[Haskell-cafe] How to use arrays efficiently?

Lauri Oksanen lassoken at gmail.com
Fri May 16 09:45:50 EDT 2008

Yes, of course. How blind of me. Here is one more question.
If you change IOUArray to IOArray and add $! in front of the two summations
in the previous code, it still works correctly.
But can you do similar trick with Array and accumArray? I have tried to put
$! in different places in the first code that I posted but nothing seems to

On Fri, May 16, 2008 at 4:26 PM, Henning Thielemann <
lemming at henning-thielemann.de> wrote:

> On Fri, 16 May 2008, Lauri Oksanen wrote:
>  Thanks for help. I did some tests with UArray and it does the trick.
>> The problem remaining is, how to implement UArray Int (Double, Double,
>> Double)?
> Maybe an (UArray (Int,Int) Double) could help, where the second index range
> is fixed to (0,2).
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