From: Paul Brannan <pbrannan@...>
Date: 2003-11-27T06:40:52+09:00
Subject: Re: raise unless RUBY_VERSION[%r/^\s*\d+\.\d+/o].to_f >= 1.8

On Tue, Nov 25, 2003 at 08:32:14AM +0900, Ara.T.Howard wrote:
> any better methods of require a specific version/set of versions?

require 'rbconfig'

major = Config::CONFIG['MAJOR'].to_i
minor = Config::CONFIG['MINOR'].to_i
teeny = Config::CONFIG['TEENY'].to_i
if major < 1 or (major == 1 and minor < 8) then
  raise "wrong version"
end

Of course, this can be wrapped into a nice version class.  I wrote one
of these a long time ago and never released it, but there are plenty of
others already out there.

Paul