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From: maalex00@marvin.informatik.uni-dortmund.de (Markus Alex)
Newsgroups: comp.lang.beta
Subject: Re: WHY no multi-dimensional arrays?
Date: Thu, 05 Jun 1997 11:00:53 +0200
Organization: CS Department, University of Dortmund, Germany
Lines: 37
Message-ID: <maalex00-0506971100530001@ls1ethermac7.informatik.uni-dortmund.de>
References: <338E7015.6B89@rz.ruhr-uni-bochum.de>
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Xref: news.daimi.aau.dk comp.lang.beta:11128

In article <338E7015.6B89@rz.ruhr-uni-bochum.de>, Joerg Digulla
<Joerg.Digulla@rz.ruhr-uni-bochum.de> wrote:

> Greetings!

Hello!
 
> Does anybody know why there are no multi-dimensional arrays in BETA?

Not me ...

> I know that I could write some pattern simulating such arrays, but no
> technique I can think of has the striking elegance of a definition like,
> e.g.,
> 
> (# a: [x][y]@integer;
>         .
>         .
>     a[1][2] -> ...
>         .
>         .            #)

But you can do it with elegance and without writing your own new pattern.
This way is described in the "Mjølner BETA System Tutorial" (You can 
download it from http://www.mjolner.dk/Manuals/r4.0.3/#tutorials). 
You then can read on page 28f:

"It is not possible to make multidimensional repetitions using the current 
version of the Mjølner BETA System. However, multidimensional repetitions 
are easily constructed, e.g. a repetition with dimension NxM can be 
declared like:

   mul_table: [N*M] @Integer;"

I hope this hint will help you ...

Markus