.
Thanks and regards,
-Damodar Kulkarni
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On Thu, 12 Sep 2013, Tom Ellis wrote:
On Thu, Sep 12, 2013 at 09:21:20AM -0400, Scott Lawrence wrote:
Something's always bothered me about map and zipWith for ByteString. Why is it
map :: (Word8 -> Word8) -> ByteString -> ByteString
but
zipWith :: (Word8 -> Word8 -&
o each other with pack/unpack, and as I
understand it, the compiler performs sufficient optimizations so that there's
no performance hit to doing things like (pack $ zipWith xor a b), but it still
seems inconsistent. Is there a deep reason for this?
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Hello,
I think (and a quick reading of source seems to bear this out) that that only
happens when you run "cabal report". Which isn't quite undocumented - see
"cabal report --help".
On Wed, 1 May 2013, Ertugrul Söylemez wrote:
Hello there,
could somebody please shed some light on the follo
structures would
presumably encounter problems even if it worked for a list.
Ah well. As long as I'm not duplicating someone else's work, I'm more than
happy to go at this from scratch.
On Wed, 13 Mar 2013, Jeff Shaw wrote:
On 3/13/2013 12:15 AM, Scott Lawrence wrote:
Hey all,
uld be possible to build a cereal-like library that allows
proper lazy deserialization. Does it exist, and I've just missed it?
Thanks,
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GNU/Linux
f you intend to distribute your software on hackage. Running
"cabal init" will guide you through creating a stub cabal file, so it's not
too bad.
Best Regards.
On Fri, Dec 28, 2012 at 2:08 PM, Scott Lawrence wrote:
On Fri, 28 Dec 2012, xuan bach wrote:
Hi everyone,
On Fri, 28 Dec 2012, xuan bach wrote:
Hi everyone,
I'm a newbie in Haskell.
I'm wondering that if there is any tool support
creating Makefile for Haskell project like Ocamlbuild
for Ocaml project?
Since ghc handles dependencies automatically, I usually just do,
all:
g
os, and it avoids
dependency hell quite nicely. But I think there ought to be a better
solution.)
Janek
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27;s (and apache's) default format string - pretty
slow. If there's demand, I'll be happy to pay more attention to that.
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libs.html
but I don't see anything on how to switch this off.
- J.W.
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When running cabal install with --extra-lib-dirs=./lib, if a package is
found both in ~/.cabal/lib and ./lib, cabal seems to favor the
~/.cabal/lib one. Is there some way to specify the correct precedence to
use?
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Thanks all; I haven't quite gotten it to work, but I imagine I'll be
able to now (after reading up on ExistentialQuantification).
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t coming out of `filter` isn't related to the list going in in this
way, and shouldn't be re-paired with that list (or a direct derivative).
My goal, again, is to represent that distinction in the type system.
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r way
to accomplish this.
Hope that was clear, and thanks (as always) for the help (and being
awesome).
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No
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On 09/11/11 16:45, Alexander Solla wrote:
> Use "manyTill".
Ah, but of course. Thanks again!
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riterion was a single character, then I could use
noneOf or (satisfy . not), but that doesn't help here.
So... what am I missing?
Thanks in advance.
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String
> "*** Exception: Prelude.read: no parse
>
> Why?
>
> Michael
>
>
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uld have been fixed now, so you
>> should
>> try again.
>
> It's probably not fixed yet, since even last night build fails on
> opensolaris builder:
> http://darcs.haskell.org/ghcBuilder/builders/kgardas-opensolaris-x86-hea
that I did).
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On 06/09/2011 01:47 AM, Jason Dagit wrote:
> Have you checked this by looking at the generated assembly? I
> generated some assembly from GHC on windows. Here is what it looks
> ilke:
> http://hpaste.org/47610
>
> My assembly-fu is not strong enough to tell if it's using 64bit instructions.
>
I
ldy solution in case of more than 2 different models
(each, presumably, with their own subset of specializations).
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On 06/06/2011 03:13 AM, Scott Lawrence wrote:
>> I still don't know enough details about what you're doing,
>> > so my types are probably off. But I hope you get the idea.
> No, your types are right.
>
Or not.
type Model a = (Ord a)
On 06/06/2011 02:57 AM, Yitzchak Gale wrote:
> Generally, we don't start out with a type class. Type classes are
> great for the special situations in which they are needed (although
> you can do pretty well without them even then), but first
> let's get the basic concepts.
>
> Perhaps a model is
(Tree a)
On Mon, Jun 6, 2011 at 02:13, Scott Lawrence wrote:
> On Mon, Jun 6, 2011 at 01:52, Yitzchak Gale wrote:
>> Scott Lawrence wrote:
>> You almost never want to use UndecidableInstances
>> when writing practical programs in Haskell.
>
> Ah. That's what I wa
On Mon, Jun 6, 2011 at 01:52, Yitzchak Gale wrote:
> Scott Lawrence wrote:
> You almost never want to use UndecidableInstances
> when writing practical programs in Haskell.
Ah. That's what I wanted to know :P
(Although it does seem to me - from looking around docs and the sourc
GHC to handle nicely...)
[1] http://hackage.haskell.org/trac/haskell-prime/wiki/UndecidableInstances
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Apparently:
Prelude> let r = (fmap (1:) r) :: IO [Integer]
Prelude> fmap (take 5) r
*** Exception: stack overflow
Thanks - I'll just have to stay out of IO for this, then.
On Tue, May 31, 2011 at 17:05, Stephen Tetley wrote:
> 2011/5/31 Scott Lawrence :
>
>> Evalu
On 05/31/2011 04:48 PM, Artyom Kazak wrote:
>
> Oh, sorry. I was unclear. I have meant "assuming IO is lazy", as Yves
> wrote.
Ah, ok. That makes more sense.
>
> And saying "some hacks" I meant unsafeInterleaveIO, which lies beneath
> the laziness of, for example, getContents.
Which explains w
On 05/31/2011 04:20 PM, Artyom Kazak wrote:
> Suppose iRecurse looks like this:
> iRecurse = do
> x <- launchMissiles
> r <- iRecurse
> return 1
>
> As x is never needed, launchMissiles will never execute. It obviously is
> not what is needed.
Prelude> let launchMissiles = putStrLn
I was under the impression that operations performed in monads (in this
case, the IO monad) were lazy. (Certainly, every time I make the
opposite assumption, my code fails :P .) Which doesn't explain why the
following code fails to terminate:
iRecurse :: (Num a) => IO a
iRecurse = do
recur
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