Dart Side of the Moon

1. Yehor Lvivski @lvivski
2. The Dart side of the Moon
4. class-based single inheritance object-oriented
5. History
6. Oct 11, 2011 Apr 16, 2013 Summer 2013
7. M1, July 2012 • No explicit interfaces • No `+` on Strings • Cascades `o..method()`
8. M2, December 2012 • Better Dart2js • PUB • Better libraries API
9. M3, February 2013 • Streams API • Lazy Iterators
10. M4, April 2013 Stability!
11. Who’s behind?
14. Why?
15. Performance
16. main(){}! Tree shaking Classes and Interfaces Optional types Concurrency Operator overloading Optional and Named arguments Lightweight syntax
17. It’s not a syntax sugar
18. Standalone VM Browser integrated VM dart2js Compiler
20. How it works
24. Is it even possible?
25. Generated code is faster, than handwritten. Prototype-less code is faster, than Prototype chains. Inlined functions, are faster too ;)
27. Laziness
29. Laziness • map()! • where() (filter analogue) • expand()!
30. Streams Reactive Programming
31. Streams •  emit a repeating series of events (such as messages, file data, user clicks) •  single- or multi-subscriber •  methods to take partial data  (first,  take,   skip...)   •  check data (contains,  any,  every)   •  transform
32. Streams are Everywhere • Iterators (List, Queue, Set) • IO (File, HTTP) • Events
33. Infrastructure
34. Editors
37. Package manager
39. Components
40. Dart Web UI Package
42. Demo time!
43. Links •  h'p://www.dartlang.org   •  h'p://github.com/dart-­‐lang/web-­‐ui   •  h'p://github.com/lvivski   – speaker,  start,  hart,  gloss,  quart,  archer   Thanks