阅读这些文章，了解 Dart 语言及其库。
Emulating Functions in DartJanuary 2012 (updated: September 2018)
Learn how to define Dart classes that behave like functions.
A Brief History of Mixins in DartDecember 2012 (updated: June 2018)
Mixins let you implement functionality once and use it in multiple classes.
Dart Language Asynchrony Support: Phase 2March 2015
Async*, sync*, yield, and yield* are now available as part of Dart's asynchrony support.
Dart Language Asynchrony Support: Phase 1October 2014
Async and await, two language features that support asynchronous programming, are now available in Dart.
库 和 API
Creating Streams in DartApril 2013 (updated: September 2018)
A stream is a sequence of results; learn how to create your own.
An Introduction to the dart:io LibraryMarch 2012 (updated: September 2018)
An introduction to the Dart I/O library, which is aimed at code that runs in Flutter and the standalone Dart VM.
Serialization in DartFebruary 2015 (updated: July 2018)
Choose the serialization strategy that's right for your project.
Converters and CodecsFebruary 2014 (updated: March 2015)
Learn how to write efficient conversions.
Manage your asynchronous code: handle uncaught errors, override behavior (such as printing and scheduling tasks), and more.
Single-Subscription vs. Broadcast StreamsJanuary 2014
Choose the kind of stream that's best for your application: single-subscription or broadcast.
Reflection in Dart with Mirrors: An IntroductionNovember 2012 (updated: November 2013)
Use the dart:mirrors library for introspection: discovering and using your program's structure.