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  1. require 'set'
  2.  
  3. a1 = Set[3,6,4]
  4. a2 = Set[1,2,3,4,5,6,7,8,9]
  5.  
  6. puts a1.subset?(a2)
Success #stdin #stdout 0.01s 4892KB
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stdin
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Standard input is empty
stdout
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true
https://ideone.com/ncjMI
language:
Ruby (ruby 2.5.5)
created:
12 years ago
visibility:
secret

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