go語言定時器

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package mainimport "fmt"import "time"func main() {        t := time.NewTimer(2 * time.Second)        //v := <- t.C         //fmt.Println(v)        go onTime(t.C)        fmt.Println("main thread")        time.Sleep(10 * time.Second)}func onTime(c <-chan time.Time) {        for now := range c {                 // now := <- c                fmt.Println("onTime", now)        }   }

package mainimport "fmt"import "time"func main() {time.AfterFunc(5 * time.Second, f1)time.AfterFunc(2 * time.Second, f2)fmt.Println("main thread")time.Sleep(10 * time.Second)}func f1() {fmt.Println("f1 done !")}func f2() {fmt.Println("f2 done !")}

package mainimport "fmt"import "time"var count int = 0func main() {t := time.Tick(2 * time.Second)i := 0for now := range t {fmt.Println(now, doSomething())i++if i > 10 {break}}}func doSomething() int {count++return count}