As Linus Torvalds, the developer of Linux, once said:
"Bad programmers worry about the code. Good programmers worry about data structures and their relationships."
What he means is that well-designed data structures make the code very easy to design, maintain, and scale up. In contrast, if you start with a poor data structure, you can't make up for that, even with the best of code.
Start with a good data structure and your code will naturally be more simple, elegant, and easy to maintain.
With that in mind, let's try to decide on a suitable data structure for our program. Go back and take a look at the previous screenshot (under the Getting started section). What kind of data structure, do you think, would be needed to capture all the necessary fields of information?
Well, first of all our drum machine needs to keep information...
