Hands-On Design Patterns and Best Practices with Julia

Enforcing type consistency in using parameters 

One of the most useful features with type parameters is that they can be used to enforce type consistency.

Let's say we want to create a new function that groups two Thing objects together. As we don't really care about what concrete types are passed, we can just write a single function that does the work:

function group_anything(A::Thing, B::Thing)    println("Grouped ", A, " and ", B)end

We can also run some trivial tests quickly to ensure that all four combinations of spaceships and asteroids are working:

You may wonder how we get such a nice output regarding the specific weapons. As we have ...