Lessons
Swift · Expert
Swift · Expert. Ten lessons. Open-book quizzes. Lesson 1 free.
10 lessons · The Host · Lesson 1 free
Pass all ten lessons for the certificate. Sample · Claim
Lesson 1 · On the house
Sendable and data races
Sendable, isolation, why value types help.
Lesson 2
TaskGroup structured concurrency
withTaskGroup / async let patterns.
Lesson 3
Checked continuations
withCheckedContinuation bridging callbacks.
Lesson 4
Global actors and MainActor
@MainActor, isolation hops.
Lesson 5
some vs any
Opaque types vs existentials.
Lesson 6
Result builders
@resultBuilder sketch (language feature — not a SwiftUI course).
Lesson 7
UnsafeBufferPointer sketch
Careful unsafe reads; when NOT to use.
Lesson 8
@objc bridging sketch
@objc, NSObject subclass boundaries.
Lesson 9
Locks and Mutex sketch
OSAllocatedUnfairLock / Mutex — small modern sync primitives.
Lesson 10
Expert capstone
TaskGroup + Sendable + MainActor hop in one small flow.
Sample certificate
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Certificate
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