Mockable UserDefaults with Duck typing

7a78f23eef1b0e883ef44c229a54f0bb?s=47 417.72KI
June 18, 2019
Programming
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380

Mockable UserDefaults with Duck typing

7a78f23eef1b0e883ef44c229a54f0bb?s=128

417.72KI

June 18, 2019
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Transcript

  1. 1.

    .PDLBCMF6TFS%FGBVMUT XJUI %VDLUZQJOH  QPUBUPUJQT

  2. 2.

    struct Me { let name = "Takuhiro Muta" let aka

    = "417.72KI" let experienceYears = 5 let company = "iRidge inc." let twitter = "417_72ki" let qiita = "417_72ki" let gitHub = "417-72KI" let products = [ "BuildConfig.swift", "MockUserDefaults", ] } TFMGEFTDSJQUJPO
  3. 3.

    %VDL5ZQJOH

  4. 4.

    %VDL5ZQJOH w 0OFPGUIFNFUIPETUPJNQMFNFOU QPMZNPSQIJTN w 6TFEJOEZOBNJDMBOHVBHFT FH3VCZ 1ZUIPO  w

    0CKFDUTTVJUBCJMJUZJTEFUFSNJOFECZUIF QSFTFODFPGDFSUBJONFUIPETBOE QSPQFSUJFT w /PUPCKFDU`TPXOUZQF
  5. 5.

    r%BWF5IPNBT l*GJUXBMLTMJLFBEVDLBOERVBDLTMJLFB EVDL JUNVTUCFBEVDLz

  6. 6.

    %VDL5ZQJOH class Duck: def walk(self): print("Duck walking") def quack(self): print("Quack!!")

    class Dog: def walk(self): print("Dog walking") def bark(self): print("Bark!!") def walk_and_quack(animal): animal.walk() animal.quack()
  7. 7.

    %VDL5ZQJOH class Duck: def walk(self): print("Duck walking") def quack(self): print("Quack!!")

    class Dog: def walk(self): print("Dog walking") def bark(self): print("Bark!!") def walk_and_quack(animal): animal.walk() animal.quack()
  8. 8.

    %VDL5ZQJOH class Duck: def walk(self): print("Duck walking") def quack(self): print("Quack!!")

    class Dog: def walk(self): print("Dog walking") def bark(self): print("Bark!!") def walk_and_quack(animal): animal.walk() animal.quack()
  9. 9.

    %VDL5ZQJOH class Duck: def walk(self): print("Duck walking") def quack(self): print("Quack!!")

    class Dog: def walk(self): print("Dog walking") def bark(self): print("Bark!!") def walk_and_quack(animal): animal.walk() animal.quack()
  10. 10.

    %VDL5ZQJOH walk_and_quack(Duck()) # Duck walking # Quack!! walk_and_quack(Dog()) # Dog

    walking # AttributeError: 'Dog' object has # no attribute 'quack'
  11. 11.

    *O0CK$ @interface Duck: NSObject - (void)walk; - (void)quack; @end @implementation

    Duck - (void)walk { NSLog(@"Duck walking"); } - (void)quack { NSLog(@"Quack!!"); } @end void walkAndQuack(id animal) { [animal walk]; [animal quack]; }
  12. 12.

    *O0CK$ @interface Duck: NSObject - (void)walk; - (void)quack; @end @implementation

    Duck - (void)walk { NSLog(@"Duck walking"); } - (void)quack { NSLog(@"Quack!!"); } @end void walkAndQuack(id animal) { [animal walk]; [animal quack]; }
  13. 13.

    *O0CK$ @interface Duck: NSObject - (void)walk; - (void)quack; @end @implementation

    Duck - (void)walk { NSLog(@"Duck walking"); } - (void)quack { NSLog(@"Quack!!"); } @end void walkAndQuack(id animal) { [animal walk]; [animal quack]; }
  14. 14.

    *O0CK$ walkAndQuack([Duck new]); // Duck walking // Quack!! walkAndQuack([Dog new]);

    // Dog walking // unrecognized selector sent to instance
  15. 15.

    )PXUPNPDL 6TFS%FGBVMUT

  16. 16.

    r%BWF5IPNBT l*GJUXBMLTMJLFBEVDLBOERVBDLTMJLFB EVDL JUNVTUCFBEVDLz

  17. 17.

    l*GJUTBWFTPCKFDUTMJLF6TFS%FGBVMT
 BOEMPBETPCKFDUTMJLF6TFS%FGBVMUT 
 JUNVTUCF6TFS%FGBVMUTz

  18. 18.

    %FpOFBMMNFUIPETJO /46TFS%FGBVMUT

  19. 19.

    %FpOFBMMNFUIPETJO /46TFS%FGBVMUT /PUFYUFOE/46TFS%FGBVMUT

  20. 20.

    *NQMFNFOU

  21. 21.

    %FpOFFYUFOTJPOUPVTFJU BT/46TFS%FGBVMUT

  22. 22.

    %FpOFFYUFOTJPOUPVTFJU BT/46TFS%FGBVMUT

  23. 23.

    %FpOFFYUFOTJPOUPVTFJU BT/46TFS%FGBVMUT ⁉

  24. 24.
    None
  25. 25.

    5IBOLZPV IUUQTHJUIVCDPN,*.PDL6TFS%FGBVMUT