recursively replacing all
the names in it with their definitions, until the only names left are
built-in primitives.
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I don't think that CAN be done in Haskell (but just in case, I'm only
saying it once).
2009/5/7 Neil Brown :
> Although I heard that if you chant "I don't think this can be done in
> Haskell" three times in front of a text editor, Don Stewart appears and
> implements it in one line...
___
What is enum2 doing in all of this - it appears to be ignored.
2009/6/18 Jake McArthur :
> Jake McArthur wrote:
>>
>> Generally, you can transform anything of the form:
>>
>> baz x1 = a =<< b =<< ... =<< z x1
>>
>> into:
>>
>> baz = a <=< b <=< ... <=< z
>
> I was just looking through the so
.nabble.com/Data.Time-is-so-weak--%21-tp25218462p25218554.html
> Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com.
>
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ntation failure is because haddock can't find the
source code (nor can I), but I don't know why there is no source
installed in .cabal/packages - what should I do to further track this
problem down?
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I'm trying to add a state monad onto the IO monad for use in a
happstack application. I thought this should involve using StateT and
Happstack.Server.SimpleHTTP.simpleHTTP', but I can't figure out how to
plumb it all together. Any tips will be welcome.
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Thanks. That was all I needed to sort it out.
2009/9/2 Martijn van Steenbergen :
> Hi Colin,
>
> Colin Adams wrote:
>>
>> I'm trying to add a state monad onto the IO monad for use in a
>> happstack application. I thought this
2009/9/4 David Menendez :
> On Thu, Sep 3, 2009 at 6:34 PM, Maciej Piechotka wrote:
>> (df <<< dg,
>
> Should that be "df *** dg"?
Is swearing allowed on this mailing list?
:-)
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alues to select from is of type [(a, h)] and the
result type is a.
Am I missing something?
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geInputForm = F.plug (\xhtml -> X.p << (X.label << "Image file:")
+++ xhtml) F.file
Are there any known problems with the file formlet? Might it be OSX specific?
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It needs some missing C libraries - gd, png, jpeg, fontconfig and freetype.
Does anyone know what to do to install these on OSX?
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2009/9/22 Brandon S. Allbery KF8NH :
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA1
>
> On Sep 22, 2009, at 13:44 , Colin Adams wrote:
>>
>> It needs some missing C libraries - gd, png, jpeg, fontconfig and
>> freetype.
>> Does anyone know what to do to ins
Thanks Judah. That was all it took. :-)
2009/9/23 Judah Jacobson :
> On Wed, Sep 23, 2009 at 12:23 AM, Colin Adams
> wrote:
>> 2009/9/22 Brandon S. Allbery KF8NH :
>>> -BEGIN PGP SIGNED MESSAGE-
>>> Hash: SHA1
>>>
>>> On Sep 22, 2009, at 13
2009/11/25 Mark Lentczner :
> The current version of Unicode is 5.1. This text is now in D90, though
> otherwise the same. My references below are to the 5.1 documents (freely
> available on line at: http://www.unicode.org/versions/Unicode5.1.0/ )
It's been 5.2 for over a month now, I think.
__
> Please help me understand the holes in Haskell's type system.
Not really wanting to support the troll, but ...
unsafePerformIO?
Can't it be removed?
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> Nei
>
> On 4 Dec 2009, at 08:57, Colin Adams wrote:
>
>>> Please help me understand the holes in Haskell's type system.
>>
>> Not really wanting to support the troll, but ...
>>
>> unsafePerformIO?
>>
>
2009/12/7 drostin77 :
>
> Hello Hopefully Helpful Haskell Community!
>
> (I really wanted that to be alliteration... couldn't come up with an h word
> for community)
House?
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.cabal file to add the above line, and re-installing it.. But this is
likely to trickle through all the packages I have installed.
So I was looking for a way to make it the default. But I guess this
won't scale (if a package already has a pgmF preprocessot, there would
be a conflict).
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What about 'inject'?
On 6 August 2013 09:09, Karol Samborski wrote:
> What about 'pack'?
>
> Best,
> Karol
>
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I thought the OP was talking about software contracts (as in Eiffel /
Design By Contract ).
Liquid Haskell is interesting in this respect. Though I doubt if it
qualifies as mature.
On 7 August 2013 16:15, Duncan Coutts wrote:
> On Mon, 2013-08-05 at 23:13 -0400, Julian Arni wrote:
> > I've com
On 21 September 2013 08:34, Stijn van Drongelen wrote:
> * As mentioned, there is a total order (Ord) on floats (which is what you
> should be using when checking whether two approximations are approximately
> equal), which implies that there is also an equivalence relation (Eq).
>
how do you ge
Only for meanings of "better" which do not imply as good performance.
On 2 October 2013 14:46, Stijn van Drongelen wrote:
> I do think something has to be done to have an Eq and Ord with more strict
> laws.
>
> * Operators in Eq and Ord diverge iff any of their parameters are bottom.
> * The de
2009/1/13 Andrew Coppin :
> One of the wonderful things about Haskell is that almost any time anybody
> posts code, at least one person will think up an alternative but equivilent
> way of achieving the same goal - sometimes by radically different steps.
>
> Maybe we should have a name for this ef
2009/2/9 minh thu :
>
> Anyway, I'd like to get my utf-8 string to C but in ascii (or latin1).
>
> How can do this ?
You can't (in general).
If the data just happens to be ascii, then your utf-8 string will BE
ascii (there is no way to tell the difference). If it just happens to
be in the range o
If you have two functions that do two different things, then they
certainly OUGHT to have different names.
You can of course put the two functions in different modules. Then
they do have different (qualified) names.
2009/2/13 Daniel Kraft :
> Hi,
>
> I just came across a problem like this: Suppo
2009/3/5 Hans Aberg :
> GHC says that for any set x, there are no cardinalities between card x and
No it doesn't.
It says there is a syntax error in my code.
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thout having to deal with
>> Ross> the dual-GHC macports mess..
>>
>> Ross>
>> http://www.haskell.org/haskellwiki/Gtk2hs#Using_the_GTK.2B_OS_X_Framework
>>
>> I just tried this.
>>
>> The configure enables cairo, but does not enable svgcairo. Is there
&
ough if you want to paste them here maybe I can help with them.
>
> -Ross
>
> On Mar 21, 2009, at 1:27 PM, Colin Adams wrote:
>
>> If I try this, pango fails to compile with lots of error messages
>> about error: macro names must be identifiers.
>>
>> I thi
OK - I added the --with-user-pkginfo flag.
It nearly all works now - but still no svgcairo - ./configure doesn't find it.
2009/3/21 Ross Mellgren :
> (back to the list)
>
> Answers inline:
>
> On Mar 21, 2009, at 2:42 PM, Colin Adams wrote:
>
>> Yes, that was the p
It didn't.
2009/3/21 Ross Mellgren :
> Did the configure for gtk2hs claim that it was going to build svgcairo? If
> something is wrong with the librsvg install, it won't.
>
> -Ross
>
> On Mar 21, 2009, at 4:49 PM, Colin Adams wrote:
>
>> OK - I added the --wit
And the reason is that librsvg fails to find cairo, pangocairo and cairo-png.
Where is it supposed to find them?
2009/3/21 Colin Adams :
> It didn't.
>
> 2009/3/21 Ross Mellgren :
>> Did the configure for gtk2hs claim that it was going to build svgcairo? If
>> s
OK, I got it installed, but build warned me of duplicate dylibs, and
running my program gave a bus error.
So I port uninstalled gtk2, so now it compiled without warnings, but
the program won't run because I had been forced to uninstall pangoft
to uninstall gtk2.
So now I need to uninstall the gtk
bgnomecanvas
Error: Status 1 encountered during processing.
Which is singularly uninformative to me. It looks like I am not going
to be able to do any haskell programming next week when I am away with
only a macbook.
2009/3/22 Hans Aberg :
> On 22 Mar 2009, at 10:28, Colin Adams wrote:
>
>>
No. It's all recent.
2009/3/22 Hans Aberg :
> On 22 Mar 2009, at 11:32, Colin Adams wrote:
>
>> creating build/temp.macosx-10.3-i386-2.5
>> -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/opt/local/include
>>
>> -I/opt/local/Library/Frameworks/Python.frame
2009/3/22 Hans Aberg :
> On 22 Mar 2009, at 11:32, Colin Adams wrote:
>
>> I tried issuing the sudo port install command on the wiki page.
>
> What did you try to install? ...
Just what it says on the wiki page:
sudo port install glade3 libglade2 gstreamer gst-plugins-base
g
hen I type make, I get (after a lot of compiling):
No rule to make target `glib/System/Glib/GObject_stub.p_o needed by' ...
I shall try again without enmabling profiling support.
2009/3/22 Brandon S. Allbery KF8NH :
> On 2009 Mar 22, at 6:32, Colin Adams wrote:
>>
>> creati
2009/3/22 Colin Adams :
> No, I haven't done that - I forgot about that command since I first
> installed macports nearly a year ago. :-(
>
> Bit I DID manage to get the ports all installed (thanks to lots of
> help from Hans, and lots of individual port uninstalls followe
2009/3/24 Jonathan Cast :
> On Tue, 2009-03-24 at 22:33 +0300, Eugene Kirpichov wrote:
>> Pretty cool once you know what the function does, but I must admit I
>> wouldn't immediately guess the purpose of the function when written in
>> this way.
>
> I wouldn't immediately guess the purpose of the f
2009/3/25 wren ng thornton :
>> Most of the "documentation" is in research papers, and a "normal"
>> programmer don't want to read these papers.
>
> Yes, and no. There is quite a bit of documentation in research papers, and
> mainstream programmers don't read research. However, this is a big part
2009/3/27 Achim Schneider :
> wren ng thornton wrote:
>
>> Colin Adams wrote:
>> > 2009/3/25 wren ng thornton :
>> > when I look up the Haddock-generated documentation for a function, I
>> > DON'T appreciate it if that is in the form of a hyperlink to
On 30 December 2011 16:59, Gregg Reynolds wrote:
>
> On Fri, Dec 30, 2011 at 12:49 AM, Heinrich Apfelmus <
> apfel...@quantentunnel.de> wrote:
>
>>
>> The function
>>
>> f :: Int -> IO Int
>> f x = getAnIntFromTheUser >>= \i -> return (i+x)
>>
>> is pure according to the common definition of "p
On 30 December 2011 17:17, Gregg Reynolds wrote:
>
> On Dec 30, 2011, at 11:04 AM, Colin Adams wrote:
>
>
>
> On 30 December 2011 16:59, Gregg Reynolds wrote:
>
>>
>> On Fri, Dec 30, 2011 at 12:49 AM, Heinrich Apfelmus <
>> apfel...@quantentunnel.de&
On 30 December 2011 17:27, Conal Elliott wrote:
> On Fri, Dec 30, 2011 at 9:20 AM, Colin Adams wrote:
>
>>
>> proof: f is a function, and it is taking the same argument each time.
>> Therefore the result is the same each time.
>>
>
> Careful of circular reaso
I don't find it (the English title) humorous. I just assumed it was written
by a non-native English speaker.
On 2 May 2012 18:18, Brent Yorgey wrote:
> I am curious how the title was translated. Of course, the English
> title "Learn You a Haskell for Great Good" uses intentionally
> ungrammatic
Oops. Forget to reply to all.
-- Forwarded message --
From: Colin Adams
Date: 17 May 2012 08:43
Subject: Re: [Haskell-cafe] Can Haskell outperform C++?
To: Roman Werpachowski
On 17 May 2012 07:12, Roman Werpachowski wrote:
>
> It depends on what you use the code for
This doesn't seem to be up-to-date. It announces GHC 7.4 released (but
7.6.1 was released a couple of weeks ago).
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That's VERY efficient (2014 editions out in 2012).
:-)
On 19 October 2012 16:37, Mark Lentczner wrote:
> Haskellistas -
>
> The second release candidate of HP 2014.4.0.0 is now available:
>
> Source tarball: haskell-platform-2012.4.0.0-rc2.tar.gz
> Mac 32-bit installer: Haskell Platform 2012.4.0
I'm not viewing on a narrow device, and I see the wrapped (and the whole
post confined to the centre of the screen).
I certainly don't use an 80-column limit any more. I use the rule:
A function must be completely visible in my editor on my screen. (but this
is only a good rule if most people who
On 13 December 2012 08:09, Michael Snoyman wrote:
> To take this out of the academic realm and into the real-life realm: I've
> actually done projects for companies which have corporate policies
> disallowing the usage of any copyleft licenses in their toolset. My use
> case was a web application
There have been lots of proposals to fix the CATCALL problems in recent
years. None have been implemented (at least in ISE/GEC compilers. And
tecomp has been abandonded by its author - he is now writing a series of
blogs about a vapourware product called "Modern Eiffel").
I don't find the CATCALL
machines etc. - only to find out that you have not
> been visited once by IE 6.
>
And you have to pay for a copy of MS-Windows to run in your VM.
I.e. YOU (read I) have to pay to support someone else's broken software.
So you wouldn't catch me trying to support IE 6 (or anythin
I'd wage money on it.
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wouldn't dismiss
> it off-hand like that.
>
> On Mon, Feb 28, 2011 at 10:16 AM, Colin Adams <
> colinpaulad...@googlemail.com> wrote:
>
>> On 28 February 2011 14:59, Tom Hawkins wrote:
>>
>>> I have been wanting to gain a better understanding of i
t;
> Prelude> words "abc def\xA0ghi"
> ["abc","def\160ghi"]
>
> Regards,
> Malcolm
>
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2011/4/4 Roel van Dijk
> Hello,
>
> The Haskell 2010 language specification states that "Haskell uses
> the Unicode character set" [1]. I interpret this as saying that,
> at the lowest level, a Haskell program is a sequence of Unicode
> code points. The standard doesn't say how such a sequence sh
a pragma, it will be
fairly pointless putting this in the standard.
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>
True, but we could say that UTF-8 is complusory in the absence of a module
declaration.
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cing (though
you may want to remove many trace statements when you are convinced the code
is thoroughly debugged).
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> Okay, I'm done now. :-)
>
> Cheers,
> Greg
>
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On 23 November 2011 22:02, Tom Murphy wrote:
>
>
> The current impression that we give is that Haskell98 is the current
> standard, and Haskell2010 isn't compiler-supported.
>
>
> Indeed, but yesterday there was a post on beginners where the OP said they
didn't want to use extensions, just plain
No.
On 23 November 2011 19:11, heathmatlock wrote:
> Question: Do you want a mascot?
>
> Answers:
> Yes
> No
>
>
> --
> This is an attempt to figure out if this idea is going anywhere.
>
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I would think there were plenty of Haskell programmers ready to jump in as
replacements.
On 16 December 2011 15:37, Michael Litchard wrote:
> I'm learning what it means to be a professional Haskell programmer,
> and contemplating taking on side jobs. The path of least resistance
> seems to be we
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