I agree, but with a slight difference. Since I am so lazy, if Binary
fits, like 80% of my requirements, for example this case, only
[String] is not OK. I'd like to reuse it with a little modification
made by myself, rather than re-write almost the whole of it.
But for Data.Binary, I think this
Hi all,
It seems that (at least) the postgresql bindings do not allow pure
binary data.
I have a simple table:
debug=# create table test (name bytea);
byteas seems to be the backing type on the DB side for bytestrings.
and then I run this:
import Database.HDBC.PostgreSQL
import
On Fri, Jan 7, 2011 at 11:44 AM, Iustin Pop ius...@google.com wrote:
Hi all,
It seems that (at least) the postgresql bindings do not allow pure
binary data.
I have a simple table:
debug=# create table test (name bytea);
byteas seems to be the backing type on the DB side for bytestrings.
On 06/01/2011 05:44, Mark Lentczner wrote:
On Jan 4, 2011, at 5:41 PM, Antoine Latter wrote:
Are you thinking that the BOM should be automatically stripped
from UTF8 text at some low level, if present?
It should not. Wether or not a U+FFEF can be stripped depends on
context in which it is
Hi.
I'm planning to propose a language extension for Haskell to make it possible to
control the visibility of type class instances in module export and import
lists as a research project. I'm planning to implement this in GHC. I've
already mentioned it in #...@irc.freenode.net and got
The objection to this I recall hearing is that it would make it
possible for different parts of the program to see different instances
for a given type (local instances, effectively), which would have
interesting results. I don't know if there's a way to implement the
feature which avoids this, or
Seeing all the good discussion on this thread, I think we are missing
a TDD page on our Haskell.org wiki. =)
Cheers,
--
Felipe.
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On 01/07/2011 05:24 AM, Michael Snoyman wrote:
On Fri, Jan 7, 2011 at 11:44 AM, Iustin Popius...@google.com wrote:
Yes, I had a bug reported in persistent-postgresql that I traced back
to this bug. I reported the bug, but never heard a response. Frankly,
if I had time, I would write a low-level
On Fri, Jan 07, 2011 at 09:49:35AM -0600, John Goerzen wrote:
On 01/07/2011 05:24 AM, Michael Snoyman wrote:
On Fri, Jan 7, 2011 at 11:44 AM, Iustin Popius...@google.com wrote:
Yes, I had a bug reported in persistent-postgresql that I traced back
to this bug. I reported the bug, but never
On 01/07/2011 09:49 AM, John Goerzen wrote:
On 01/07/2011 05:24 AM, Michael Snoyman wrote:
On Fri, Jan 7, 2011 at 11:44 AM, Iustin Popius...@google.com wrote:
Yes, I had a bug reported in persistent-postgresql that I traced back
to this bug. I reported the bug, but never heard a response.
I've tried to solve this but I am failing.
I can do this:
p0-panel nb []
e0-textCtrl p [text:=my_list!!0]
but I want to do this on all of my_list, so I tried:
let es = map (\x- textCtrl (panel nb []) [text:=x]) my_list
Now, this won't work because the panel nb [] is IO (Panel()) and the
On 7 January 2011 06:20, Joe Bruce bruce.jo...@gmail.com wrote:
Thanks Max. That makes a lot of sense. That change got me to the point of
linking lambdabot.
Well, I tried to see if I could reproduce your problem but didn't get
to this stage. It looks like v4.2.2.1 from Hackage hasn't been
On Fri, Jan 7, 2011 at 11:00 AM, Max Bolingbroke
batterseapo...@hotmail.com wrote:
Well, I tried to see if I could reproduce your problem but didn't get
to this stage. It looks like v4.2.2.1 from Hackage hasn't been updated
for donkeys years and breaks massively because of at least the new
On Friday 07 January 2011 17:09:11, b1g3ar5 wrote:
I've tried to solve this but I am failing.
I can do this:
p0-panel nb []
e0-textCtrl p [text:=my_list!!0]
but I want to do this on all of my_list, so I tried:
let es = map (\x- textCtrl (panel nb []) [text:=x]) my_list
Now, this won't
Thanks for your reply but it doesn't quite solve the problem. This:
plist - mapM (\x- (panel nb [])) my_list
returns [Panel()] and works as you say, but:
elist - mapM (\x- (textCtrl (panel nb []) [text := contents x]))
my_list
still won't work because the function panel returns a IO (Panel())
On Friday 07 January 2011 19:01:43, b1g3ar5 wrote:
Thanks for your reply but it doesn't quite solve the problem. This:
plist - mapM (\x- (panel nb [])) my_list
returns [Panel()] and works as you say, but:
elist - mapM (\x- (textCtrl (panel nb []) [text := contents x]))
my_list
still
Nearly - the first suggestion doesn't work because each es needs a new
panel I can't use the same one each time.
The second suggestion doesn't quite work because the x in [text :=
contents x] is not in scope of the \p function.
Thanks.
N
On Jan 7, 6:29 pm, Daniel Fischer
I've briefly gone through the Ur demo at http://impredicative.com/ur/demo/
Ur looks very impressive, so the natural question I'm asking myself is: How
does it stack up against haskell frameworks, and why can't Ur be implemented
in Haskell?
I'm thinking mainly of the safety guarantees, not
On Friday 07 January 2011 19:45:26, b1g3ar5 wrote:
Nearly - the first suggestion doesn't work because each es needs a new
panel I can't use the same one each time.
The second suggestion doesn't quite work because the x in [text :=
contents x] is not in scope of the \p function.
Hmm,
Prelude
* Jonathan Geddes:
When I write Haskell code, I write functions (and monadic actions)
that are either a) so trivial that writing any kind of unit/property
test seems silly, or are b) composed of other trivial functions using
equally-trivial combinators.
You can write in this style in any
Yes you're right I had brackets wrong (and the 'where' version is
easier to read), thanks.
I think the where style works best - or maybe flip and a dangling \x-
.
I maybe slow but I'm learning.
N
On Jan 7, 7:21 pm, Daniel Fischer daniel.is.fisc...@googlemail.com
wrote:
On Friday 07 January
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On 1/3/11 18:21 , Eric wrote:
I would like to use freeglut instead of GLUT for my Haskell OpenGL program,
but when I place the freeglut dll in the program's directory and try to run
the program on Windows XP, I get the following error message:
On Fri, Jan 7, 2011 at 8:00 AM, Max Bolingbroke
batterseapo...@hotmail.comwrote:
I don't think readline links against iconv. What that error says to me
is that GHC is failing to link against *any* iconv. I bet that it's
because you have iconv installed via Macports without +universal. Try:
$
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On 1/6/11 02:27 , Joe Bruce wrote:
Now I'm stuck on readline again [lambdabot build step 28 of 81]:
/Users/joe/.cabal/lib/readline-1.0.1.0/ghc-6.12.3/HSreadline-1.0.1.0.o:
unknown symbol `_rl_basic_quote_characters'
This sounds like the cabal
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On 1/7/11 14:14 , Alexander Kjeldaas wrote:
Ur looks very impressive, so the natural question I'm asking myself is: How
does it stack up against haskell frameworks, and why can't Ur be implemented
in Haskell?
I'm thinking mainly of the safety
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I am wondering if it possible to generalise catMaybes:
(Something f, SomethingElse t) = t (f a) - t a
I have being doing some gymnastics with Traversable and Foldable and a
couple of other things from category-extras to no avail. Perhaps
someone
I am trying to evaluate the polymorphism technique used in Hackage library.
I like to know if the approach taken is right or not.
The code in question is in the Hoaut package
http://hackage.haskell.org/package/hoauth/
As far as I can understand the code wants to have polymorphism on HTTP
client
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On 1/7/11 21:56 , Tony Morris wrote:
I am wondering if it possible to generalise catMaybes:
(Something f, SomethingElse t) = t (f a) - t a
I have being doing some gymnastics with Traversable and Foldable and a
couple of other things from
On Wed, Jan 5, 2011 at 7:31 PM, Chung-chieh Shan
ccs...@post.harvard.edu wrote:
Besides those example inputs and expected outputs, what about:
If two signals are (in)compatible then after applying some simple
transformations to both they remain (in)compatible? A certain family of
signals is
On Fri, Jan 7, 2011 at 9:56 PM, Tony Morris tonymor...@gmail.com wrote:
I am wondering if it possible to generalise catMaybes:
(Something f, SomethingElse t) = t (f a) - t a
I have being doing some gymnastics with Traversable and Foldable and a
couple of other things from category-extras
If you always expect to be passing c as a parameter and never
returned, it is probably better off as a data type. Eg. HTTPClient
might look like a traditional OO class:
class HTTPClient c where
foo :: c - stuff
bar :: c - stuff
I've found that it is easier to work with if
I should say that this reimplementation would be good. If you can
compare two implementations (one in plain Haskell and second in
declarative QuickCheck rules) you will be better that with only one.
This presumes I know how to write a simple but slow version. Clearly,
that's an excellent
Hi,
I've written a function to encode a color value of type (Int,Int,Int)
into 8,16 or 32 byte ByteString depending on the value of bits per
pixel. This is for my VNC server implementation.
I'd appreciate some feedback on the Haskellism of the implementation.
import Data.Bits
import
On 8 January 2011 16:27, C K Kashyap ckkash...@gmail.com wrote:
Hi,
I've written a function to encode a color value of type (Int,Int,Int)
into 8,16 or 32 byte ByteString depending on the value of bits per
pixel. This is for my VNC server implementation.
I'd appreciate some feedback on the
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