Posted By

wdso on 06/22/09


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Singleton classes


 / Published in: Ruby
 

  1. # How to define and use a singleton class
  2. # - modifies the class's class
  3. # - instance methods in the singleton class are class methods externally
  4.  
  5. class TheClass
  6. class << self
  7. def hello
  8. puts "hi"
  9. end
  10. end
  11. end
  12.  
  13. # invoke a class method
  14. TheClass.hello # hi

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