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// 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_Format() {
// layout shows by example how the reference time should be represented.
const layout = "Jan 2, 2006 at 3:04pm (MST)"
t := time.Date(2009, time.November, 10, 15, 0, 0, 0, time.Local)
fmt.Println(t.Format(layout))
fmt.Println(t.UTC().Format(layout))
// Output:
// Nov 10, 2009 at 3:00pm (PST)
// Nov 10, 2009 at 11:00pm (UTC)
}
func ExampleParse() {
// longForm shows by example how the reference time would be represented in
// the desired layout.
const longForm = "Jan 2, 2006 at 3:04pm (MST)"
t, _ := time.Parse(longForm, "Feb 3, 2013 at 7:54pm (PST)")
fmt.Println(t)
// shortForm is another way the reference time would be represented
// in the desired layout; it has no time zone present.
// Note: without explicit zone, returns time in UTC.
const shortForm = "2006-Jan-02"
t, _ = time.Parse(shortForm, "2013-Feb-03")
fmt.Println(t)
// Output:
// 2013-02-03 19:54:00 -0800 PST
// 2013-02-03 00:00:00 +0000 UTC
}
func ExampleParseInLocation() {
loc, _ := time.LoadLocation("Europe/Berlin")
const longForm = "Jan 2, 2006 at 3:04pm (MST)"
t, _ := time.ParseInLocation(longForm, "Jul 9, 2012 at 5:02am (CEST)", loc)
fmt.Println(t)
// Note: without explicit zone, returns time in given location.
const shortForm = "2006-Jan-02"
t, _ = time.ParseInLocation(shortForm, "2012-Jul-09", loc)
fmt.Println(t)
// Output:
// 2012-07-09 05:02:00 +0200 CEST
// 2012-07-09 00:00:00 +0200 CEST
}
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( 1µs) = 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( 1µs) = 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
}
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