🦀Rust's Ownership Model
Build a working mental model of Rust's ownership system — from stack vs heap intuition through borrow checker mastery — so you can read and write Rust without fighting the compiler.
Phase 1Ownership from Scratch
Stack, heap, and what moving really means
Every value lives somewhere — stack or heap
6 minEvery value lives somewhere — stack or heap
Assignment doesn't copy — it transfers ownership
6 minAssignment doesn't copy — it transfers ownership
Borrow the book, don't photocopy the library
7 minBorrow the book, don't photocopy the library
When the owner dies, the value dies with it
7 minWhen the owner dies, the value dies with it
Phase 2Borrow Checker Drills
Fix broken snippets and decode compiler errors
Passing a value to a function is a move
6 minPassing a value to a function is a move
Two mutable references and the compiler says no
7 minTwo mutable references and the compiler says no
You can't return a reference to a local variable
6 minYou can't return a reference to a local variable
Your struct owns its fields — or borrows trouble
7 minYour struct owns its fields — or borrows trouble
Read the error, then read it again — the fix is in there
6 minRead the error, then read it again — the fix is in there
Phase 3Patterns in the Wild
Lifetimes, RAII, and real-world ownership patterns
Your function returns a reference — whose data is it borrowing?
7 minYour function returns a reference — whose data is it borrowing?
Your MutexGuard unlocked itself — on purpose
7 minYour MutexGuard unlocked itself — on purpose
When one owner isn't enough — Rc, Arc, and shared ownership
7 minWhen one owner isn't enough — Rc, Arc, and shared ownership
Clone is explicit effort — Copy is the compiler being generous
6 minClone is explicit effort — Copy is the compiler being generous
Phase 4Refactor a Linked List
Refactor a linked list past the borrow checker
Build a linked list that the borrow checker approves
8 minBuild a linked list that the borrow checker approves
Frequently asked questions
- Why does Rust move values instead of copying them?
- This is covered in the “Rust's Ownership Model” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- What's the difference between &T and &mut T?
- This is covered in the “Rust's Ownership Model” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- When should I use Rc or Arc instead of plain ownership?
- This is covered in the “Rust's Ownership Model” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- How do lifetimes relate to ownership?
- This is covered in the “Rust's Ownership Model” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- Can I just use clone() everywhere to avoid the borrow checker?
- This is covered in the “Rust's Ownership Model” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
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