A Ruby 2.3 program that simulates a basic interactive bitmap editor. Bitmaps are represented as an M x N matrix of pixels with each element representing a colour.

There are 6 supported commands:

• I N M - 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

Command reference files can be found in examples/valid folder.

• ruby 2.3.4 (Can be downloaded from https://www.ruby-lang.org/en/downloads/ or with RVM https://rvm.io/)
• bundler (run gem install bundler to get the latest version of bundler)

>bin/bitmap_editor examples/show.txt

• bundle exec rspec
• Run tests in verbose mode (with group and example names): bundle exec rspec -f d