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Execute an instance method of Object and call in its block instance methods of another object

/ Published in: Ruby
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  1. # encoding: utf-8
  2.  
  3. module ObjectExtensions
  4.   def execute(&block)
  5.     Extension.new.execute(&block)
  6.   end
  7. end
  8.  
  9. class Extension
  10.   def execute(&block)
  11.     self.instance_eval(&block)
  12.   end
  13.  
  14.   def one;    puts 'one'   end
  15.   def two;    puts 'two'   end
  16.   def three;  puts 'three' end
  17. end
  18.  
  19. Object.__send__(:include, ObjectExtensions)
  20.  
  21. one   rescue puts 'boom!'       #=> boom!
  22. two   rescue puts 'boom too!'   #=> boom too!
  23. three rescue puts 'boom three!' #=> boom three!
  24.  
  25. execute do
  26.   one   #=> one
  27.   two   #=> two
  28.   three #=> three
  29.   four rescue puts 'boom four!' #=> boom four!
  30. end

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