Rust practice problems

Problem of the day: Derive consistent ordering for versions and priorities

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Showing 50 of 342

Title	Difficulty	Category
Accept string-like values with AsRef	Medium	Primitives
Accessing an owned value while it is borrowed	Medium	Primitives
Accumulate enum variants in a recursive macro	Hard	Primitives
Adding context without anyhow	Hard	Framework
A logical-time reactor: timers without a clock	Hard	End-to-End
A macro-generated FFI binding layer	Hard	End-to-End
A mini DSL: compile-time expression evaluation	Hard	Primitives
any, all, find, position: audit a list of records	Easy	Primitives
Arc: shared ownership across threads	Easy	Primitives
Arrays: the length is part of the type	Easy	Primitives
ASCII search without lowercase copies	Easy	Primitives
A single-producer single-consumer ring buffer	Hard	End-to-End
Associated type or generic parameter?	Hard	Primitives
A store-buffer memory-model interpreter	Hard	Research
Async recursion, async closures, and streams	Hard	Research
Atomics: counters, flags and fetch_*	Medium	Primitives
Balanced ranges: the arithmetic before the threads	Easy	Primitives
Barrier: keeping workers in lock step	Medium	End-to-End
BinaryHeap is a max-heap, and Reverse is the fix	Medium	Primitives
Binding values with @ and or-patterns	Medium	Primitives
Blanket implementations: shared behavior and overlap	Hard	Primitives
`block_on`: poll a future to completion	Easy	Primitives
bool and char	Easy	Primitives
Borrowing through Option	Medium	Primitives
Borrow it or own it: your first lifetime decision	Easy	Primitives
Bounds checks: five safe ways to express access	Hard	End-to-End
Box<dyn Trait>: trait objects, DSTs and dynamic dispatch	Medium	Primitives
Boxed errors and downcasting	Medium	Primitives
BTreeMap range queries	Medium	Primitives
Build a byte index with one allocation	Easy	Primitives
Build a configuration from defaults and overrides	Easy	Primitives
Build a CSV record with one output buffer	Easy	Primitives
Build a generic stack with conditional methods	Medium	Primitives
Build a module tree and inspect its paths	Easy	Primitives
Build a report with a reusable string buffer	Medium	End-to-End
Build a ring buffer with MaybeUninit	Hard	Framework
Build a safe mutable-slice split	Medium	Primitives
Build a spinlock from AtomicBool and UnsafeCell	Hard	End-to-End
Build a test runner that catches panics	Hard	Framework
Build a vector with allocation, push and pop	Hard	Framework
Build `Cell<T>` and `RefCell<T>` from scratch	Hard	Research
Build FizzBuzz strings with an if expression	Easy	Primitives
Build Rc<T> and RefCell<T> from scratch	Hard	End-to-End
Build tree paths with an arena and Rc	Hard	End-to-End
Build vector, pattern-matching and map macros	Medium	Primitives
Calling C functions through safe Rust wrappers	Medium	Framework
Cancelling a future by dropping it	Medium	Framework
Cancel safety, blocking, and locks across `.await`	Hard	End-to-End
Capstone: an async executor with a logical-time reactor	Hard	End-to-End
Capstone: an ownership-only job scheduler	Hard	End-to-End