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Jun 20th, 2018
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  1. class Array
  2.  
  3. def sum
  4.  
  5. self.reject { |i| !(i.is_a?(Integer) || i.is_a?(Float)) }.inject(0) { |a,sum| sum += a }
  6.  
  7. end
  8.  
  9. end
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