Hands-On Design Patterns and Best Practices with Julia

Our use case – a space war game

Throughout this chapter, we will illustrate programming concepts by building parts of a space war game. The design of the game is very simple and straightforward. It consists of game pieces such as spaceships and asteroids that are scattered around a two-dimensional grid. These game pieces are called widgets in our program.

Let's first define our data types as follows:

# Space war game!mutable struct Position    x::Int    y::Intendstruct Size    width::Int    height::Intendstruct Widget    name::String    position::Position    size::Sizeend

As data types are central to our design, this warrants a little more explanation:

• The Position type is used to store the coordinates of a game piece. It is represented by two integers: x and ...