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December 2, 2012 22:45
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two ways to call a function every 2 seconds
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| package main | |
| import ( | |
| "fmt" | |
| "time" | |
| ) | |
| // Suggestions from golang-nuts | |
| // http://play.golang.org/p/Ctg3_AQisl | |
| func doEvery(d time.Duration, f func(time.Time)) { | |
| for x := range time.Tick(d) { | |
| f(x) | |
| } | |
| } | |
| func helloworld(t time.Time) { | |
| fmt.Printf("%v: Hello, World!\n", t) | |
| } | |
| func main() { | |
| doEvery(20*time.Millisecond, helloworld) | |
| } |
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| package main | |
| import ( | |
| "fmt" | |
| "time" | |
| "net/http" | |
| ) | |
| func doSomething(s string) { | |
| fmt.Println("doing something", s) | |
| } | |
| func startPolling1() { | |
| for { | |
| time.Sleep(2 * time.Second) | |
| go doSomething("from polling 1") | |
| } | |
| } | |
| func startPolling2() { | |
| for { | |
| <-time.After(2 * time.Second) | |
| go doSomething("from polling 2") | |
| } | |
| } | |
| func handler(w http.ResponseWriter, r *http.Request) { | |
| fmt.Fprintf(w, "Hi there, I love %s!", r.URL.Path[1:]) | |
| } | |
| func main() { | |
| go startPolling1() | |
| go startPolling2() | |
| http.HandleFunc("/", handler) | |
| http.ListenAndServe(":8080", nil) | |
| } |
ty, still good solution for 2020, haha
How to stop the polling?
@IgorDePaula take a look at this playground:
https://play.golang.org/p/l_9R0d71iIJ
I've altered the time.Tick solution to use a select together with Context.
@q42jaap Thank you
thanks <3
Thank you !
Nice
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doEvery(20*time.Millisecond, helloworld)calls
helloworldevery 0.02 seconds, not every 2 seconds