| name | dart |
| description | Dart programming language — isolates, streams, futures, null safety, records and patterns, FFI, pub package manager, and Flutter integration. |
| trigger | dart, dart lang, dart ffi, dart futures, dart isolates, dart streams, pub, dart convert, dart io, dart async |
Dart
Isolates
Dart uses isolates for concurrency — independent workers with their own memory heap. Communicate via SendPort / ReceivePort message passing. No shared state, no data races.
Asynchronous: Futures and Streams
Futures represent single async values with .then() and async/await. Streams emit sequences of values over time, supporting listen(), map(), where(), and async* generators.
Null Safety
Sound null safety is enforced at compile time. Types are non-nullable by default. Use ? for nullable types, late for delayed initialization, and ! for null assertion.
Records and Patterns
Records are lightweight anonymous data aggregates ((name, age)). Patterns enable destructuring in variable declarations, switch expressions, and collection matching.
Dart FFI
dart:ffi provides C-language interop. Define native types, call external functions, manage memory manually. Supports ABI-specific types and handle-based APIs.
Pub Package Manager
pub add, pub get, pub publish. Packages hosted on pub.dev. Supports semantic versioning, lockfiles, and workspace-style packages.
Flutter Integration
Dart is the language of Flutter. Key libraries like dart:ui, package:flutter/material.dart, and platform channels are designed around Dart's reactive model.
dart:convert
Built-in JSON, UTF-8, Base64, and LineSplitter encoders/decoders. jsonDecode / jsonEncode for serialization. Support for codec chaining.
