// Copyright 2011 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package time_test import ( "fmt" "time" ) func expensiveCall() {} func ExampleDuration() { t0 := time.Now() expensiveCall() t1 := time.Now() fmt.Printf("The call took %v to run.\n", t1.Sub(t0)) } var c chan int func handle(int) {} func ExampleAfter() { select { case m := <-c: handle(m) case <-time.After(5 * time.Minute): fmt.Println("timed out") } } func ExampleSleep() { time.Sleep(100 * time.Millisecond) } func statusUpdate() string { return "" } func ExampleTick() { c := time.Tick(1 * time.Minute) for now := range c { fmt.Printf("%v %s\n", now, statusUpdate()) } } func ExampleMonth() { _, month, day := time.Now().Date() if month == time.November && day == 10 { fmt.Println("Happy Go day!") } } func ExampleDate() { t := time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC) fmt.Printf("Go launched at %s\n", t.Local()) // Output: Go launched at 2009-11-10 15:00:00 -0800 PST } func ExampleTime_Round() { t := time.Date(0, 0, 0, 12, 15, 30, 918273645, time.UTC) round := []time.Duration{ time.Nanosecond, time.Microsecond, time.Millisecond, time.Second, 2 * time.Second, time.Minute, 10 * time.Minute, time.Hour, } for _, d := range round { fmt.Printf("t.Round(%6s) = %s\n", d, t.Round(d).Format("15:04:05.999999999")) } // Output: // t.Round( 1ns) = 12:15:30.918273645 // t.Round( 1us) = 12:15:30.918274 // t.Round( 1ms) = 12:15:30.918 // t.Round( 1s) = 12:15:31 // t.Round( 2s) = 12:15:30 // t.Round( 1m0s) = 12:16:00 // t.Round( 10m0s) = 12:20:00 // t.Round(1h0m0s) = 12:00:00 } func ExampleTime_Truncate() { t, _ := time.Parse("2006 Jan 02 15:04:05", "2012 Dec 07 12:15:30.918273645") trunc := []time.Duration{ time.Nanosecond, time.Microsecond, time.Millisecond, time.Second, 2 * time.Second, time.Minute, 10 * time.Minute, time.Hour, } for _, d := range trunc { fmt.Printf("t.Truncate(%6s) = %s\n", d, t.Truncate(d).Format("15:04:05.999999999")) } // Output: // t.Truncate( 1ns) = 12:15:30.918273645 // t.Truncate( 1us) = 12:15:30.918273 // t.Truncate( 1ms) = 12:15:30.918 // t.Truncate( 1s) = 12:15:30 // t.Truncate( 2s) = 12:15:30 // t.Truncate( 1m0s) = 12:15:00 // t.Truncate( 10m0s) = 12:10:00 // t.Truncate(1h0m0s) = 12:00:00 }