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  1. class Test
  2. end
  3.  
  4. class Common < Test
  5.   class << self
  6.     attr_reader :state
  7.   end
  8.  
  9.   def test_no_id
  10.     puts "Inside #{self} it is #{self.class.state}"
  11.   end
  12. end
  13.  
  14. class A < Common
  15.   @state = "A"
  16. end
  17.  
  18. class B < Common
  19.   @state = "B"
  20. end
  21.  
  22. A.new.test_no_id
  23. B.new.test_no_id
  24.  
Success #stdin #stdout 0s 4716KB
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stdin
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Standard input is empty
stdout
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Inside #<A:0x89893bc> it is A
Inside #<B:0x8989358> it is B
https://ideone.com/AZ753
language:
Ruby (ruby 2.5.5)
created:
12 years ago
visibility:
public

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