Determine ruby version from within Rails

Question

Is there a way to determine what version of Ruby is running from within Rails (either on the web or through script/console)? I have Ruby 1.8.6 installed but I\'

Answer 1

Use RUBY_VERSION as mentioned by others.

You can then use Gem::Version to do version string comparison:

require 'rubygems' # Only needed for ruby pre-1.9.0 but it's safe for later versions (evaluates to false).
if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('1.9.0')
    extend DL::Importable                                    
else                                                         
    extend DL::Importer                                      
end