[RCR] meaningful RUBY_VERSION#<=>

ruby-talk
1

i’m sure something much more elegant could be made, but this summarizes desired
behaviour.

harp:~ > cat a.rb
class RubyVersion < ::String
include Comparable
def <=> other
components <=> RubyVersion::new(other).components
end
def components
scan(%r/\d+/).map{|c| Integer c}
end
def major
components[0]
end
def minor
components[1]
end
def tiny
components[2]
end
module ::Kernel
def RubyVersion *a, &b
RubyVersion::new *a, &b
end
v = $VERBOSE
$VERBOSE = nil
::RUBY_VERSION = RubyVersion(::RUBY_VERSION)
$VERBOSE = v
end
end

p RUBY_VERSION
p RUBY_VERSION > "1.8.3"
p RUBY_VERSION > “1.9.0”

harp:~ > ruby a.rb
"1.8.4"
true
false

kind regards.

-a

···

–
happiness is not something ready-made. it comes from your own actions.

  • h.h. the 14th dali lama
2

matz has said that 1.8.10 (or more generally versions with 2 digits in one
of the components) will not happen. Isn't String#<=> enough? (unless you
absolutely want major, minor & tiny)

On a stock install:

RUBY_VERSION # => "1.8.4"
RUBY_VERSION > "1.8.3" # => true
RUBY_VERSION > "1.9.0" # => false

···

On Fri, Feb 03, 2006 at 05:29:10AM +0900, Ara.T.Howard wrote:

    module ::Kernel
      def RubyVersion *a, &b
        RubyVersion::new *a, &b
      end
      v = $VERBOSE
      $VERBOSE = nil
      ::RUBY_VERSION = RubyVersion(::RUBY_VERSION)
      $VERBOSE = v
    end
  end

  p RUBY_VERSION
  p RUBY_VERSION > "1.8.3"
  p RUBY_VERSION > "1.9.0"

  harp:~ > ruby a.rb
  "1.8.4"
  true
  false

--
Mauricio Fernandez

3

maybe so then - i did not know about the 2 digit restriction. thanks!

-a

···

On Fri, 3 Feb 2006, Mauricio Fernandez wrote:

On Fri, Feb 03, 2006 at 05:29:10AM +0900, Ara.T.Howard wrote:

    module ::Kernel
      def RubyVersion *a, &b
        RubyVersion::new *a, &b
      end
      v = $VERBOSE
      $VERBOSE = nil
      ::RUBY_VERSION = RubyVersion(::RUBY_VERSION)
      $VERBOSE = v
    end
  end

  p RUBY_VERSION
  p RUBY_VERSION > "1.8.3"
  p RUBY_VERSION > "1.9.0"

  harp:~ > ruby a.rb
  "1.8.4"
  true
  false

matz has said that 1.8.10 (or more generally versions with 2 digits in one
of the components) will not happen. Isn't String#<=> enough? (unless you
absolutely want major, minor & tiny)

On a stock install:

RUBY_VERSION # => "1.8.4"
RUBY_VERSION > "1.8.3" # => true
RUBY_VERSION > "1.9.0" # => false

--
happiness is not something ready-made. it comes from your own actions.
- h.h. the 14th dali lama

4

Mauricio Fernandez <mfp@acm.org> writes:

matz has said that 1.8.10 (or more generally versions with 2 digits in one
of the components) will not happen.

Aww... I was really looking forward to ruby 10.0 :frowning: