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From: Rui Maciel <rui.maciel@gmail.com>
Newsgroups: comp.programming
Subject: Re: Generating multi-level associative arrays
Date: Sun, 23 Jun 2013 08:30:53 +0100
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Victor Porton wrote:

> But what is the best way to do this if we want a MULTILEVEL associative
> array? (indexed by first key "a", then by key "b", etc.)
> 
> I want to discuss the most elegant, short, and practical solution for this
> kind of problems.

I don't know if it's the most elegant, but if you wish to have multiple keys 
map to a value then you can resort to a tuple containing both keys as your 
map's key.

That approach is very common.  For example, with the "dictionary of keys" 
matrix data structure, the matrix elements are stored in a key:value pair 
whose key is a (row, column) tuple.


Hope this helps,
Rui Maciel