Re: Can Ada iterate over Nd array?

[Adam Beneschan <adam@irvine.com>]

On Wednesday, April 25, 2012 11:02:13 PM UTC-7, Okasu wrote:
> On 2012-04-26, Jeffrey Carter wrote:
> >
> > type Three_D is array (1 .. 3, 7 .. 300, 'A' .. 'Z') of Integer;
> >
> > A : Three_D;
> >
> > for I in A'range (1) loop
> >     for J in A'range (2) loop
> >        for K in A'range (3) loop
> >           -- Do something with A (I, J, K)
> >        end loop;
> >     end loop;
> > end loop;
> >
> 
> It's a brain dead code.
> So you trying to say that i have to write loops for 10/100/1000d arrays
> by hand?

I don't think I've *ever* seen an array with more than three dimensions ever used, in 35 years of programming.  (Exception: I think I once created a 4-dimensional array in APL in an attempt to write a one-line function to do something complicated.  But that's more of a game, not really programming.)  If you really need a way to associate arbitrarily long tuples with elements, you probably should be using some other kind of structure than an array.

But I think Ada 2012 does support what you're looking for; see the example at the bottom of 5.5.2 (http://www.ada-auth.org/standards/12rm/html/RM-5-5-2.html).

                    -- Adam