    # File lib/RMagick.rb, line 565
        def stroke_dasharray(*list)
            if list.length == 0
                primitive "stroke-dasharray none"
            else
                list.each { |x|
                    if x <= 0 then
                        Kernel.raise ArgumentError, "dash array elements must be > 0 (#{x} given)"
                    end
                }
                primitive "stroke-dasharray #{list.join(',')}"
            end
        end