golang getting started

1. Golang
Getting started
Not a talk – reference deck

2. What is go?
• Statically-typed language //resembles C
• Concurrency
• Garbage collection
• Type safety – with some dynamic typing
• Fast compilation
• Remote package management
• Great builtins
… C + some Awesome stuff

3. The Mandatory
• http://play.golang.org/p/OccSs5jC9Y
package main
import "fmt”
func main() {
fmt.Println("Hello World!")
}

4. Built for networks
• A simple server
package main
import "fmt”
Import "net/http”
func hello(w http.ResponseWriter, r *http.Request) {
fmt.Fprint(w, "Hello Client") //write response
}
func main() {
http.HandleFunc("/", hello //attach handler
http.ListenAndServe(":8080”, nil) //start server
}

5. Concurrency
Green Threading like python – goroutines
no Gil like limitations
https://gobyexample.com/goroutines
Utilize multiple cores
goroutines can be run on multiple threads

6. External pacakges
go get <package_name>
e.g. go get github.com/goibibo/gorpc
Installs to your specified path
easily install forks
Also checkout godep, https://github.com/tools/godep for better
managing dependencies of your project

7. Builtins
Just checkout https://golang.org/pkg/
You can see the source at https://golang.org/src/

8. Start- tour
• Take the tour, complete it tour.golang.org
• Check http://openmymind.net/The-
Little-Go-Book/ for a light introduction

9. Start- install
• Install locally (1.4 for now)
• http://golang.org/doc/install
• Or the docker image if you prefer
https://hub.docker.com/r/google/golang/

10. Start – more stuff
• How to write Go code
• Effective Go
• http://golang.org/doc/effective_go.html
• Best Practices
• https://talks.golang.org/2013/bestpractic
es.slide#1

11. Start – some more stuff
• Organising Go code by David Crawshaw,
presented at Google I/O 2014.
• Contributing to Open Source Git
Repositories in Go by Katrina Owen.

12. Dev Environment - editors
• Sublime Text 3
 http://eefret.me/making-sublime-your-golang-ide/
• LiteIde
 http://www.i-programmer.info/programming/other-
languages/6600-a-programmers-guide-to-go-with-
liteide-part-1.html

13. Dev Environment – tools
• go fmt
• golint

14. Right tool for the right problem…
• Good for
 Backend APIs
 Process Heavy stuff
 Non blocking IO, service calls
• Not so great
 Templating
 ORMs
… But still growing