Hack - Why Should I Care?

version given at Nomad PHP EU in April 2015

Transcript

1. Hack

   Why Should I Care?
   Joel Clermont

   @jclermont
   

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2. What to expect
   • No insider secrets
   

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3. What to expect
   • No insider secrets
   • High-level tour of Hack’s unique features
   

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4. What to expect
   • No insider secrets
   • High-level tour of Hack’s unique features
   • Make the case why you should try it out
   

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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
   

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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
   

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7. Quick Tour of Hack
   

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8. Type Annotations
   

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9. Type Annotations
   

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10. Type Annotations
    

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11. Type Annotations

    Where do we need them?
    

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12. Type Annotations

    Where do we need them?
    1
    

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13. Type Annotations

    Where do we need them?
    1
    2
    

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14. Type Annotations

    Where do we need them?
    1
    2 3
    

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15. Type Annotations

    Where do we need them?
    1
    2 3
    

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16. Type Annotations

    Where do we need them?
    

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17. Type Annotations

    What do we get out of it?
    • Easier for developers to understand intent
    

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18. Type Annotations

    What do we get out of it?
    • Easier for developers to understand intent
    • Correctness of our type system
    

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19. Type Annotations

    What do we get out of it?
    • Easier for developers to understand intent
    • Correctness of our type system
    • Easier to refactor
    

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20. Doesn’t PHP already
    have type hints?
    

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21. Doesn’t PHP already
    have type hints?
    • Scalar type hints
    

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22. Doesn’t PHP already
    have type hints?
    • Scalar type hints
    • Typed arrays
    

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23. Doesn’t PHP already
    have type hints?
    • Scalar type hints
    • Typed arrays
    • Nullable types
    

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24. Doesn’t PHP already
    have type hints?
    • Scalar type hints
    • Typed arrays
    • Nullable types
    • Function return type hints
    

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25. Doesn’t PHP already
    have type hints?
    • Scalar type hints
    • Typed arrays
    • Nullable types
    • Function return type hints
    • Type checker
    

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26. More useful Hack types
    

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27. More useful Hack types
    

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28. More useful Hack types
    

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29. More useful Hack types
    

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30. More useful Hack types
    

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31. Questions?
    

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32. Still not convinced?

    

    DEMO
    

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33. What’s wrong?
    

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34. What’s wrong?
    

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35. What’s wrong?
    

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36. What’s wrong?
    

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37. What’s wrong?
    

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38. Solution 1
    

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39. Solution 2
    

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40. Solution 3
    

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41. What’s wrong?
    

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43. Solution
    

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44. Questions?
    

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45. More Cool Features
    

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46. Lambdas
    

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47. Lambdas
    

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48. Lambdas
    

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49. Lambdas
    

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50. Collections
    Why would I need anything besides an array?
    

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51. Collections
    Anyone know what this is?
    

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52. Collections
    Hack gives us the right tool for each job
    

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53. Collections
    Cleaner API
    

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54. Collections
    Other nice features
    • Familiar interface
    

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55. Collections
    Other nice features
    • Familiar interface
    • OutOfBoundsException
    

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56. Collections
    Other nice features
    • Familiar interface
    • OutOfBoundsException
    • Collections are objects (no more passing by ref)
    

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57. Collections
    Other nice features
    • Familiar interface
    • OutOfBoundsException
    • Collections are objects (no more passing by ref)
    • Immutable collections too
    

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58. Trailing Commas
    You know you want them
    

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59. And more . . .
    • User attributes
    • Enhancements to traits
    • Async / await
    • Constructor promotion
    • Shapes
    • Type aliases . . . .
    

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60. Questions?
    

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61. Why should you consider it?
    Safety
    Language Features
    (Developer) Speed
    

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62. Trying out Hack is not scary
    • Gradual process
    

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63. Trying out Hack is not scary
    • Gradual process
    • Full PHP interoperability
    

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64. Trying out Hack is not scary
    • Gradual process
    • Full PHP interoperability
    • Not just for multi-million line codebases
    

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65. Trying out Hack is not scary
    • Gradual process
    • Full PHP interoperability
    • Not just for multi-million line codebases
    • Awesome tooling
    

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66. How to get started
    • Install HHVM (packages available)
    

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67. How to get started
    • Install HHVM (packages available)
    • Convert existing code with hackificator
    

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68. How to get started
    • Install HHVM (packages available)
    • Convert existing code with hackificator
    • Monitor logs for type errors
    

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69. How to get started
    • Install HHVM (packages available)
    • Convert existing code with hackificator
    • Monitor logs for type errors
    • Harden your types over time
    

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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
    

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71. grumpy-learning.com
    

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72. Questions?
    @jclermont
    https://joind.in/talk/view/14452
    

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73. Feedback please
    @jclermont
    https://joind.in/talk/view/14452
    

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74. Thank you!
    @jclermont

    

    https://joind.in/talk/view/14452
    

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