May 26, 2018
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.