Class: NullClass

Inherits:
Object show all
Defined in:
lib/standard/facets/nullclass.rb

Overview

Nullclass

NullClass is essentially NilClass but it differs in one important way. When a method is called against it that it deoesn’t have, it will simply return null value rather then raise an error.

TODO: Perhaps NullClass should be called NackClass?

Class Method Summary collapse

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(sym, *args) ⇒ Object 



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# File 'lib/standard/facets/nullclass.rb', line 20

def method_missing(sym, *args)
  return nil if sym.to_s[-1,1] == '?'
  self
end

Class Method Details

.new ⇒ Object 



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# File 'lib/standard/facets/nullclass.rb', line 12

def new
  @null ||= NullClass.allocate
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/standard/facets/nullclass.rb', line 19

def [](key); nil; end

#inspect ⇒ Object 



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# File 'lib/standard/facets/nullclass.rb', line 16

def inspect ; 'null' ; end

#nil? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/standard/facets/nullclass.rb', line 17

def nil?  ; true ; end

#null? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/standard/facets/nullclass.rb', line 18

def null? ; true ; end