What's wrong with 2 hashes?

Maybe a HoH is what you need? 

my %bidir= (
  column1 => {
    a => 'b',
  },
  column2 => {
    b => 'a',
  },
);

[download]
So  $a= $bidir{'column2'}->{$b} will give you "the other" value.
s$$([},&%#}/&/]+}%&{})*;#$&&s&&$^X.($'^"%]=\&(|?*{%.+=%;.#_}\&"^"-+%*).}%:##%}={~=~:.")&e&&s""`$''`"e

In reply to Re: Bi-Directional Hash Lookup by Skeeve
in thread Bi-Directional Hash Lookup by PerlingTheUK

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