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From: Jacob Sparre Andersen <jacob@jacob-sparre.dk>
Newsgroups: comp.lang.ada
Subject: Re: Arrays, slices, case, and =?windows-1252?B?kWlukg==?=
 strategies
Date: Sat, 30 Dec 2017 09:34:41 +0100
Organization: JSA Research & Innovation
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Date: 2017-12-30T09:34:41+01:00
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Mace Ayres wrote:

[ A problem description which sound very much like a part of a Sudoku
  solver. :-) ]

You could make the two dimensional array a container with three
different iterators, one for iterating over a selected column, one for
iterating over a selected row, and one for iterating over a block.

Greetings,

Jacob
-- 
»Saving keystrokes is the job of the text editor, not the
 programming language.«                    -- Preben Randhol