Class: NilClass

Inherits:
Object show all
Defined in:
lib/range_extd/nil_class.rb

Overview

Adds a couple of methods in NilClass and modifies the behaviour == slightly so that it returns true for nil-equivalent objects if they return true for nil?

In default, it seems the judgement is based on other.__id__. Note that the method eql? (and of course equal?) unchange.

Here is the summary of the changes:

  • #nowhere? is added, which returns false.

  • #class_raw is added, which returns NilClass

  • (nil == RangeExtd::Nowhere::NOWHERE) returns true

To activate these features, explicitly do either of the following

require "range_extd/nil_class"
require "range_extd/load_all"

Instance Method Summary collapse

Instance Method Details

#==(other) ⇒ Boolean

returns true if other returns true with nil?.

Returns:

  • (Boolean) 


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# File 'lib/range_extd/nil_class.rb', line 37

def ==(other)
  other.nil?
end

#class_raw ⇒ Class

Identical to nil.class

Returns:

  • (Class) 


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# File 'lib/range_extd/nil_class.rb', line 28

def class_raw
  self.class
end

#double_equals? ⇒ Object

No overwriting.



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# File 'lib/range_extd/nil_class.rb', line 32

alias_method :double_equals?, :==

#nowhere? ⇒ Boolean

returns true

Returns:

  • (Boolean) 


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# File 'lib/range_extd/nil_class.rb', line 21

def nowhere?
  false
end