From: sabbyxtabby@... (Sabby and Tabby)
Date: 2003-11-26T05:07:11+09:00
Subject: Re: raise unless RUBY_VERSION[%r/^\s*\d+\.\d+/o].to_f >= 1.8

"Ara.T.Howard" <ahoward@ngdc.noaa.gov> wrote:

> On Tue, 25 Nov 2003, Gennady wrote:
> 
> > > On Tue, 25 Nov 2003, Florian Gross wrote:
> > >
> > >> What about RUBY_VERSION >= "1.8.0"?
> > 
> > It does not work as a general solution, as "1.11.0" < "1.8.0".
> 
> ah yes - _did_ think of that at one point.  must have drank more coffee that
> day.  thatnks for the heads up.  definitely best to stick with a 'to_f' type
> impl for now.

Unfortunately, 'to_f' suffers the same problem, since 1.11 < 1.8.
Numerically compare each part of version string:

  require 'scanf.rb'
  raise unless (RUBY_VERSION.scanf("%d.%d.%d") <=> [1,8]) >= 0