On Fri, Dec 5, 2008 at 2:08 PM, Judah Jacobson [EMAIL PROTECTED]wrote:
On Fri, Dec 5, 2008 at 1:10 PM, Martijn van Steenbergen
[EMAIL PROTECTED] wrote:
Hello,
This week I upgraded to GHC 6.10 using the .pkg installer. It installed
without a single hiccup -- thanks!
I've noticed two
2008/11/12 Lyle Kopnicky [EMAIL PROTECTED]
Hi folks,
I had some code using the oldtime package, and want to convert it to use
the time package.
One of the things I need to do is calculate the number of seconds since
midnight. The easy part is getting a TimeDiff result:
utc -
On Fri, Oct 17, 2008 at 9:26 AM, Achim Schneider [EMAIL PROTECTED] wrote:
[d| ... |], where the ... is a list of top-level declarations; the
quotation has type Q [Dec].
(
http://www.haskell.org/ghc/docs/latest/html/users_guide/template-haskell.html
)
Can someone elaborate on what a list
On Tue, Sep 16, 2008 at 7:30 AM, Mauricio [EMAIL PROTECTED] wrote:
Hi,
I would like to write a Haskell pretty-printer,
using standard libraries for that. How can I
check if the original and the pretty-printed
versions are the same? For instance, is there
a file generated by GHC at the
On Tue, Sep 2, 2008 at 5:33 PM, Ryan Ingram [EMAIL PROTECTED] wrote:
ghci has some crazy defaulting rules for expressions at the top level.
In particular, it tries to unify those expressions with a few
different types, including IO.
On the other hand, the let-expression is typed like
On Fri, Aug 29, 2008 at 6:41 AM, Maurício [EMAIL PROTECTED] wrote:
Hi,
http://haskell.org/haskellwiki/Keywords says that:
-
[do is a] syntactic sugar for use with monadic
expressions. For example:
do { x ; result - y ; foo result }
is shorthand for:
x y = \result -
On Fri, Aug 29, 2008 at 8:50 AM, David House [EMAIL PROTECTED] wrote:
2008/8/29 Philip Weaver [EMAIL PROTECTED]:
It sounds like you tried to redefine () and (=) and make 'do' use the
new definitions. This is not possible, regardless of what types you give
() and (=).
Watch out
On Fri, Aug 29, 2008 at 1:59 PM, Roman Cheplyaka [EMAIL PROTECTED] wrote:
* Johannes Waldmann [EMAIL PROTECTED] [2008-08-29
15:39:15+0200]
data Test = Test Integer {b::String}
positional (= unnamed) record notation is a language design error :-)
and its use should be discouraged. -
On Wed, Aug 27, 2008 at 5:40 AM, Andrew U. Frank [EMAIL PROTECTED]
wrote:
i use System.POSIX.IO to run a process and access the handles (after due
transformation) to get the values back.
this solution is unfortunately not portable and works only on unix (or
cygwin) but not for plain windows.
On Tue, Jul 29, 2008 at 3:14 AM, Malcolm Wallace
[EMAIL PROTECTED] wrote:
Philip Weaver [EMAIL PROTECTED] wrote:
I'm trying to use CPP-defined strings in a Haskell module, like this:
main :: IO ()
main = putStrLn FOO
This of course will not work:
ghc -DFOO=hello world --make
Hello all,
I'm trying to use CPP-defined strings in a Haskell module, like this:
main :: IO ()
main = putStrLn FOO
This of course will not work:
ghc -DFOO=hello world --make Main.hs -o test
You'll get this error message:
./Main.hs:6:16: Not in scope: `hello'
./Main.hs:6:22:
On Wed, Jul 9, 2008 at 2:22 AM, Marc Weber [EMAIL PROTECTED] wrote:
You're going to design something like that with an FPGA in it? :)
The FPGA is only used for developement. If everything works fine I'd
like to put it on the market. My hope is to get one low cost chip doing
everything this
On Tue, Jul 8, 2008 at 5:43 PM, Marc Weber [EMAIL PROTECTED] wrote:
Is Haskell still used (in industry as well ?) to write (V)HDL code to
program FPGAs and create circuits on chips?
Indeed! Galois maintains a language called Cryptol. Almost all tools for
this language, including an FPGA
On Thu, Jun 5, 2008 at 9:36 AM, Miguel Mitrofanov [EMAIL PROTECTED] wrote:
Check your types for typos.
On 5 Jun 2008, at 20:31, A A wrote:
Hi All
I can successfully compile the following code using ghci
import Data.Array.IArray
makeArray (lower, upper) f = listArray (lower, upper) [(f
On Tue, Jun 3, 2008 at 5:11 PM, Adam Smyczek [EMAIL PROTECTED] wrote:
Example:
data SampleType = A | B Int | C String | D -- etc.
sampleTypes = [A, B 5, C test] :: [SampleType]
How do I find for example element A in the sampleTypes list?
Do I have to create e.g.:
isA :: SampleType -
On Fri, May 30, 2008 at 5:28 PM, Martin Blais [EMAIL PROTECTED] wrote:
Allright, this is a definitely a newbie question.
I'm learning Haskell and going through the exercises in the
beautiful Hutton book, and one of them requires for me to
write a loop that queries a line from the user
On Fri, May 30, 2008 at 5:14 PM, Martin Blais [EMAIL PROTECTED] wrote:
On Fri, 30 May 2008 16:54:18 -0700, Philip Weaver
[EMAIL PROTECTED] said:
1. How do I catch the exception that is raised from read?
I think you want readIO, which yields a computation in the IO monad,
so it can
On Wed, May 28, 2008 at 2:53 PM, Pieter Laeremans [EMAIL PROTECTED] wrote:
Hello,
I need a break function that splits the list one element further than
the ordinary break.
This is the simplest solution I could imagine:
breakI :: (a - Bool) - [a] - ([a], [a])
breakI p s = case break p s of
2008/5/15 Olivier Boudry [EMAIL PROTECTED]:
Hi all,
It's the first time I use the runInteractiveCommand and I was probably
bitten by laziness.
When I run the following program and send its output to a file using ''
redirection I get the full output of the called process. But if I run it in
On Thu, May 15, 2008 at 11:42 AM, Ronald Guida [EMAIL PROTECTED] wrote:
It looks like a simple race condition to me. You are using
waitForProcess pid to wait for runInteractiveCommand to finish, but
you don't seem to have anything that waits for createDefFile to
finish.
Whoops, sorry, I
Ok, I'll ask the obvious question... did you try to re-configure?
runhaskell Setup.hs configure
2008/5/9 Galchin, Vasili [EMAIL PROTECTED]:
Hello,
I changed the version # in a cabal file and now I get ...
runhaskell Setup.hs configure
Configuring unix-2.4.0.0...
[EMAIL
On Sat, May 10, 2008 at 3:10 PM, PR Stanley [EMAIL PROTECTED] wrote:
Paul: Hi folks
data Maybe a = Nothing | Just a
What is the underlying rationale for the Maybe data type?
is it the
safe style of programming it encourages/
Something tells me this is going to start a
On Fri, Apr 25, 2008 at 11:49 PM, Brandon S. Allbery KF8NH
[EMAIL PROTECTED] wrote:
On Apr 26, 2008, at 2:36 , Ken Takusagawa wrote:
But this does not:
foo::IO a;
foo = do{
(x::a) - bar;
return x;};
Error message: A pattern type signature cannot bind scoped type
It looks quite clean (no funny business in Setup.lhs). I would favor
using this cabalized version over the other. Thanks!
So, autoconf/configure generate cryptol.buildinfo from
cryptol.buildinfo.in. Did you change configure.ac much? And the
Makefile is no longer needed at all, right?
- Phil
On Wed, Apr 23, 2008 at 4:49 PM, Gwern Branwen [EMAIL PROTECTED] wrote:
On 2008.04.23 12:26:35 -0700, Philip Weaver [EMAIL PROTECTED]
scribbled 1.2K characters:
It looks quite clean (no funny business in Setup.lhs). I would favor
using this cabalized version over the other. Thanks
2008/4/10 Cetin Sert [EMAIL PROTECTED]:
Hi,
Is GHC required to be installed on the target OS I compile Haskell binaries
for in order for these binaries to run? I need a quick answer on that!
If I parse your question correctly, the answer is no, you do not need
GHC installed to run the
Your gsi is buffered because there's no newline at the end. To flush
the buffer and force it to be printed immediately, use 'hFlush' from the
System.IO library, or use 'hSetBuffering' from that same library:
http://haskell.org/ghc/docs/latest/html/libraries/base/System-IO.html
I believe you can
On Dec 18, 2007 1:00 PM, Cristian Baboi [EMAIL PROTECTED] wrote:
This is what I understand so far ...
Suppose we have these two values:
a) \x-x + x
b) \x-2 * x
Because these to values are equal, all functions definable in Haskell must
preserve this.
This is why I am not allowed to define
On Dec 14, 2007 11:44 AM, Corey O'Connor [EMAIL PROTECTED] wrote:
I'm working through the interesting paper Data type à la carte and
am confused by the Functor instance for Val. I think this stems from
some confusion of mine regarding the Functor class in general.
I'll try to explain, but I
Maybe you should look into Parsec, a Haskell library for writing parsers.
Google should find what you need.
- Phil
On Dec 9, 2007 1:58 AM, Ryan Bloor [EMAIL PROTECTED] wrote:
hi
I have a function parseInt... which needs an error guard for when the
input is not an Int.
parseInt :: Parser
Well, you're choosing to parse each digit of your integer as a separate
integer, so if you want to combine them after reading you'll need to
multiply by powers of two. Or, you can just read in all the digits in one
'read' command, like this:
parseInt :: String - (Expr, String)
parseInt xs
I mean powers of *ten* :)
On Dec 8, 2007 10:48 PM, Philip Weaver [EMAIL PROTECTED] wrote:
Well, you're choosing to parse each digit of your integer as a separate
integer, so if you want to combine them after reading you'll need to
multiply by powers of two. Or, you can just read in all
If you add a third pattern, you can see exactly what it's failing to match:
kmerge x = error (show x)
In order to do this, you just need to add Show constraints for a and b in
the type of kmerge:
kmerge :: (Show a, Show b, Eq a) = [(a,[b])]-[(a,[b])]
You'll find that the pattern that
Should work with glasgow extensions (-fglasgow-exts).
- Phil
On Dec 1, 2007 6:43 PM, PR Stanley [EMAIL PROTECTED] wrote:
Hi
type assoc k v = [(k, v)]
works beautifully and everything makes sense.
type Assoc v = (Ord k) = [(k, v)]
This doesn't work. Is there any wayof defining k as
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