From: 7stud -- <lists@...>
Date: 2012-09-21T14:06:40+09:00
Subject: Re: How would you allow variable from specific list of Fixnum?

class ModeError < Exception
end


class Dog
  @modes = [1, 4, 17, 20]

  def self.modes
    @modes
  end

  def initialize(type=nil, location=nil, mode=17)
    raise ModeError if not self.class.modes.include?(mode)
  end
end

Dog.new('x', 'y', 21)

--output:--
1.rb:13:in `initialize': ModeError (ModeError)
  from 1.rb:17:in `new'
  from 1.rb:17:in `<main>

-- 
Posted via http://www.ruby-forum.com/.