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Newsgroups: comp.lang.ada
Date: Mon, 25 Jul 2016 14:39:04 -0700 (PDT)
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Subject: Re: Using Access Types for a simple solution
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Xref: news.eternal-september.org comp.lang.ada:31167
Date: 2016-07-25T14:39:04-07:00
List-Id: <comp.lang.ada>

On Monday, July 25, 2016 at 11:28:22 AM UTC-4, ldries46 wrote:
> Thanks Dimitri,
>=20
> I did not realise that the aliased not before the array comes but before =
the=20
> box.
> The suggestion you did I tried before but the code became to complicated =
to=20
> be still readable.
> May be this not the best way to tackle my problem but is is better readab=
le=20
> and therefore better maintainable

I first read this hours ago, then left it to simmer while I went to a docto=
r's appointment.  I am sure solving your programming problem in Ada is easy=
.  What you need to learn first though is how to think about problems to be=
 solved in Ada.

It has been over 25 years since I tripped over the most important rule of s=
oftware engineering (not programming!) in Ada.  Model the problem space, no=
t the solution.  There may be lots of programs needed in a given problem sp=
ace, and you quickly learn that requirements change rapidly, even after the=
y have been frozen. ;-(

All I know so far is that you have a collection of records (called Boxes) a=
nd it may make sense to address them by row and column, or by pointer (acce=
ss value in Ada).  What activities make sense for your Boxes?  Creation? mo=
difying contents? sort? on what key? print? write to a file?  Have them cha=
se each other around the screen?

There are other possibilities.  The Ada standard library has lots of differ=
ent types of collections depending on what you need to do with them.  It ma=
y be that a two-dimensional array is what the requirements assume. (But you=
 know what I think about requirement documents.)=20