Object Oriented Programming in Go

Talk given at BostonGolang (bostongolang.org) to an audience of programmers looking to transition to Go from other OO languages. This gives a good overview of how Go does OO differently and how to do it idiomatically.

Transcript

1. OOP in Go Familiar but Different
2. About Me Johnny Boursiquot Principal Software Engineer 
 @ RBM T echnologies @jboursiquot on T witter, GitHub, etc Programing language enthusiast
3. About this talk Beginner to Intermediate level Basic understanding of OOP from another language for context Some familiarity with Go syntax expected but not mandatory
4. What we’ll cover What is OOP anyway? How does Go differ? What does OOP look and feel like in Go? Q&A
5. What is OOP anyway?
6. OOP OOP tends to model concepts as “objects” that interact with other objects within the world of your program Most are familiar with class-based OOP Java, C++, Objective-C, Ruby, Python and others, all embrace class-based OO
7. OOP “Objects” have both data (state) and behavior (code, often called “methods”) Behaviors access and often modify object state Objects tend to have the notion of “self” or “this”
8. OOP “Objects” represent “instances” of “classes” in common OO languages Class-based orientation commonly includes Inheritance and Polymorphism OO programmers have come to favor composition over inheritance
9. How does Go differ?
10. T ypes and values rather than “classes” and “objects”
11. // data http://play.golang.org/p/Mz3rqyIRO7
12. // behavior (on types) http://play.golang.org/p/7wo-feyESu
13. // behavior (on any type) http://play.golang.org/p/lvTRl2fYhh
14. Composition over Inheritance
15. Composition (Embedding) http://play.golang.org/p/ZZmeDoeMgi
16. Composition & Anonymous field method access http://play.golang.org/p/XIepDulSMp
17. Anonymous field types do not enable Sub-Classing http://play.golang.org/p/Bw8HcUBfSm
18. Polymorphism through Interfaces
19. Interface T ype http://play.golang.org/p/3BxLmc36q_
20. In a Nutshell Go has types and values rather than classes and objects Go provides many of the same features we're used to in classical- orientated languages: methods on any type automatic message delegation through embedding polymorphism through interfaces Go does not have inheritance, no "is-a" relationships between objects Go relies on composition for OO
21. Program in Go
 in the “Go Way”
22. Go-related https://www.youtube.com/watch?v=HqZQBmNVhBw http://spf13.com/post/is-go-object-oriented/ http://nathany.com/good/ https://www.youtube.com/watch?v=B-r3Wf_I2Lk http://www.goinggo.net/2014/05/methods-interfaces-and-embedded-types.html http://jordanorelli.com/post/32665860244/how-to-use-interfaces-in-go OOP in general: http://www.artima.com/lejava/articles/designprinciples.html http://en.wikipedia.org/wiki/Object-oriented_programming http://en.wikipedia.org/wiki/Composition_over_inheritance http://en.wikipedia.org/wiki/Polymorphism_(computer_science) http://en.wikipedia.org/wiki/Polymorphism_(computer_science) http://en.wikipedia.org/wiki/Class-based_programming Resources
23. Thanks!
 Q & A
 @jboursiquot