Dart: Preview

Transcript

1. <ladicek@gmail.com> Dart: Preview
2. • Javascript has fundamental flaws that cannot be fixed merely by evolving the language. • Dash is designed with three perspectives in mind: ◦ Performance, Developer Usability, Ability to be Tooled • Dash is also designed to be securable • Dash will be designed so that a large subset of it can be compiled to target legacy Javascript platforms https://gist.github.com/1208618
3. • familiar ◦ both to Java and JavaScript developers ◦ conservative and progressive • serious ◦ more than 70 committers (from Google)! ◦ Gilad Bracha, Josh Bloch, Lars Bak, Peter Ahé • open Dart is
4. • ready • widely accepted • statically typed • JavaScript killer Dart is not
5. main() { print("Hello, Dart!"); } Demo
6. • functions ◦ Lisp for human beings • event loop ◦ async programming ◦ GUI • extensibility, expressive power JavaScript: The Good Parts
7. • mandatory semicolons • main function as an entry point Dart does have
8. • optional types • arbitrary precision int (+ usual double) • constants • named constructors and factories • named and optional parameters • properties (getters and setters), operators • interpolated strings • higher order functions, lexical closures • parameterized classes (reified) • event loop • isolates (actors) and message passing Dart does have
9. • specification • own VM (without bytecode) ◦ API for embedding • compiler to JavaScript written in Java • compiler to JavaScript written in Dart • IDE based on Eclipse Dart does have
10. • a lot of syntactic sugar Dart doesn't have (yet)
11. • sound type system • variadic functions • public/protected/private • enums • method overloading • threads and shared memory • LINQ • generators, list comprehension • pattern matching • extension methods, traits, mixins, multiple inheritance Dart doesn't have (yet)
12. • production-ready implementation • a lot of existing libraries • package system ◦ I'm on it! Dart doesn't have (yet)
13. #import('matchers.dart'); main() { expectThat("abc", beginsWith("ab")); } Demo
14. #import('dart:html'); var doc = document; main() { doc.query("#header").innerHTML = ...; doc.queryAll("button").on.click.add( (event) { ... } ); } Demo
15. Because Java is dead and JavaScript sucks. But you can still use C#. Why Dart?
16. • https://gist.github.com/1208618 • http://www.dartlang.org/ • https://github.com/Ladicek/dart-playground • https://github.com/Ladicek/dart-matchers • https://github.com/Ladicek/dart-query • https://github.com/Ladicek/dpm • https://github.com/LUCA-Studios- LLC/LUCA-UI-Framework-for-Dart Links