On Fri, Jun 11, 2010 at 3:34 PM, Luke Palmer lrpal...@gmail.com wrote:
Say, using System.Time.getClockTime.
Luke
On Thu, Jun 10, 2010 at 11:31 PM, Luke Palmer lrpal...@gmail.com wrote:
On Thu, Jun 10, 2010 at 11:50 AM, Andrew Coppin
andrewcop...@btinternet.com wrote:
Control.Concurrent
Hi.
This is probably I must be blind department
I have a very basic strip down echo cgi that runs with apache2.
When I try to modfi it to be a FastCGI instead and run it with spawn-fcgi
with nginx
It don't behave as expected.
I suppose that the line that don't get any data is mn - getInputFPS
Günther Schmidt wrote:
I'm just re-reading the book again, this time doing the exercises though :)
Is there a site with solutions for the exercises?
Unless you count the haskell-cafe and beginners mailing lists as sites,
I don't know any sites which have the solutions. ;)
Problem 3.3.3:
On Friday 11 June 2010 07:47:03, Martin Drautzburg wrote:
On Friday, 11. June 2010 00:12:03 Daniel Fischer wrote:
Thanks Daniel.
Upgrade. We're at 6.12 now!
Did that. Everything is available now.
I am still having trouble with the test function. First it seems I need
braces, so I can
On Thu, Jun 10, 2010 at 2:10 PM, Maciej Piechotka uzytkown...@gmail.com wrote:
data Named a = Named String a
instance Functor Named where
f `fmap` (Named s v) = Named s (f v)
instance Applicative Named where
pure x = Named x
(Named s f) * (Named t v) = Named (s ++ ( ++ t ++ )) (f
* David Powell da...@drp.id.au [2010-06-11 16:09:55+1000]
This is a slightly different issue, but isn't there a potential problem with
threadDelay? I noticed that internally threadDelay uses gettimeofday() as
the absolute time source (on linux at least). Isn't there potential
problem with
* Günther Schmidt gue.schm...@web.de [2010-06-11 01:22:27+0200]
there is nothing wrong with ifs as such except the won't actually
exit a long piece of code, the computation will continue, just in a
useless way.
Can you clarify?
--
Roman I. Cheplyaka :: http://ro-che.info/
Don't let school
On Friday 11 June 2010 11:50:55, Luke Palmer wrote:
On Thu, Jun 10, 2010 at 2:10 PM, Maciej Piechotka uzytkown...@gmail.com
wrote:
data Named a = Named String a
instance Functor Named where
f `fmap` (Named s v) = Named s (f v)
instance Applicative Named where
pure x = Named
On Tue, 8 Jun 2010, Don Stewart wrote:
Great points: I've added them to this wiki page of for and against
points:
http://haskell.org/haskellwiki/Libraries/WhenToRewriteOrRename
Please add points as you see fit, and maybe we can come up with a
mitigation/change plan.
Closely related is
Henning Thielemann lemm...@henning-thielemann.de writes:
Closely related is the question of module
names. 'transformers'+'monads-fd' are somehow an successor of 'mtl'
and chose distinct package names, but there were module name
clashes. They mostly hurted GHCi users, but this led to a lot of
On Mon, Jun 7, 2010 at 9:49 PM, Claus Reinke claus.rei...@talk21.com wrote:
As others have pointed out, you can't go from operation to representation,
but you can pair operations and expressions with their representations.
This idea is also implemented in my little 'repr' package:
On Fri, Jun 11, 2010 at 12:46 AM, Felipe Lessa felipe.le...@gmail.com wrote:
eqTypeable :: (Typeable a, Eq a, Typeable b, Eq b) = a - b - Bool
eqTypeable x y = case cast y of
Just y' - x == y'
Nothing - False
...or indeed:
eqTypeable x y = cast x
On 11 June 2010 10:12, Roman Cheplyaka r...@ro-che.info wrote:
* Günther Schmidt gue.schm...@web.de [2010-06-11 01:22:27+0200]
there is nothing wrong with ifs as such except the won't actually
exit a long piece of code, the computation will continue, just in a
useless way.
Can you clarify?
Hello Christopher,
Friday, June 11, 2010, 4:06:05 PM, you wrote:
do if x
then return ()
else do bar; continueComputation
i format it this way:
if x then return () else do
bar
continueComputation
--
Best regards,
Bulat
On 11 June 2010 14:27, Bulat Ziganshin bulat.zigans...@gmail.com wrote:
i format it this way:
if x then return () else do
bar
continueComputation
That's a nice way of formatting! God bless optional formatting! I like
this problem-specific indentation. Another is:
if xthen foo
else
Hello Christopher,
Friday, June 11, 2010, 4:35:00 PM, you wrote:
if xthen foo
else if y then bar
else if z then mu
else zot
case () of
_ | x - foo
| y - bar
| otherwise - zor
it's usually considered as haskell way of doing this
--
Best regards,
Bulat
I don't know whether its a good name or not (the ===), but I have the
following in a generic utilities file I have, and I use it every now and
then.
(===) :: (Typeable a, Typeable b, Eq b) = a - b - Bool
(===) x y = cast x == Just y
(Notice you don't need Eq a in the context)
On 11 June 2010
(moving to the cafe)
There is an incompatibility between the version of iconv in Mac Os and
the one included in MacPorts.
As the RTS of the build of ghc in the Haskell Platform is linked
against Mac Os iconv, you cannot use it with the build of gtk2hs from
MacPorts.
This is a known issue already
On 11 June 2010 14:40, Bulat Ziganshin bulat.zigans...@gmail.com wrote:
if x then foo
else if y then bar
else if z then mu
else zot
case () of
_ | x - foo
| y - bar
| otherwise - zor
it's usually considered as haskell way of doing this
The example is merely to
There are a lot of issues with string encoding type mismatches.
Especially automatic conversions. This mailing list gets enough
posts about encoding confusions.
Would it make sense to make the string depend on its encoding type?
E.g. a String UTF16 cannot be used with putStrLn :: String UTF8, it
On Fri, Jun 11, 2010 at 04:17:25PM +0200, Christopher Done wrote:
There are a lot of issues with string encoding type mismatches.
Especially automatic conversions. This mailing list gets enough
posts about encoding confusions.
Would it make sense to make the string depend on its encoding
On Fri, 11 Jun 2010, Ben Millwood wrote:
On Fri, Jun 11, 2010 at 2:52 PM, Henning Thielemann
lemm...@henning-thielemann.de wrote:
I'm uncertain whether fgl conforms to the package versioning policy, but
if it does, then changes in its Cabal file should not bother sifflet.
Thus upper bound
Hi,
I've been working on a (de)serialization package from/to XML (using
SYB) and wondering if anyone feels like giving me a quick code review
before I upload it to hackagedb.
The source code can be found at http://github.com/finnsson/Text.XML.Generic
It is *heavily* inspired by
On Thu, 2010-06-10 at 21:21 +0100, Ben Millwood wrote:
On Thu, Jun 10, 2010 at 8:57 PM, Maciej Piechotka uzytkown...@gmail.com
wrote:
Error monad seems not to be a semantic solution as we exit on success
not failure.
Which is really why the Either monad should not necessarily have
--- On Thu, 6/10/10, Louis Wasserman wasserman.lo...@gmail.com wrote:
Date: Thursday, June 10, 2010, 1:32 AM
Yeah, Control.Parallel would be nice to have. Heck, ideally I could get
the whole Haskell Platform, which would be a reasonable comparison to
the huge Java and C++ libraries
Thanks all, it works fine (see below).
I lamentably try to make the same for show:
showTypeable :: (Typeable a) = a - String
showTypeable x = case cast x of
Just x' - show x'
Nothing -
Because it really upsets me to add this show constraints to the
On Sat, Jun 12, 2010 at 12:13:14AM +0200, Dupont Corentin wrote:
Thanks all, it works fine (see below).
I lamentably try to make the same for show:
showTypeable :: (Typeable a) = a - String
showTypeable x = case cast x of
Just x' - show x'
On Friday, June 11, 2010, Felipe Lessa felipe.le...@gmail.com wrote:
On Sat, Jun 12, 2010 at 12:13:14AM +0200, Dupont Corentin wrote:
Thanks all, it works fine (see below).
I lamentably try to make the same for show:
showTypeable :: (Typeable a) = a - String
showTypeable x = case cast x of
On Fri, Jun 11, 2010 at 08:12:43PM -0500, Antoine Latter wrote:
1) Which extensions are required to make the code compile.
OverlappingInstances (of course), and IncoherrentInstances, since
neither instance is more specific than the other.
Well, I guess it can't be compiled at all :(
$
--- On Wed, 6/9/10, Don Stewart d...@galois.com wrote:
-snip-
Now how do we get those regex-dna and binary-trees
programs to compile?
http://shootout.alioth.debian.org/u32/measurements.php?lang=ghc
binary-trees:
Could not find module
`Control.Parallel.Strategies':
igouy2:
parallel, regex-posix, regex-pcre are now installed and the current
compile errors are caused by the programs not the absence of required
libraries -
http://shootout.alioth.debian.org/u64q/program.php?test=binarytreeslang=ghcid=2#log
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