On 12 Sep 2012, at 16:04, Eric Velten de Melo wrote:
The behaviour I want to achieve is like this: I want the program when
compiled to read from a file, parsing the PGM and at the same time
apply transformations to the entries as they are read and write them
back to another PGM file.
Such
Subject: Re: [Haskell-cafe] Either Monad and Laziness
On 9/14/12 5:16 PM, Eric Velten de Melo wrote:
But now I'm kinda lost. Is there an easy way to explain the difference
between:
-iteratee
-conduit
-enumerator
I tend to group them into three families. 'iteratee' and 'enumerator
On 9/14/12 5:16 PM, Eric Velten de Melo wrote:
But now I'm kinda lost. Is there an easy way to explain the difference between:
-iteratee
-conduit
-enumerator
John Lato's iteratee library is the original one based on Oleg
Kiselyov's work. I've used it a fair deal and am quite fond of it.
On 13 September 2012 20:29, wren ng thornton w...@freegeek.org wrote:
On 9/12/12 5:37 PM, Francesco Mazzoli wrote:
At Wed, 12 Sep 2012 12:04:31 -0300,
Eric Velten de Melo wrote:
It would be really awesome, though, if it were possible to use a
parser written in Parsec with this, in the
On 9/12/12 5:37 PM, Francesco Mazzoli wrote:
At Wed, 12 Sep 2012 12:04:31 -0300,
Eric Velten de Melo wrote:
It would be really awesome, though, if it were possible to use a
parser written in Parsec with this, in the spirit of avoiding code
rewriting and enhancing expressivity and abstraction.
I am currently trying to rewrite the Graphics.Pgm library from hackage
to parse the PGM to a lazy array.
Laziness and IO really do not mix.
The problem is that even using a lazy array structure, because the
parser returns an Either structure it is only possible to know if the
parser was
Thanks for all the tips! The iteratees seem worth checking out. I'll
see what I can do and will report back if I come up with something.
Eric
On 12 September 2012 03:03, o...@okmij.org wrote:
I am currently trying to rewrite the Graphics.Pgm library from hackage
to parse the PGM to a lazy
On 12 September 2012 11:46, Eric Velten de Melo ericvm...@gmail.com wrote:
Thanks for all the tips! The iteratees seem worth checking out. I'll
see what I can do and will report back if I come up with something.
Eric
On 12 September 2012 03:03, o...@okmij.org wrote:
I am currently trying
At Wed, 12 Sep 2012 12:04:31 -0300,
Eric Velten de Melo wrote:
It would be really awesome, though, if it were possible to use a
parser written in Parsec with this, in the spirit of avoiding code
rewriting and enhancing expressivity and abstraction.
There is
Hello,
I am currently trying to rewrite the Graphics.Pgm library from hackage
to parse the PGM to a lazy array. The current implementation parses it
straight to UArray, which is strict.
The behaviour I want to achieve is like this: I want the program when
compiled to read from a file, parsing
On Tue, Sep 11, 2012 at 9:36 AM, Eric Velten de Melo
ericvm...@gmail.com wrote:
Any thoughts? Hopefully I'm not saying anything really stupid.
You can intersperse decoding errors in the output, e.g. output is
[Either Error DecodedChunk]. Then all the processors have to deal
with it, but if you
Use a tuple: (Result,Maybe Error) rather than an Either. Do everything
lazily, and in the case of an error, undo the result.
-- Původní zpráva --
Od: Eric Velten de Melo ericvm...@gmail.com
Datum: 11. 9. 2012
Předmět: [Haskell-cafe] Either Monad and Laziness
Hello,
I am
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