Send Beginners mailing list submissions to
[email protected]
To subscribe or unsubscribe via the World Wide Web, visit
http://www.haskell.org/mailman/listinfo/beginners
or, via email, send a message with subject or body 'help' to
[email protected]
You can reach the person managing the list at
[email protected]
When replying, please edit your Subject line so it is more specific
than "Re: Contents of Beginners digest..."
Today's Topics:
1. arrays (Dennis Raddle)
2. Re: arrays (Rafael Gustavo da Cunha Pereira Pinto)
3. Re: arrays (David McBride)
----------------------------------------------------------------------
Message: 1
Date: Mon, 30 Jan 2012 10:41:17 -0800
From: Dennis Raddle <[email protected]>
Subject: [Haskell-beginners] arrays
To: Haskell Beginners <[email protected]>
Message-ID:
<CAKxLvoqiLu7EuUvsS4y9BwyjEoN3DGtNtLqMd7CoONL=oxv...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
I've got a problem that is linear time with mutable arrays, and something
god-awful complicated (not sure of time complexity) without them.
What's the easiest way to use and understand mutable arrays? is it
Data.Array that I want? Any good tutorials?
Thanks,
Dennis
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://www.haskell.org/pipermail/beginners/attachments/20120130/e03916ce/attachment-0001.htm>
------------------------------
Message: 2
Date: Mon, 30 Jan 2012 20:41:36 -0200
From: Rafael Gustavo da Cunha Pereira Pinto
<[email protected]>
Subject: Re: [Haskell-beginners] arrays
To: Dennis Raddle <[email protected]>, Haskell Beginners
<[email protected]>
Message-ID:
<CAKeofDy27_3hcSTxKCRmnfMiC5437FK8XSNZ=n6bnvo8jog...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
My advice as a begginer myself: experiment! Do some toy array operation,
such as matrix multiplication.
Test, test ans test. Mutable arrays are kinda easy, and very fast!
I did a LU matrix decomposition with pivoting a few years ago and it was
pretty awesome.
With mutable arrays it was about 5 times faster than normal arrays.
Regards
Rafael
On Mon, Jan 30, 2012 at 16:41, Dennis Raddle <[email protected]>wrote:
> I've got a problem that is linear time with mutable arrays, and something
> god-awful complicated (not sure of time complexity) without them.
>
> What's the easiest way to use and understand mutable arrays? is it
> Data.Array that I want? Any good tutorials?
>
> Thanks,
> Dennis
>
>
> _______________________________________________
> Beginners mailing list
> [email protected]
> http://www.haskell.org/mailman/listinfo/beginners
>
>
--
Rafael Gustavo da Cunha Pereira Pinto
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://www.haskell.org/pipermail/beginners/attachments/20120130/ad75a351/attachment-0001.htm>
------------------------------
Message: 3
Date: Mon, 30 Jan 2012 18:59:28 -0500
From: David McBride <[email protected]>
Subject: Re: [Haskell-beginners] arrays
To: Dennis Raddle <[email protected]>
Cc: Haskell Beginners <[email protected]>
Message-ID:
<CAN+Tr41=jaVT8f=mc=otdykq33hh7jw9y5xfyhsc0d0w7io...@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Try the vector library. It has both immutable and mutable arrays and
is very good.
On Mon, Jan 30, 2012 at 1:41 PM, Dennis Raddle <[email protected]> wrote:
> I've got a problem that is linear time with mutable arrays, and something
> god-awful complicated (not sure of time complexity) without them.
>
> What's the easiest way to use and understand mutable arrays? is it
> Data.Array that I want? Any good tutorials?
>
> Thanks,
> Dennis
>
>
> _______________________________________________
> Beginners mailing list
> [email protected]
> http://www.haskell.org/mailman/listinfo/beginners
>
------------------------------
_______________________________________________
Beginners mailing list
[email protected]
http://www.haskell.org/mailman/listinfo/beginners
End of Beginners Digest, Vol 43, Issue 35
*****************************************
