What is an actor and how does it prevent data races
WHAT IT TESTS: Actor isolation as compiler-enforced safety. OUTLINE: Actors serialize access to mutable state, reachable only via await; compiler blocks unsafe access. Token-refresh actor coalesces concurrent refreshes.
WHAT IT TESTS: Whether you understand actor isolation versus manual synchronization. ANSWER OUTLINE: An actor protects its mutable state by allowing only one task inside at a time; cross-actor access requires await, and the compiler enforces this at build time rather than relying on discipline. Unlike locks you can forget, actors make data races a compile error. A token actor serializes reads and writes of the current token and coalesces concurrent refreshes into one.
Read the original → interview
- #ios
- #swift
- #concurrency
- #actors
- #data-races
Get five bites like this every day.
Tezvyn delivers a daily feed of 60-second tech bites with quizzes to lock in what you learn.