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  1. a=[]
  2. a<<[]
  3. a<<[1,2]
  4. p a
Success #stdin #stdout 0.01s 8164KB
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Standard input is empty
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[[], [1, 2]]
https://ideone.com/TftNos
language:
Ruby (ruby 2.5.5)
created:
3 days ago
visibility:
public

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