From: Robert Klemme <bob.news@...>
Date: 2006-03-25T06:53:53+09:00
Subject: Re: require a certain version of the ruby interpreter

Shea Martin wrote:
> This works nicely, but I am sure something like this is already built 
> in, but I can't seem to find it.
> 
> def require_version( p_ver_str )
>   l_have = VERSION.split('.')
>   l_need = p_ver_str.split('.')
>   l_need.each_index do |i|
>     if l_have[i].to_i < l_need[i].to_i
>       raise ScriptError, "Required Ruby #{p_ver_str}, found Ruby 
> #{VERSION}"
>     end
>   end
> end

Hmmm, lettsee whether we can compress that a bit. How about:

def ensure_version(ver)
   raise "Requiring at least #{ver}" unless
     RUBY_VERSION.scan(/d+/).map! {|x|x.to_i} >=
        ver.scan(/d+/).map! {|x|x.to_i}
end

Not really a one liner...

	robert