method

subset?

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subset?(set) public

Returns true if the set is a subset of the given set.

# File lib/set.rb, line 204
  def subset?(set)
    set.is_a?(Set) or raise ArgumentError, "value must be a set"
    return false if set.size < size
    all? { |o| set.include?(o) }
  end

subset?

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