From: "Peña, Botp" <botp@...>
Date: 2008-11-10T13:41:12+09:00
Subject: Re: about regexp...

From: Kyung won Cheon [mailto:kdream95@gmerce.co.kr] 
# >> "aaabbxccc".sub(/bb(.)c/, "\\1.upcase")
# => "aaax.upcasecc"  # I expect 'aaaXcc'

consider,

> "\\1.upcase"
=> "\\1.upcase"

> "\\1".upcase
=> "\\1"


try,

 "aaabbxccc".sub(/bb(.)c/) {$1.upcase}