Hi,

At Sun, 12 Jun 2005 04:29:27 +0900,
Jamis Buck wrote in [ruby-talk:145177]:
>    class Substring < String
>      def sub!(pat, r=nil, &b)
>        super(pat, r, &b)
         m = eval("proc{$~}", b).call	# get caller's MatchData
>        # --------------------
>        p $1 # -> "ll"
>        # --------------------
         p m[1] # -> "ll"
>      end
>    end

-- 
Nobu Nakada