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  1. def del_list(list)
  2. 	list.inject({}) { |hash, (id, alfa)|
  3. 		hash.merge(id => alfa) { |key, self_val, other_val|
  4. 			if self_val then
  5. 				self_val
  6. 			else
  7. 				if other_val then
  8. 					other_val
  9. 				else
  10. 					nil
  11. 				end
  12. 			end
  13. 		}
  14. 	}.to_a
  15. end
  16.  
  17.  
  18. LIST = [[1, "a"], [1, nil], [2, "b"], [3, "b"], [4, "b"], [4, nil], [4, nil], [5, nil]]
  19.  
  20. p del_list(LIST)
Success #stdin #stdout 0s 29112KB
comments (?)
stdin 
Standard input is empty
stdout 
[[1, "a"], [2, "b"], [3, "b"], [4, "b"], [5, nil]]
https://ideone.com/ofrBaY
language:
Ruby (ruby 2.5.5)
created:
7 years ago
visibility:
public

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