Welcome to Object-Oriented Programming
Object-Oriented Programming, or "OOP", is a pattern for (allegedly) writing clean and maintainable code.
Admittedly, not everyone agrees that object-oriented programming is the best way to write code, but, to be a good engineer, you should at least understand it.
Throughout this course, we'll be coding small bits of a real-time strategy game called "Age of Dragons". Players control armies of humans, elves, orcs, and dragons in top-down battles. It's similar to Age of Empires or StarCraft.
Assignment
One of the greatest sins when trying to write "clean code" is using misleading variable and function names. Take a look at the destroy_wall function. It takes a list of numbers as input (each representing the health of a wall) and returns a new list with each entry of 0 or less removed.
Based on its name, you might assume that destroy_wall destroys a single wall, but if you look closely, you'll see that it handles multiple walls.
After passing the tests, take a look at the solution to see how we named everything.