vendor/rails/activesupport/lib/active_support/core_ext/range/include_range.rb

   1 module ActiveSupport #:nodoc:
   2   module CoreExtensions #:nodoc:
   3     module Range #:nodoc:
   4       # Check if a Range includes another Range.
   5       module IncludeRange
   6         def self.included(base) #:nodoc:
   7           base.alias_method_chain :include?, :range
   8         end
   9
  10         # Extends the default Range#include? to support range comparisons.
  11         #  (1..5).include?(1..5) # => true
  12         #  (1..5).include?(2..3) # => true
  13         #  (1..5).include?(2..6) # => false
  14         #
  15         # The native Range#include? behavior is untouched.
  16         #  ("a".."f").include?("c") # => true
  17         #  (5..9).include?(11) # => false
  18         def include_with_range?(value)
  19           if value.is_a?(::Range)
  20             operator = exclude_end? ? :< : :<=
  21             end_value = value.exclude_end? ? last.succ : last
  22             include?(value.first) && (value.last <=> end_value).send(operator, 0)
  23           else
  24             include_without_range?(value)
  25           end
  26         end
  27       end
  28     end
  29   end
  30 end