Dart · Expert

Lesson 1 · On the house

The event loop: microtasks and events

Microtask queue before event queue, scheduleMicrotask, and ordering puzzles.

Lesson 2

Zones and uncaught errors

runZonedGuarded, zone values, and intercepting print and timers.

Lesson 3

Class modifiers

base, interface, final, sealed, and mixin class — controlling reuse across libraries.

Lesson 4

Extension types

Zero-cost wrappers over a representation type, and when to choose them.

Lesson 5

Futures in depth

Completer, Future.any, timeouts, error propagation, and unawaited futures.

Lesson 6

Long-lived isolates and ports

Isolate.spawn, SendPort/ReceivePort handshakes, and worker shutdown.

Lesson 7

FFI with dart:ffi

DynamicLibrary, lookupFunction, native types, and memory with calloc.

Lesson 8

Type promotion and soundness

Flow analysis, why fields do not promote, covariant, and dynamic boundaries.

Lesson 9

Stream controllers and back-pressure

StreamController, onListen/onPause/onCancel, broadcast, and transformers.

Lesson 10

AOT, JIT and performance

dart compile exe, JIT vs AOT trade-offs, const canonicalization, and profiling.