rust · beginner

Rust: Zero to Hero

Start with no Rust at all and finish having used the language. Each stage is a small function or a tiny project, graded by cargo test in a sandbox with no network.

0 of 35 stages passed. Copy courses/rust-zero-to-hero/starter and work through the map. The reference solution used by CI is not what you submit.

1. Getting started

   01Hello, CargoWrite your first function and see Cargo run the hidden tests.Free
2. 02Variables and mutabilityBind names, change them only when they are mut, and shadow a binding.Free

3. Types

   03Scalar typesWork with integers, floats, chars, and bools, including wrapping arithmetic.Free
4. 04Tuples and arraysGroup a fixed handful of values in a tuple or a fixed-size array.Free

5. Control

   05FunctionsPass a function pointer and compute a factorial.Locked
6. 06Control flowBranch with if and match, and loop until a condition breaks.Locked

7. Project: guessing game

   07Guessing gameJudge guesses against a secret number and count the attempts.Locked

8. Ownership

   08OwnershipMove a String into a function, give one back, and clone when you must keep both.Locked
9. 09Borrowing and referencesRead through a shared reference and update through a mutable one.Locked
10. 10SlicesView part of a string or an array without taking ownership.Locked

11. Data

    11StructsGroup named fields and add methods with impl.Locked
12. 12Enums and pattern matchingModel a direction and a message, and match every variant.Locked

13. Errors

    13Option and ResultRepresent a missing value and a failure without panicking.Locked
14. 14The question mark and custom errorsReturn your own error type and propagate it with `?`.Locked

15. Project: dungeon

    15Dungeon crawlerMove between two rooms and pick up the key.Locked

16. Organization

    16Modules and cratesSplit a shop into a module and re-export its item type.Locked

17. Collections

    17Vec and StringOwn a growable list of strings and join them.Locked
18. 18HashMapCount words and pick the one that appears most often.Locked

19. Project: todo list

    19Todo listAdd tasks, toggle them, and save the list to a file.Locked

20. Abstraction

    20GenericsWrite one function and one struct that work for many types.Locked
21. 21TraitsDefine shared behavior and accept anything that implements it.Locked
22. 22Trait objectsPut different types behind one `&dyn` reference.Locked
23. 23LifetimesName how long a borrowed result stays valid.Locked

24. Project: mini grep

    24Mini grepFind lines that contain a query, with and without case.Locked

25. Functional

    25ClosuresPass behavior that can capture its environment.Locked
26. 26IteratorsTransform a sequence without an index loop.Locked

27. Project: calculator

    27CalculatorEvaluate integer expressions with precedence and parentheses.Locked

28. Pointers

    28Box and RcPut a list on the heap and share an owned String.Locked
29. 29RefCell and ArcMutate through a shared reference and share that cell across owners.Locked

30. Concurrency

    30Threads and channelsSplit work onto a thread and pass values through a channel.Locked

31. Project: job pool

    31Job poolRun squaring jobs on a fixed set of worker threads.Locked

32. Beyond

    32Async basicsWrite async functions the grader can poll to completion.Locked
33. 33MacrosGenerate a Vec of Strings with macro_rules!.Locked
34. 34TestingPractice the assertions the grader uses on your functions.Locked
35. 35Unsafe and FFICheck a boundary in safe code, then call a tiny unsafe block and an extern C function.Locked