An example bitmap manipulation to that implements 8 simple commands to manipulate bitmap images.

• I M N - Create a new M x N image with all pixels coloured white (O).
• C - Clears the table, setting all pixels to white (O).
• L X Y C - Colours the pixel (X,Y) with colour C.
• V X Y1 Y2 C - Draw a vertical segment of colour C in column X between rows Y1 and Y2 (inclusive).
• H X1 X2 Y C - Draw a horizontal segment of colour C in row Y between columns X1 and X2 (inclusive).
• S - Show the contents of the current image
• ? - Displays help text
• X - Terminate the session

To run the program just run runner.rb

To run the tests just run rspec in the route folder

The application is mainly structured as follows:

• BitmapEditor - basic controller class that parses commands
• Bitmap - basic model class that stores/manipulates state of image

Coordinates start at 1,1 being the top left

Maximum width or height is 250 pixels

I have not added it as a dependancy, but have used rubocop and followed most of its reccomendations.

There are a few places where I could potentially remove some duplication (for example the validation methods in bitmap) but having tried this I felt it decreased the readability for a relitivly small gain in reducing duplication.

I have kept the basic structure from the example application. If the application was to be much more complex I would probably redesign this and separate the main run loop into a separate class. This would make it easier to test.