Go Overview

time.go

package main

import "fmt"
import "time"

func main() {  
    finished := make(chan bool, 1)

    go ticker(finished)
 
   fmt.Println("Hello, playground")
   
   <-finished
   fmt.Println("Finished")

}

func ticker(finished chan bool){
       fmt.Println("Waiting")
       t := makeTicker(1*time.Second)
       for i := 0; i < 12; i++{
         <-t // receive time every 1 second
         fmt.Println(i+1,"second(s) passed")
       }
       
       finished<-true
}

func makeTicker(dur time.Duration)chan time.Time{
   tickChan := make(chan time.Time)
   go func(){
      for{
         lastTime := time.Now()
         tickTime := lastTime.Add(dur)
         for time.Now().Before(tickTime){
           // just waiting for time to pass
         }
         tickChan<-time.Now()
       }
    }()  
    return tickChan
}