Module: ActiveSupport::CoreExtensions::Range::IncludeRange

Included in:
Range
Defined in:
lib/gems/activesupport-2.2.2/lib/active_support/core_ext/range/include_range.rb

Overview

Check if a Range includes another Range.

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object

:nodoc:



6
7
8
 
# File 'lib/gems/activesupport-2.2.2/lib/active_support/core_ext/range/include_range.rb', line 6

def self.included(base) #:nodoc:
  base.alias_method_chain :include?, :range
end

Instance Method Details

#include_with_range?(value) ⇒ Boolean

Extends the default Range#include? to support range comparisons.

(1..5).include?(1..5) # => true
(1..5).include?(2..3) # => true
(1..5).include?(2..6) # => false

The native Range#include? behavior is untouched.

("a".."f").include?("c") # => true
(5..9).include?(11) # => false

Returns:

  • (Boolean) 


18
19
20
21
22
23
24
25
26
 
# File 'lib/gems/activesupport-2.2.2/lib/active_support/core_ext/range/include_range.rb', line 18

def include_with_range?(value)
  if value.is_a?(::Range)
    operator = exclude_end? ? :< : :<=
    end_value = value.exclude_end? ? last.succ : last
    include?(value.first) && (value.last <=> end_value).send(operator, 0)
  else
    include_without_range?(value)
  end
end