array_inquirer.rb

class ArrayInquirer < Array
private
  def method_missing method, *args
    begin
      any? { |elem| elem.to_s == method[0..-2] }
    rescue NoMethodError
      super method, *args
    end
  end
end

module ArrayInquiry
  def inquiry
    ArrayInquirer.new(self)
  end
end
Array.send(:include, ArrayInquiry)

# ["code", "brahma"].inquiry.code? => true
# ["code", "brahma"].inquiry.brahma? => true
# ["code", "brahma"].inquiry.really? => false