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P5-tie-hash-regex

Jul 20, 2023

Match hash keys using Regular Expressions

Someone asked on Perlmonks if a hash could do fuzzy matches on keys - this is the result.

If there’s no exact match on the key that you pass to the hash, then the key is treated as a regex and the first matching key is returned. You can force it to leap straight into the regex checking by passing a qr’ed regex into the hash like this

my $val = $hqr/key/;

exists and delete also do regex matching. In the case of delete all values matching your regex key will be deleted from the hash.

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