means add a parallel "%Field_B_Resolver"

Why a parallel hash? Why not just preload one hash with both values:

$resolver{ {lc("$External_A|$External_B") } = [ Internal_A, Internal_B
+ ];

[download]

And retrieve they together.

Or if the table is large and space is tight:

$resolver{ {lc("$External_A|$External_B") } = "Internal_A Internal_B";

[download]

And split them for use.

But using a "two strings smacked together" key just seems wrong.

Again why? Composite keys are a perfectly natural solution used in all manner of DB/dataretreival mechanisms.

You could use nested hashes $resolver{ External_A }{ External_B}.

But if the code is working as is, I'd want a reason (beyond is "seeming wrong") before I'd change it.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

The start of some sanity?

In reply to Re: A question of style: Composite keys to multiple values by BrowserUk
in thread A question of style: Composite keys to multiple values by Voronich

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