Comparing hashes based on their keys

hash_compare.rb

class Hash
  def same_key_structure?(other)
    return false unless other.is_a?(Hash)
    return false unless self.keys == other.keys
    
    return self.keys.all? do |k|
      if self[k].is_a?(Hash)
        self[k].same_key_structure?(other[k])
      else
        !other[k].is_a?(Hash)
      end
    end
  end
end