The idea is to produce 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. The input ...

Solving the kata the first time round I used whitebox testing, the second attempt was a mixture of whitebox and blackbox testing and the third attempt a revision of the second. In the first two ...

When working in Sketch, you often add photos to your designs. It could be a photo taken with specialized equipment or a screenshot. The more things you add to your design, the bigger and more complex ...

Abstract: The ability to undo operations is an indispensable feature of editing systems, but supporting group undo in real-time collaborative editing systems is still a difficult problem. We propose ...

Abstract: Workspace awareness is one of the key issues in real-time collaborative editing systems, especially in bitmap-based graphic editing system. Because of the intrinsic characteristics of bitmap ...