Print only the matching group in Perl
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Print only the matching group in Perl by 
Ciro Santilli 34 Updated 2024-12-15 +Created 1970-01-01
Ciro Santilli 34 Updated 2024-12-15 +Created 1970-01-01stackoverflow.com/questions/5617314/perl-regex-print-the-matched-value/5617355#5617355
perl -lne 'print for /mykey=(\d+)/'