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  1. class A
  2.   FOOBAR = 42
  3. end
  4.  
  5. class B < A
  6.   class << self
  7.     def case_1
  8.       FOOBAR # <<< how to fix this?
  9.     end
  10.  
  11.     def case_2
  12.       self::FOOBAR # <<< is this the proper way of doing it? / what does that do exactly?
  13.     end
  14.   end
  15.  
  16.   def case_3
  17.     FOOBAR # cool
  18.   end
  19.  
  20.   def self.case_4
  21.     FOOBAR # cool
  22.   end
  23. end
  24.  
  25. # puts B.case_1 # => uninitialized constant Class::FOOBAR (NameError)
  26.  
  27. puts B.case_2
  28. puts B.new.case_3
  29. puts B.case_4
Success #stdin #stdout 0.01s 7412KB
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Standard input is empty
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42
42
42
https://ideone.com/vifbLy
language:
Ruby (ruby 2.5.5)
created:
10 years ago
visibility:
public

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