One hint that is not (at least to my knowledge) listed on haskell.org is that,
according to at least one user (see "The Programmers’ Stone » Blog Archive » A
First Haskell Experience" at
http://the-programmers-stone.com/2008/03/04/a-first-haskell-experience/), the
online tutorials can "confuse
Thanks both for the the explanation and the link. The wikibook is really
growing fast!
Abhay
On Wed, May 7, 2008 at 5:05 PM, apfelmus <[EMAIL PROTECTED]> wrote:
> Abhay Parvate wrote:
>
> > Just for curiocity, is there a practically useful computation that uses
> > 'seq' in an essential manner,
"Richard A. O'Keefe" <[EMAIL PROTECTED]> writes:
> According to the ASCII standard, it was fully legitimate to use
> backspace and carriage return to get over-striking (which is why ASCII
> includes oddities such as ^ and ` : they really are for accents, and ,
> did double duty as cedilla, ' as ac
Thanks..
On Thu, May 8, 2008 at 10:26 AM, Don Stewart <[EMAIL PROTECTED]> wrote:
> bhargava.ambrish:
> >Hi,
> >
> >I want to know, how can see old threads (may be I can get my answers
> from
> >there itself)?
> >
>
> You can search the list here:
>
>http://dir.gmane.org/gmane.comp
bhargava.ambrish:
>Hi,
>
>I want to know, how can see old threads (may be I can get my answers from
>there itself)?
>
You can search the list here:
http://dir.gmane.org/gmane.comp.lang.haskell.cafe
And find more information about all the lists and other resources at:
http:
On Thu, 2008-05-08 at 10:07 +0530, Ambrish Bhargava wrote:
> Hi All,
>
> I am new to Haskell. Can anyone guide me how can I start on it (Like
> getting binaries, some tutorials)?
All of this is on haskell.org.
I'm kind of curious how you know about this mailing list without going
to haskell.org
Hi,
I want to know, how can see old threads (may be I can get my answers from
there itself)?
--
Regards,
Ambrish Bhargava
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Hi All,
I am new to Haskell. Can anyone guide me how can I start on it (Like getting
binaries, some tutorials)?
Thanks in advance.
--
Regards,
Ambrish Bhargava
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An interesting critique of OCaml.
http://enfranchisedmind.com/blog/2008/05/07/why-ocaml-sucks/
One phrase that stood out, regarding GHC's support for deforestation
transformations like build/foldr and stream fusion:
"Haskell is doing data structure level optimizations with the ease
that mo
Windows:end of line is \r\n
Unix: end of line is \n
BUT, these days Windows programs have to deal with text files written
on Unix,
and Unix programs have to deal with text files written on Windows,
especially
when mounting networked file systems using things like NFS and Samb
PR Stanley <[EMAIL PROTECTED]> wrote:
> Hi
> One of you chaps mentioned the Nat data type
> data Nat = Zero | Succ Nat
>
> Let's have
> add :: Nat -> Nat -> Nat
> add Zero n = n
> add (Succ m)n = Succ (add m n)
>
> Prove
> add m Zero = m
>
> I'm on the verge of giving up on this. :-(
>
The imp
So, when you apply the function to the first element in the set -
e.g. Zero or Nil in the case of lists - you're actually testing to
see the function works. Then in the inductive step you base
everything on the assumption that p holds for some n and of course if
that's true then p must hold for
Paul,
Sometimes it helps to go exhaustively through every detail to be sure
there is no magic going on. Proceed only if you want exhaustive detail...
If it seems that people are skipping some steps in their argument, it is
because they are! They already understand it so well that they forgot
On Thu, 2008-05-08 at 00:12 +0200, Harri Kiiskinen wrote:
> Thank You all for the lively discussion, and of course, a nice and
> simple answer to my problem:
>
> On Wed, 2008-05-07 at 21:17 +0100, Duncan Coutts wrote:
> > (inh,outh,errh,pid) <- runInteractiveProcess path args Nothing Nothing
> >
2008/5/7 Galchin, Vasili <[EMAIL PROTECTED]>:
> Hello,
>
> I am trying to find the definition for the data type
> "TimeSpec"/"CTimeSpec".
http://www.haskell.org/ghc/docs/latest/html/libraries/unix/src/System-Posix-Unistd.html
Doesn't look like it's exported from anywhere, just used internall
Thank You all for the lively discussion, and of course, a nice and
simple answer to my problem:
On Wed, 2008-05-07 at 21:17 +0100, Duncan Coutts wrote:
> (inh,outh,errh,pid) <- runInteractiveProcess path args Nothing Nothing
> -- We want to process the output as text.
> hSetBinaryMode outh False
On Wed, May 7, 2008 at 9:27 PM, PR Stanley <[EMAIL PROTECTED]> wrote:
> Hi
> One of you chaps mentioned the Nat data type
>
> data Nat = Zero | Succ Nat
>
> Let's have
> add :: Nat -> Nat -> Nat
> add Zero n = n
> add (Succ m)n = Succ (add m n)
>
> Prove
> add m Zero = m
To prove this by i
PR Stanley wrote:
add Zero n = n
So this function takes the left argument, and replaces Zero with n. Well
if n = Zero, this clearly leaves the left argument unchanged...
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Am Mittwoch, 7. Mai 2008 23:27 schrieb PR Stanley:
> Hi
> One of you chaps mentioned the Nat data type
> data Nat = Zero | Succ Nat
>
> Let's have
> add :: Nat -> Nat -> Nat
> add Zero n = n
> add (Succ m) n = Succ (add m n)
>
> Prove
> add m Zero = m
>
> I'm on the verge of giving up on this. :-(
Hello Mads,
Thursday, May 8, 2008, 1:24:05 AM, you wrote:
> also because TH is difficult. At least TH was difficult for me. It might
> just be because I have never worked with anything like TH before (have
no, TH is dificult by itself. if you have spare time - read about
metalua, which implement
Hi
One of you chaps mentioned the Nat data type
data Nat = Zero | Succ Nat
Let's have
add :: Nat -> Nat -> Nat
add Zero n = n
add (Succ m)n = Succ (add m n)
Prove
add m Zero = m
I'm on the verge of giving up on this. :-(
Cheers
Paul
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Hi Wouter
Wouter Swierstra wrote:
> Here's a concrete example. Suppose you have a query q that, when
> performed, will return a table storing integers. I can see how you can
> ask the SQL server for the type of the query, parse the response, and
> compute the Haskell type "[Int]". I'm not su
On Wed, May 07, 2008 at 09:24:46PM +0100, Duncan Coutts wrote:
> On Wed, 2008-05-07 at 08:46 -0700, David Roundy wrote:
> > On Wed, May 07, 2008 at 08:33:23AM -0700, Bryan O'Sullivan wrote:
> > > David Roundy wrote:
> > > > This is the correct behavior (although it's debatable whether kpsewhich
> >
On Wed, 2008-05-07 at 08:46 -0700, David Roundy wrote:
> On Wed, May 07, 2008 at 08:33:23AM -0700, Bryan O'Sullivan wrote:
> > David Roundy wrote:
> > > This is the correct behavior (although it's debatable whether kpsewhich
> > > should be outputting in text mode).
> >
> > I think it would be mo
On Wed, 2008-05-07 at 10:20 -0700, Jason Dusek wrote:
> If, on the other hand, we just give in to Windows, then some
> things are good and some are bad. First of all, if hGetLine
> has Windows behaviour on Windows and Unix behaviour on Unix,
> then any data files shipped with Cabal packag
On Wed, 2008-05-07 at 08:33 -0700, Bryan O'Sullivan wrote:
> David Roundy wrote:
>
> > This is the correct behavior (although it's debatable whether kpsewhich
> > should be outputting in text mode).
>
> I think it would be more accurate to say that runInteractiveProcess has
> an inadequate API,
Wouter Swierstra wrote:
Please consider writing something for the next issue of The Monad.Reader.
You know, I'm actually tempted to do just that...
It doesn't matter if you're a respected researcher or if you have only
just started learning Haskell, get your thoughts together and write an
ar
David Roundy wrote:
"\r\n" as newline should die a rapid death... windows is hard enough
without maintaining this sort of stupidity.
Windows *does* do a number of very silly things. However, Windows isn't
going away any time soon. And personally, I'd prefer it if we could make
it easier to
David Roundy <[EMAIL PROTECTED]> wrote:
> ...when in text mode on DOS-descended systems, the
> character sequence "\r\n" is converted to "\n" by the operating
> system.
So basically, Windows supports both the "\n" convention and
the "\r\n" convention by making a distinction between "text"
an
On Wed, May 7, 2008 at 7:47 AM, Jules Bean <[EMAIL PROTECTED]> wrote:
> Alfonso Acosta wrote:
>
> > It would certainly be difficult map any Haskell type to VHDL, so, by
> > now we would be content to map enumerate algebraic types (i.e.
> > algebraic types whose all data constructors have arity zer
On Wed, May 7, 2008 at 9:12 AM, Donn Cave <[EMAIL PROTECTED]> wrote:
> Doesn't hGetLine imply text mode? What does "Line" mean, otherwise?
On normal operating systems, "line" means until you reach a '\n'
character. In fact, that's also what it means when reading in text
mode, it's just that whe
On May 7, 2008, at 8:46 AM, David Roundy wrote:
On Wed, May 07, 2008 at 08:33:23AM -0700, Bryan O'Sullivan wrote:
David Roundy wrote:
This is the correct behavior (although it's debatable whether
kpsewhich
should be outputting in text mode).
I think it would be more accurate to say that
On Wed, May 07, 2008 at 07:48:45PM +0400, Bulat Ziganshin wrote:
> Hello David,
Hi Bulat!
> Wednesday, May 7, 2008, 7:46:11 PM, you wrote:
> > I don't see any reason to support text mode. It's easy to filter by hand
> > if you absolutely have to deal with ugly applications on ugly platforms.
>
Hello David,
Wednesday, May 7, 2008, 7:46:11 PM, you wrote:
> I don't see any reason to support text mode. It's easy to filter by hand
> if you absolutely have to deal with ugly applications on ugly platforms.
you mean unix, of course? ;)
--
Best regards,
Bulatma
On Wed, May 07, 2008 at 08:33:23AM -0700, Bryan O'Sullivan wrote:
> David Roundy wrote:
> > This is the correct behavior (although it's debatable whether kpsewhich
> > should be outputting in text mode).
>
> I think it would be more accurate to say that runInteractiveProcess has
> an inadequate AP
David Roundy wrote:
> This is the correct behavior (although it's debatable whether kpsewhich
> should be outputting in text mode).
I think it would be more accurate to say that runInteractiveProcess has
an inadequate API, since you can't indicate whether the interaction with
the other process sh
On Wed, May 07, 2008 at 04:42:45PM +0200, Harri Kiiskinen wrote:
> Prelude System.Process System.IO> (inp,outp,err,ph) <-
> runInteractiveProcess "kpsewhich" ["testfile.txt"] Nothing
> Nothing
...
> Prelude System.Process System.IO> hGetLine outp
>
> which gives me:
>
> "./tes
2008/5/6 Galchin, Vasili <[EMAIL PROTECTED]>:
> 2) http://hackage.haskell.org/packages/upload.html
>
> - do I have to set up my .cabal in a special way to run "dist"?
I believe it works automatically, using the values of the fields you
set, e.g. Exposed-modules and Other-
Hello all,
I bumped into a "feature" which might be a bug, but to be certain, I'd
like to hear your opinion. I'm running ghc 6.8.2 on Windows XP, and with
ghci I do the following:
Prelude System.Process System.IO> (inp,outp,err,ph) <-
runInteractiveProcess "kpsewhich" ["testfile.txt"] Not
Abhay Parvate wrote:
Just for curiocity, is there a practically useful computation that uses
'seq' in an essential manner, i.e. apart from the efficiency reasons?
I don't think so because you can always replace seq with const id .
In fact, doing so will get you "more" results, i.e. a computa
Just for curiocity, is there a practically useful computation that uses
'seq' in an essential manner, i.e. apart from the efficiency reasons?
Abhay
On Wed, May 7, 2008 at 2:48 PM, apfelmus <[EMAIL PROTECTED]> wrote:
> Luke Palmer wrote:
>
> > It seems that there is a culture developing where peo
Call for Copy
The Monad.Reader - Issue 11
Please consider writing something for the next issue of The
Monad.Reader. The deadline for Issue 11 is
** August 1, 2008 **
It doesn't matter if you're a respected researcher or if you have o
Daniel Fischer ha scritto:
Am Dienstag, 6. Mai 2008 22:40 schrieb patrik osgnach:
Brent Yorgey ha scritto:
On Tue, May 6, 2008 at 8:20 AM, patrik osgnach <[EMAIL PROTECTED]>
wrote:
Hi. I'm learning haskell but i'm stuck on a generic tree folding
exercise. i must write a function of this type
Luke Palmer wrote:
It seems that there is a culture developing where people intentionally
ignore the existence of seq when reasoning about Haskell. Indeed I've
heard many people argue that it shouldn't be in the language as it is
now, that instead it should be a typeclass.
I wonder if it's poss
Hello,
I am trying to find the definition for the data type
"TimeSpec"/"CTimeSpec".
thanks, Vasili
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