golangIntro.slide

A quick intro to Go
2014-03-05

Chris Agocs
Software engineer, Backstop Solutions
cagocs@backstopsolutions.com
http://www.agocs.org
@agox

* What is it?
New language, has been around since 2009 (kinda)
Statically typed (kinda)
Object oriented (kinda)
Garbage collected (fully)

* What is it good at?
Quick compile times
Creating statically linked native binaries
Concurrency

* Why is it?
Next step in systems programming
Take advantage of multicore computers
Make programming fun again




* Hello World
Wooooooooooo

.play examples/hello_world.go




* Some basic syntax

.play examples/hello_world_syntax.go /START OMIT/,/END OMIT/

private String getHellos (int numHellos){...}

[[http://blog.golang.org/gos-declaration-syntax][Go's Declaration Syntax]]
[[http://c-faq.com/decl/spiral.anderson.html][the Clockwise Spiral Rule]]



* Static Typing

.play examples/static_typing2.go /START OMIT/,/END OMIT/ 


* Object Orientation

.play examples/object_orientation_simple.go /START OMIT/,/END OMIT/

* More Object Orientation
.play examples/object_orientation_complex.go /START OMIT/,/END OMIT/
[[http://golang.org/pkg/fmt/#Stringer][Stringer interface]]


* Compile times
Quick

* Native binaries
No runtime
Quick example

* Concurrency
Goroutines
- Really light weight, inexpensive threads

Channels
- Buffers for communication between goroutines

Select
- Selects between recieving channels


* Noroutines

.play examples/noroutines.go /START OMIT/,/END OMIT/


* Goroutines
.play examples/goroutines.go /START OMIT/,/END OMIT/

* Make programming fun again
Live example
[[https://github.com/camerazn/GolangIntro/blob/master/examples/dumbclient.go][Here's what we wrote during the session]]

* Who is using Go?
Google
Bit.ly
CloudFlare
Iron.io
SmugMug
Docker
etc., etc.