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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 69



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 73



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 94



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 27



def to_param
  self
end


  








  

    #to_query(key)  
  



  

    
Returns a CGI-escaped key.

  



  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/core_ext/object/to_query.rb', line 22



def to_query(key)
  CGI.escape(key.to_param)
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


</code>


With try


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

  



  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/core_ext/object/try.rb', line 179



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 188



def try!(*, &)
  nil
end