so: undefined symbol:
SDL_initFramerate)
Notes:
* SDL works fine in all cases.
* My system is i386, using Arch Linux. I tried with another computer with
x86_64 with Arch Linux and it worked.
* It works if I compile it with ghc and run the executable.
* I installed the package using cabal install SDL-gfx with no errors.
* I installed the library in the OS just in case, and double checked that
it exist in /usr/lib/libSDL_gfx.so and that it contains the symbol
SDL_initFramerate.
* The long *.so library reported by runhaskell also constains
SDL_initFramerate.
* GHCi gives the same error (when executing main).
* I'm trying to make a cabal package that uses this library, and cabal gave
the same error within the sandbox.
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Message: 6
Date: Tue, 8 Dec 2015 19:58:46 +0100
From: Francesco Ariis <[email protected]>
To: [email protected]
Subject: Re: [Haskell-beginners] problem with SDL-gfx
Message-ID: <[email protected]>
Content-Type: text/plain; charset=iso-8859-1
On Tue, Dec 08, 2015 at 12:44:18PM -0300, Mart?n Villagra wrote:
> Hello!
> I hope you can help me. I'm trying to use SDL-gfx but it seems it isn't
> linking it correctly. When I try to run this simple file with runhaskell:
> import Graphics.UI.SDL.Primitives
> main = putStrLn "Hello"
>
> It gives:
> sdl.test.hs: <command line>: can't load .so/.DLL for:
> [..]
Hello Mart?n, SDL-gfx maintainer here. Could you try:
runhaskell -L/usr/include/SDL/ -lSDL_gfx prova.hs
(this works in Debian, modify the -L dir appropriately if you are using
Arch).
------------------------------
Message: 7
Date: Tue, 8 Dec 2015 13:19:27 -0800
From: Dennis Raddle <[email protected]>
To: Haskell Beginners <[email protected]>
Subject: [Haskell-beginners] how to write this function
Message-ID:
<CAKxLvoo9yRvB-KeM84=wyjfhoybecjfdvqcibtukrnqzvcx...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
In my music translation program, I have a ton of data and configuration
that goes into every note computation, so I've decided to use the State
monad to pass it around. Also, the generated output is just a list of MIDI
events, so I think I'll use Writer to gather the output.
I will be dealing with several different MIDI synthesizers, which have
different specifications and manner of control. But there is enough in
common that I can write a single function to do the translation, provided
that I provide that function with some data that is specific to the synth,
and also I need to configure it with some functions specific to the synth.
Let's say my State/Writer type is called Tr.
type Tr a = StateT Configuration (Writer [MidiEvent]) a
This is the data I provide to StateT:
data Configuration = Configuration
{ t1 :: SynthSpecificData
, f1 :: Tr SynthSpecificComputationResult
, score :: WholeMusicalScore
}
So I need to write
translate :: Tr ()
computeMidiEvents = runWriter (runStateT translate theConfig)
So inside 'translate' I want to call 'f1' among many other things. Let's
just consider the f1 call first. I wrote this first:
translate = do
f <- gets f1
f
That works but looks a little weird. I think this works also:
translate = join (gets f1)
Is that better?
D
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