Go Workshop

Installation

Download the last release from: https://golang.org/dl/

Or use a language distribution versioning tool: https://github.com/asdf-vm/asdf

Tooling

go get -u golang.org/x/tools/...

Agenda

Modules

package account

Functions

func myFunc() {
    return "Hello, world!"
}

Types

bool

string

int  int8  int16  int32  int64
uint uint8 uint16 uint32 uint64 uintptr

byte // alias for uint8

rune // alias for int32
     // represents a Unicode code point

float32 float64

complex64 complex128

You can see more details:

fmt.Printf("Type: %T Value: %v\n", x, x)

Tests

Create a file ending with _test.go, like this:

touch account_test.go

Now, let's write some tests.

package account

import "testing"

func TestAbc(t *testing.T) {}
    t.Error() // to indicate test failed
}

Structs

type Account struct {
	ID int64
	PersonName string
	Cards []*Card
}

Interfaces

type Logger interface {
	String() string
	Print(interface{})
}

Advanced

Builtin Concurrency

• Goroutines
• Wait Groups
• Mutexes

Next Steps

Real world projects ideas:

• A CLI that automates a process done by the development team.
• A Rest API that gets the weather for my location.
• A memory cache system, Redis alike.