package main
import "fmt"
import "time"
func main() {
p := fmt.Println
// We'll start by getting the current time.
now := time.Now()
p("time.Now(): ", now)
// You can build a "time" struct by providing the
// year, month, day, etc. Times are always associated
// with a "Location", i.e. time zone.
then := time.Date(2009, 11, 17, 20, 34, 58, 651387237, time.UTC)
p("time.Date(): ", then)
p("==================================")
// You can extract the various components of the time
// value as expected.
p("time.Date().Year(): ", then.Year())
p("time.Date().Month(): ", then.Month())
p("time.Date().Day(): ", then.Day())
p("time.Date().Hour(): ", then.Hour())
p("time.Date().Minute(): ", then.Minute())
p("time.Date().Second(): ", then.Second())
p("time.Date().Nanosecond(): ", then.Nanosecond())
p("time.Date().Location(): ", then.Location())
// The Monday-Sunday "Weekday" is also available.
p("time.Date().Weekday(): ", then.Weekday())
p("==================================")
// These methods compare two times, testing if the
// first occurs before, after, or at the same time
// as the second, respectively.
p("time.Date().Before(now): ", then.Before(now))
p("time.Date().After(now): ", then.After(now))
p("time.Date().Equal(now): ", then.Equal(now))
p("==================================")
// The "Sub" methods returns a "Duration" representing
// the interval between two times.
diff := now.Sub(then)
p("time.Now().Sub(time.Date()): ", diff)
p("==================================")
// We can compute the length of the duration in
// various units.
p("time.Date().Sub(then).Hours(): ", diff.Hours())
p("time.Date().Sub(then).Minutes(): ", diff.Minutes())
p("time.Date().Sub(then).Seconds(): ", diff.Seconds())
p("time.Date().Sub(then).Nanoseconds(): ", diff.Nanoseconds())
p("==================================")
// You can use "Add" to advance a time by a given
// duration, or with a "-" to move backwards by a
// duration.
p("time.Date().Sub(now).Add(now.Sub(then)): ", now.Add(diff))
p("time.Date().Sub(then).Add(-(now.Sub(then))): ", then.Add(-diff))
}
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