my $circuit_id = ( $if_descr =~ /([^.]*)(?:\.(.*))?/
   ? $1 . (defined($2) ? $2 : '')
   : undef
);

[download]
But it can be shortened to 
(my $circuit_id = $if_descr) =~ s/\.//;

[download]

In reply to Re: regexp help -- grab almost a whole string by ikegami
in thread regexp help -- grab almost a whole string by tdruttenberg

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