From: come <come.news@...>
Date: 2007-04-27T17:30:14+09:00
Subject: Re: Output A File w/ Line Numbers?

another way, but maybe less "ruby way" and more "perl way" :

ruby -ne 'print "#{$.} : #{$_}"' file


>
> ruby -ne 'BEGIN{$n=0}; print "#{$n+=1} "; print' junk