Dear all,
why is this allowed (GHCi, version 7.4.1):
main :: IO ()
main = do
let a, a :: Int
a = 5
print a
but this not:
main :: IO ()
main = do
let a :: Int
a :: Int
a = 5
print a
Is there a deeper sens or is it just a little bit inconsistent?
Heinrich
___
Hello all. I'm using the Data.Vector.generate function with a complicated
creation function to create a long vector. Is it possible to parallelize
the creation of each element?
Alternatively, if there was something like parMap for vectors, I suppose I
could pass id to Data.Vector.generate and use
I agree that fromList or pattern matching at the function or case level are
readable. We probably don't need new sugar. For what it's worth, in scala
you can use "->" to construct tuples, so you'll sometimes see maps created
like this:
Map(1 -> "one", 2 -> "two", 3 -> "foo")
You can always do som
Hi Corentin,
On Wed, Mar 27, 2013 at 09:13:41PM +0100, Corentin Dupont wrote:
> I have a function that looks like this:
> call :: SomeFunction -> String -> SomeState
>
> The string is actually the representation of the function passed in
> parameter. It is stored in the state for documentation.
> Sorry, I forgot to explain (probably because I'm too used to it). I am
referring to a syntax for easy creation of maps. Something equivalent to
lists:
>
> to build a list: [ 1, 2, 3]
> to build a map; { 1, "one", 2, "two", 3, "three"}
>
> Without it I am always forced to use fromList.
This looks
Hi Café,
I have a function that looks like this:
call :: SomeFunction -> String -> SomeState
The string is actually the representation of the function passed in
parameter. It is stored in the state for documentation.
So a call looks like that:
call (\a -> putStrLn a) "\a -> putStrLn a"
There is
Sorry, I forgot to explain (probably because I'm too used to it). I am
referring to a syntax for easy creation of maps. Something equivalent to
lists:
to build a list: [ 1, 2, 3]
to build a map; { 1, "one", 2, "two", 3, "three"}
Without it I am always forced to use fromList.
Răzvan
On 27 Marc
On Wed, 2013-03-27 at 21:30 +0200, Răzvan Rotaru wrote:
> I am terribly missing some syntactic sugar for maps (associative data
> structures) in Haskell. I find myself using them more than any other
> data
> structure, and I think there is no big deal in adding some sugar for
> this
> to the langua
I'm genuinely curious as to how you use maps. I've found I use them far
less in Haskell than in any other language: I only use them in select
circumstances. And most of those uses would not benefit from a mayo literal.
I suspect that many of the uses of map literals are better replaced with
someth
On 28 March 2013 06:30, Răzvan Rotaru wrote:
> Hi,
>
> I am terribly missing some syntactic sugar for maps (associative data
> structures) in Haskell. I find myself using them more than any other data
> structure, and I think there is no big deal in adding some sugar for this to
> the language. I
Hi,
I am terribly missing some syntactic sugar for maps (associative data
structures) in Haskell. I find myself using them more than any other data
structure, and I think there is no big deal in adding some sugar for this
to the language. I could not find out whether such an extension is beeing
di
Very helpful, thanks! I may come back with more singleton/type families
questions :)
On Tue, Mar 26, 2013 at 6:41 PM, Richard Eisenberg wrote:
> Hello Paul,
>
> > - Forwarded message from Paul Brauner -
>
>
>
> > - is a ~ ('CC ('Left 'CA)) a consequence of the definitions of SCC,
> >
I have posted this version.Mad home grown HashMap and replaced IOref with
Ptr.This made program twice as fast as current entry.
{-# Language BangPatterns #-} The Computer Language Benchmarks Game--
http://benchmarksgame.alioth.debian.org/ Contributed by Branimir
Maksimovic--import Data.B
At Wed, 27 Mar 2013 00:50:21 +,
Niklas Hambüchen wrote:
> Hey,
>
> according to
> http://hackage.haskell.org/packages/archive/bytestring/0.10.2.0/doc/html/Data-ByteString.html#v:split
> I can write:
>
> split '\n' "a\nb\nd\ne"
>
> Can I really do that? I don't know of a way to make a '\n' li
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