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  1. module Functional
  2.   def filter
  3.   end
  4. end
  5.  
  6. class Array
  7.   include Functional
  8.   def filter
  9.   end
  10. end
  11.  
  12. a = [1, -2, 3, 7, 8]
  13. puts a.filter{|x| x>0}.inspect      # ==>Prints out positive numbe
Success #stdin #stdout 0.02s 7408KB
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https://ideone.com/KRvXTR
language:
Ruby (ruby 2.5.5)
created:
10 years ago
visibility:
public

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