A very quick introduction to go in 90 minutes.

1. A quick introduction to Go

2. Why Go?
● Statically Typed Compiled Language
● Fast Compilation
● Built in Concurrency
● Built in unit testing
● Go Tooling
● 25 keywords.
● Mostly has only one way to do it.

3. Organising Go Code
● Packages
● GOPATH - where all the source code will be available for the tools
● $HOME/go is the default GOPATH. src folder under this will hold all the code.

4. Basic Types & Default Values
● Int/uint - int8, int16, int32, int64 - 0
● Float - float32,float64 - 0
● String = “”
● Bool - false
● Byte - 0

5. Packages
● Every file in Go belongs to a package.
● Collection of source files in a directory.
● Visibility - First character upper case
● Local package
● Remote package
● Import “github.com/golang/x/tools”
● Remote packages are fetched by go get github.com/x/y/z

6. Go Std lib packages
● fmt
● io
● os
● strings
● strconv
● time
● sync
● net/http
● encoding/json
● math

7. Go Tooling
● gofmt
● golint
● godoc
● go build
● go install
● go get
● go test

8. Other types
● Struct
● Array
● Slices
● Map
● make keyword

9. Control Flow
● For
● if
● switch case
● defer

10. Methods & Functions
func add(a,b int) int {
return a+b
}
func (o MyObj) add() int {
return o.a +o.b
}

11. Methods
● Pointer Receiver
● Value Receiver

12. Functions
● Pure functions
● Anonymous functions
● Defined functions

13. Interfaces
● A type defined with set of methods definitions
● Implicit implementation
● Interface values - a tuple of value and type
● Nil interfaces
● Empty interfaces
● Type Assertion
● Type Switch

14. Error handling
● error is an interface in Go
● Check for error before proceeding
● Panic

15. ● A lightweight thread
● Use the go keyword to make any function a goroutine
● Channels
○ Typed data structures for communication
○ Buffered vs Unbuffered
○ ch <- v //Send
○ v := <-ch //Receive
Goroutines

16. Resources
● Effective Go
● A Tour of Go
● The Go Programming Language by Kernighan, Donovich
● Go in Action by Bill Kennedy

17. Thank You