Hack - Why Should I Care?

version given at Nomad PHP EU in April 2015

Transcript

1. Hack
 Why Should I Care? Joel Clermont
 @jclermont
2. What to expect • No insider secrets
3. What to expect • No insider secrets • High-level tour of Hack’s unique features
4. What to expect • No insider secrets • High-level tour of Hack’s unique features • Make the case why you should try it out
5. What to expect • No insider secrets • High-level tour of Hack’s unique features • Make the case why you should try it out • Show you how to get started
6. What to expect • No insider secrets • High-level tour of Hack’s unique features • Make the case why you should try it out • Show you how to get started • Answer all your questions
7. Quick Tour of Hack
8. Type Annotations
9. Type Annotations
10. Type Annotations
11. Type Annotations
 Where do we need them?
12. Type Annotations
 Where do we need them? 1
13. Type Annotations
 Where do we need them? 1 2
14. Type Annotations
 Where do we need them? 1 2 3
15. Type Annotations
 Where do we need them? 1 2 3
16. Type Annotations
 Where do we need them?
17. Type Annotations
 What do we get out of it? • Easier for developers to understand intent
18. Type Annotations
 What do we get out of it? • Easier for developers to understand intent • Correctness of our type system
19. Type Annotations
 What do we get out of it? • Easier for developers to understand intent • Correctness of our type system • Easier to refactor
20. Doesn’t PHP already have type hints?
21. Doesn’t PHP already have type hints? • Scalar type hints
22. Doesn’t PHP already have type hints? • Scalar type hints • Typed arrays
23. Doesn’t PHP already have type hints? • Scalar type hints • Typed arrays • Nullable types
24. Doesn’t PHP already have type hints? • Scalar type hints • Typed arrays • Nullable types • Function return type hints
25. Doesn’t PHP already have type hints? • Scalar type hints • Typed arrays • Nullable types • Function return type hints • Type checker
26. More useful Hack types
27. More useful Hack types
28. More useful Hack types
29. More useful Hack types
30. More useful Hack types
31. Questions?
32. Still not convinced?
 
 DEMO
33. What’s wrong?
34. What’s wrong?
35. What’s wrong?
36. What’s wrong?
37. What’s wrong?
38. Solution 1
39. Solution 2
40. Solution 3
41. What’s wrong?
43. Solution
44. Questions?
45. More Cool Features
46. Lambdas
47. Lambdas
48. Lambdas
49. Lambdas
50. Collections Why would I need anything besides an array?
51. Collections Anyone know what this is?
52. Collections Hack gives us the right tool for each job
53. Collections Cleaner API
54. Collections Other nice features • Familiar interface
55. Collections Other nice features • Familiar interface • OutOfBoundsException
56. Collections Other nice features • Familiar interface • OutOfBoundsException • Collections are objects (no more passing by ref)
57. Collections Other nice features • Familiar interface • OutOfBoundsException • Collections are objects (no more passing by ref) • Immutable collections too
58. Trailing Commas You know you want them
59. And more . . . • User attributes • Enhancements to traits • Async / await • Constructor promotion • Shapes • Type aliases . . . .
60. Questions?
61. Why should you consider it? Safety Language Features (Developer) Speed
62. Trying out Hack is not scary • Gradual process
63. Trying out Hack is not scary • Gradual process • Full PHP interoperability
64. Trying out Hack is not scary • Gradual process • Full PHP interoperability • Not just for multi-million line codebases
65. Trying out Hack is not scary • Gradual process • Full PHP interoperability • Not just for multi-million line codebases • Awesome tooling
66. How to get started • Install HHVM (packages available)
67. How to get started • Install HHVM (packages available) • Convert existing code with hackificator
68. How to get started • Install HHVM (packages available) • Convert existing code with hackificator • Monitor logs for type errors
69. How to get started • Install HHVM (packages available) • Convert existing code with hackificator • Monitor logs for type errors • Harden your types over time
70. Resources • Conversion guide
 http://docs.hhvm.com/manual/en/install.hack.conversion.php • HHVM blog http://hhvm.com/blog • IRC channel #hhvm • http://hhvm.com/frameworks/ • https://github.com/facebook/hhvm/wiki/Extensions
71. grumpy-learning.com
72. Questions? @jclermont https://joind.in/talk/view/14452
73. Feedback please @jclermont https://joind.in/talk/view/14452
74. Thank you! @jclermont
 
 https://joind.in/talk/view/14452