mapM
> >
> > On Mon, Jun 25, 2012 at 5:04 PM, Arlen Cuss > (mailto:a...@len.me)> wrote:
> > > Magicloud,
> > >
> > > Try to reduce the particular problem you're having to the smallest
> > > possible example that reproduces t
Magicloud,
Try to reduce the particular problem you're having to the smallest possible
example that reproduces the issue. None of us can compile your code, either,
because we're missing many of the dependencies, and unfortunately the issue is
no easier (for me) to track down with the full sourc
> In standard ML you can start doing effect-based things inside a function
> without having to alter its type and they type of everything that uses it,
> and so on.
This in turn causes a break-down in the type-system where weak type variables
are introduced. We can see the pathological case for
n 14, 2012 at 12:28 PM, Ivan Lazar Miljenovic
> > > > mailto:ivan.miljeno...@gmail.com)> wrote:
> > > > > On 14 June 2012 14:20, Magicloud Magiclouds
> > > > > > > > > (mailto:magicloud.magiclo...@gmail.com)> wrote:
> > > > > > OK. I think I und
(resending to café, turns out I wasn't subbed from this address.)
Hi Magicloud,
This is correct; because you've hidden the type-variables away by universally
quantifying them, there's no more level of specificity you can get back *out*
of them than just "some kind of Map" (Job = M.Map k b, where
You heard it here first; Simon's down here in Aus to "eat pizza,
university departments, Haskell users groups". Will he leave nothing left!?
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9/08/2011 11:54 AM, Oscar Picasso kirjutas:
> Hi,
>
> Is there a public blog that that allow syntax highlighting of Haskell code?
Are you talking about a plugin for a blog engine? CodeColourer on
WordPress will do it.
Arlen
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27/07/2011 4:25 PM, Tom Murphy kirjutas:
> On 7/27/11, Richard O'Keefe wrote:
>
>> A quick web search for "Mac OS X gcc binary" turned up
>> http://hpc.sourceforge.net/index.php
>> with binary releases of GCC 4.6 for Lion and Snow Leopard.
>>
>> This requires "Developer Tools", but that isn't XCo
27/07/2011 3:27 PM, Maciej Wos kirjutas:
> If you're using Lion you can get Xcode from the App Store (Apple used
> to charge something for it, but now it is free).
>
> If you're using Snow Leopard you can download Xcode from
> developer.apple.com/xcode. See "Looking for Xcode 3? Download Now" in
>
On 24.07.2011 08:20, Ivan Lazar Miljenovic wrote:
> On 24 July 2011 04:41, KC wrote:
>> It would be easier for beginners to "grok".
I quite like mempty/mappend; they (f)map onto the [] instance as a mnemonic.
Similarly, MonadPlus (as a concept) maps to mzero/mplus quite well (and
it's distinguis
Hi cafe!
I feel a bit like I'm speaking out of turn for bringing this up -- and
I'm sure it must have been brought up many times before -- but I hope
there can be something fruitful had from a discussion.
In my travels I've read several people with much better grasp of Haskell
than I have mention
> When I remove the "scoresPassed <- sqlReaderIO" line, the code run
> smoothly. Nothing else references "scoresPassed". The ghc, however,
> gives me this error when the line is included:
I'm not 100% sure, but what if you put a liftM or liftIO in somewhere?
> (liftM output) . renderHtml $ ...
> Just curious, the following is not allowed in Haskell either for the
> same reason.
>
> applySkip i f ls = (take i) ls ++ $ f $ drop i ls
This doesn't work for a slightly different reason; you can't use the
infix operators beside each other ("++ $"), but if you could, it'd work!
__
> applySkip i f ls = (take i) ls ++ f (drop i ls)
>
> But the following doesn't:
>
> applySkip i f ls = (take i) ls ++ f $ drop i ls
The issue is with operator precedence. The above is equivalent to:
> applySkip i f ls = ((take i) ls ++ f) (drop i ls)
(++) binds more strongly than ($).
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On 22/06/2011 2:24 PM, Daniel Peebles wrote:
> Hey, I think you forgo
Hahah, this reminds me of the time I onc
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> import Data.Either
> type (:|:) a b = Either a b
> (???) = either
>
> foo :: (Int :|: Bool :|: String :|: Double) -> Int
> foo =
> \ i -> i + 7 ???
> \ b -> if b then 1 else 0 ???
> \ s -> length s ???
> \ d -> floor d
INFIX TYPE OPERATORS!!??!
O_
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On 20/06/11 18:00, Dmitri O.Kondratiev wrote:
> Hi,
> What is right way to do conditional IO?
> For example, I need to write to file errors only in case they exist,
> otherwise my function should do nothing:
>
> handleParseErrors errors
> | (not . n
In no particular order, the following seem to have good Linux support:
Gentoo, Arch, Fedora and Debian (I think Testing).
Please allow me to register my amusement at the idea of a distribution
"with good Linux support". :D
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> Should I abandon the ghc debian package and install the haskell-platform ?
> Should I simply build ghc 7.0 independently ?
This is the way I went; I installed the latest ghc from source, then
haskell-platform from source. Works a treat!
Arlen
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On Sat, 2011-05-21 at 04:56 -0700, michael rice wrote:
> (fromList
> [(("\n","\n"),["I"]),(("\n","I"),["am"]),(("I","am"),["lost."])],("am","lost."),[])
Or splitting that out:
(fromList
[(("\n","\n"),["I"]),(("\n","I"),["am"]),(("I","am"),["lost."])],
("am","lost."),
[])
Note that it's a triple,
On Fri, 2011-05-20 at 19:04 -0700, michael rice wrote:
> markov4.hs:35:27: Couldn't match expected type `Map k a'
> against inferred type `(Map Prefix [String], Prefix, [String])'
ghc seems to believe `mp' here is not just a map, but the entire state
(which is what execState is meant to give
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