Welcome to Day 2

Now that we have seen a fair amount of Rust, we will continue with:

• Structs, enums, methods.
• Pattern matching: destructuring enums, structs, and arrays.
• Control flow constructs: if, if let, while, while let, break, and continue.
• The Standard Library: String, Option and Result, Vec, HashMap, Rc and Arc.
• Modules: visibility, paths, and filesystem hierarchy.