有没有办法在Go中执行重复的后台任务?我在考虑类似Timer.schedule(task, delay, period)Java 的东西.我知道我可以用goroutine做到这一点Time.sleep(),但是我想要一些容易停止的东西.
这是我得到的,但看起来很难看.有更干净/更好的方式吗?
func oneWay() {
var f func()
var t *time.Timer
f = func () {
fmt.Println("doing stuff")
t = time.AfterFunc(time.Duration(5) * time.Second, f)
}
t = time.AfterFunc(time.Duration(5) * time.Second, f)
defer t.Stop()
//simulate doing stuff
time.Sleep(time.Minute)
}
Run Code Online (Sandbox Code Playgroud) Go抱怨在if语句中实例化一个struct.为什么?是否有正确的语法,不涉及临时变量或新函数?
type Auth struct {
Username string
Password string
}
func main() {
auth := Auth { Username : "abc", Password : "123" }
if auth == Auth {Username: "abc", Password: "123"} {
fmt.Println(auth)
}
}
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错误(在if语句行上):语法错误:意外:,期待:=或=或逗号
这会产生相同的错误:
if auth2 := Auth {Username: "abc", Password: "123"}; auth == auth2 {
fmt.Println(auth)
}
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这按预期工作:
auth2 := Auth {Username: "abc", Password: "123"};
if auth == auth2 {
fmt.Println(auth)
}
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