Swift · Expert

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.