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  1. nums = {a: 1, b: 2, c: 3, d: 4, e: 5}
  2.  
  3. nums.select! { |_, val| val.even? }
  4.  
  5. p nums
Success #stdin #stdout 0.06s 9656KB
comments (?)
stdin 
Standard input is empty
stdout 
{:b=>2, :d=>4}
https://ideone.com/Z84zqk
language:
Ruby (ruby 2.5.5)
created:
7 years ago
visibility:
public

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