From: botp <botpena@...>
Date: 2012-07-15T19:32:37+09:00
Subject: Re: What is done by Ruby

>> s=%w(one.example.com two.testing.com three.four.example.com)
> => ["one.example.com", "two.testing.com", "three.four.example.com"]

d="example.com"

>>s.each do |x|
>    p [x,x.reverse.start_with?(d.reverse),x=~/#{d}$/]
> end
....