Time format conversion in golang

Time format conversion in golang

# go run test_time.go 127.0.0.1

test_time.go:

package main

import (
        "flag"
        "fmt"
        "gopkg.in/redis.v3"
        "log"
        "reflect"
        "strconv"
        "time"
)

func main() {
        flag.Parse()

        if flag.NArg() != 1 {
                log.Fatal("Please specify Redis server IP")
        }

        redisServer := flag.Args()[0]

        client := redis.NewClient(&redis.Options{
                Addr:     redisServer + ":6379",
                Password: "", // no password set
                DB:       0,  // use default DB
        })

        t := time.Now()

        // returns t as a Unix time, the number of nanoseconds elapsed since January 1, 1970 UTC
        t1 := t.UnixNano()

        // returns the string representation of t1 in 16 base
        t2 := strconv.FormatInt(t1, 16)

        t3, _ := strconv.ParseInt(t2, 16, 64)

        t4 := time.Unix(0, t3)

        fmt.Printf("t1: %v, %v\n", t1, reflect.TypeOf(t1))
        fmt.Printf("t2: %v, %v\n", t2, reflect.TypeOf(t2))
        fmt.Printf("t3: %v, %v\n", t3, reflect.TypeOf(t3))
        fmt.Printf("t4: %v, %v\n", t4, reflect.TypeOf(t4))

        err := client.Set("MyLastMod", t1, 0).Err()

        if err != nil {
                fmt.Printf("ERR: %s\n", err)
        }

        s, err := client.Get("MyLastMod").Int64()

        client.Close()

        if err != nil {
                fmt.Printf("ERR: %s\n", err)
        }

        fmt.Printf("Last Modified Time: %v %v\n", s, reflect.TypeOf(s))
}

Sample output:

t1: 1461628876922842766, int64
t2: 1448bfb832706e8e, string
t3: 1461628876922842766, int64
t4: 2016-04-25 17:01:16.922842766 -0700 PDT, time.Time
Last Modified Time: 1461628876922842766 int64