The has is only an example, a demonstration of a broader concept. I tried to make it as simple as possible, but often this approach is used to hide more complex data structures than plain hashes. For example, I was referring to HoAoHs or something like that.

It's OK to use hashes directly. It's not OK, IMHO to use HoAoHs directly, but better abstract this usage away.

Even in the small example I presented, the implementer of the binding abstraction may decide that (for some reason) it will be better done with an array or a tree (perhaps the typical data will make it more efficient). The abstraction allows to hide it from the "user code".

In reply to Re^2: Using functional abstraction in Perl by spurperl
in thread Using functional abstraction in Perl by spurperl

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