You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
46 lines
696 B
Go
46 lines
696 B
Go
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"time"
|
|
)
|
|
|
|
const finalWord = "Go!"
|
|
|
|
// const countDownStart = 3
|
|
|
|
type Sleeper interface {
|
|
Sleep()
|
|
}
|
|
|
|
// type DefaultSleeper struct{}
|
|
|
|
// func (d *DefaultSleeper) Sleep() {
|
|
// time.Sleep(1 * time.Second)
|
|
// }
|
|
|
|
type ConfigurableSleeper struct {
|
|
duration time.Duration
|
|
sleep func(time.Duration)
|
|
}
|
|
|
|
func (c *ConfigurableSleeper) Sleep() {
|
|
c.sleep(c.duration)
|
|
}
|
|
|
|
func Countdown(out io.Writer, sleeper Sleeper, count int) {
|
|
for i := count; i > 0; i-- {
|
|
fmt.Fprint(out, i, "\n")
|
|
sleeper.Sleep()
|
|
}
|
|
|
|
fmt.Fprint(out, finalWord, "\n")
|
|
}
|
|
|
|
func main() {
|
|
sleeper := &ConfigurableSleeper{1 * time.Second, time.Sleep}
|
|
Countdown(os.Stdout, sleeper, 3)
|
|
}
|