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Class: NilClass

Instance Attribute Summary

Instance Method Summary

Instance Attribute Details

#blank? ⇒ true (readonly)

nil is blank:

nil.blank? # => true
[ GitHub ] 

  


# File 'activesupport/lib/active_support/core_ext/object/blank.rb', line 56



def blank?
  true
end


  








  

    #present?  ⇒ Boolean  (readonly)
  

  

    This method is for internal use only.
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/core_ext/object/blank.rb', line 60



def present? # :nodoc:
  false
end


  







Instance Method Details



  

    #as_json(options = nil)  
  

  

    This method is for internal use only.
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/core_ext/object/json.rb', line 93



def as_json(options = nil) # :nodoc:
  self
end


  








  

    #to_param  
  



  

    

Returns self.


  



  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/core_ext/object/to_query.rb', line 20



def to_param
  self
end


  








  

    #try  
  



  

    

Calling try on nil always returns nil. It becomes especially helpful when navigating through associations that may return nil.



nil.try(:name) # => nil



Without try



@person && @person.children.any? && @person.children.first.name



With try



@person.try(:children).try(:first).try(:name)


  



  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/core_ext/object/try.rb', line 148



def try(*)
  nil
end


  








  

    #try!  
  



  

    

Calling try! on nil always returns nil.



nil.try!(:name) # => nil


  



  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/core_ext/object/try.rb', line 155



def try!(*)
  nil
end