Hack - Why Should I Care?

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?

42. None

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