Enums--or enumerated types--in Swift have been around for a long time, but I never truly explored their potential until I stumbled across an article explaining that "enums can define any hierarchically organized data." So I decided to try using enums, not as I had traditionally used them, but as...

We consider optimization every day of our lives. We always want to take the route that will get us to work the fastest, accomplish as many tasks as possible on time based on priority, and so on. Optimization means finding the solution (or solutions) for a problem that produces a result that cannot...