From: Dan Doel <djd15@...>
Date: 2003-11-26T06:56:07+09:00
Subject: Re: Range does not take an Range object.

class Range
    alias_method :old_include?, :include?
   
    def include?(obj)
        if obj.is_a? Range
            old_include? obj.first and
            old_include? obj.last
        else
            old_include? obj
        end
    end
   
    def intersect?(aRange)
        aRange.each do |i|
            return true if include? i
        end
       
        false
    end
end

p (1..4).include? 2..3

p (1...4).include? 1..4

p (1..6).intersect? 4..8

p (1...6).intersect? 6..8