play-golang

package main

import (
	"encoding/json"
	"fmt"
	"log"
	"time"
)

// Movie doc
type Movie struct {
	Title  string
	Year   int  `json:"released"`
	Color  bool `json:"color,omitempty"`
	Actors []string
}

func main() {
	jsonMarshall()
	intervalTimer()
	tickTimer()
	timerAndTicker()
}

func jsonMarshall() {
	var movies = Movie{
		Title: "Casablanca", Year: 1992, Color: false, Actors: []string{"Humprey", "Mubarok"},
	}
	data, err := json.MarshalIndent(movies, "", "  ")

	if err != nil {
		log.Fatalf("%s", err)
	}

	fmt.Printf("\n%s\n", data)
}

func intervalTimer() {
	timer := time.NewTimer(time.Second * 2)
	defer fmt.Printf("The End\n")
	fmt.Printf("Starting...\n")
	fmt.Printf("Counting...\n")
	<-timer.C
	println("Wohoo")
}

func tickTimer() {
	ticker := time.NewTicker(time.Second)
	go func() {
		for t := range ticker.C {
			fmt.Println("Tick at", t)
		}
	}()

	time.Sleep(time.Second * 10)
	ticker.Stop()
	fmt.Println("Stopped")
}

func timerAndTicker() {
	timeChannel := time.NewTimer(time.Second * 5).C
	tickChannel := time.NewTicker(time.Second).C

	doneChannel := make(chan bool)
	go func() {
		time.Sleep(time.Second * 10)
		doneChannel <- true
	}()

	for {
		select {
		case <-timeChannel:
			fmt.Println("timer is expired")
		case <-tickChannel:
			fmt.Println("ticker is ticked")
		case <-doneChannel:
			fmt.Println("Done")
			return
		}
	}
}