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A beleza das interfaces em Go

pcasarettto
July 09, 2016
Programming
2
200

A beleza das interfaces em Go

pcasarettto

July 09, 2016
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Transcript

  1. A beleza das
    interfaces em Go

    View Slide

  2. Paulo Casaretto
    @pcasaretto

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  3. Interface

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  4. Interfaces em Go

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  5. View Slide

  6. View Slide

  7. View Slide

  8. io.Reader
    io.Writer

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  9. io.Copy
    io.Reader io.Writer

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  10. Reader Example: GIF Decoder

    View Slide

  11. os.File
    deblockingReader
    lzw.Reader

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  12. os.File | deblockingReader | lzw.Reader

    View Slide

  13. os.File
    deblockingReader
    lzw.Reader
    io.Reader

    View Slide

  14. Usando interfaces

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  15. View Slide

  16. View Slide

  17. View Slide

  18. View Slide

  19. Two relevant Go proverbs

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  20. THE BIGGER THE INTERFACE,
    THE WEAKER THE
    ABSTRACTION

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  21. interface{} says nothing

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  22. ProTip

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  23. • https://blog.golang.org/error-handling-and-go
    • https://blog.golang.org/errors-are-values
    • https://blog.golang.org/gif-decoder-exercise-
    in-go-interfaces
    • https://go-proverbs.github.io/
    Resources

    View Slide

  24. Thanks!

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  25. panic(“Thanks!”)

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  26. View Slide

  27. View Slide

  28. View Slide