http://www.perlmonks.org?node_id=1045616


in reply to Re^2: extract line
in thread extract line

$1, $2 (and $3, ..., etc.) hold the data that has been captured by a regular expression. This is fairly basic stuff, so perhaps a read of the perlretut - Perl regular expressions tutorial would be useful; it's section "Extracting matches" has a better, and more detailed, description than my one sentence.

-- Ken