As you want to output the whole line there is really no need to capture anything with brackets. Just print the entire line if it ends with a nuber:

perl -ne 'print if /\d$/'

print will print $_ by default
/\d$/ will matche if $_ ends with a number (in good Perl golf spirit there is no need to use \d+ there: 1 digit is enough and we don't want to capture the number as we output the entire line).

An other slightly more cryptic way of writing it would be perl -ne '/\d$/ && print' but it's the same length, so no bonus point in Perl golf.

In reply to Re: regular expression by mirod
in thread Matching lines in a file that end in numbers (was: regular expression) by ashok

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