Shape Your Data: Structs, Enums, Pattern Matching

Your learning sequence

1. 1 Not solved yet.○ Structs: naming your data Practice · Easy
2. 2 Not solved yet.○ Field init shorthand and struct update syntax Practice · Easy
3. 3 Not solved yet.○ Convert distances with tuple and unit structs Practice · Easy
4. 4 Not solved yet.○ impl blocks: associated functions, methods, Self and associated constants Practice · Easy
5. 5 Not solved yet.○ Replace a manual default with a derive Practice · Easy
6. 6 Not solved yet.○ Represent commands with enum variants Practice · Easy
7. 7 Not solved yet.○ match and exhaustiveness: the compiler as a checklist Practice · Easy
8. 8 Not solved yet.○ The wildcard trap: _ arms freeze your enum against the future Practice · Medium
9. 9 Not solved yet.○ Literal, range and or-patterns Practice · Easy
10. 10 Not solved yet.○ Binding values with @ and or-patterns Practice · Medium
11. 11 Not solved yet.○ Destructuring structs and nested patterns Practice · Medium
12. 12 Not solved yet.○ Slice and array patterns, and rest @ .. Practice · Medium
13. 13 Not solved yet.○ Grade scores with match guards Practice · Medium
14. 14 Not solved yet.○ Refutability, and every place a pattern can appear Practice · Medium
15. 15 Not solved yet.○ Simplify stack control flow with pattern matching Practice · Easy
16. 16 Not solved yet.○ Combine pattern matches with let-chains Practice · Medium
17. 17 Not solved yet.○ Count enum variants with matches! Practice · Easy
18. 18 Not solved yet.○ #[derive(Debug)] and the three shapes of debug output Practice · Easy
19. 19 Not solved yet.○ Compare weighted records without requiring Eq Practice · Medium
20. 20 Not solved yet.○ Derive consistent ordering for versions and priorities Practice · Medium
21. 21 Not solved yet.○ Make hashing agree with equality Practice · Medium
22. 22 Not solved yet.○ Build a configuration from defaults and overrides Practice · Easy
23. 23 Not solved yet.○ Decode bytes into enum variants Practice · Medium
24. 24 #[non_exhaustive]: designing enums you can extend later Read
25. 25 Not solved yet.○ Protect rectangle invariants with private fields Practice · Easy
26. 26 Choose what belongs in a struct or enum Read

use std::mem::size_of;

fn main() {
    println!("Option<Box<u8>>: {}", size_of::<Option<Box<u8>>>());
    println!("Box<u8>: {}", size_of::<Box<u8>>());
    println!("Option<u8>: {}", size_of::<Option<u8>>());
}