Golang : Time slice or date sort and reverse sort example
Sorting time.Time
type and dates is pretty straight forward in Golang. Just curious why it is not included in the sort
package.
Here’s an example of sorting slice of time.Time
in Go.
package main
import (
"fmt"
"sort"
"time"
)
type timeSlice []time.Time
func (s timeSlice) Less(i, j int) bool { return s[i].Before(s[j]) }
func (s timeSlice) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
func (s timeSlice) Len() int { return len(s) }
var past = time.Date(2010, time.May, 18, 23, 0, 0, 0, time.Now().Location())
var present = time.Now()
var future = time.Now().Add(24 * time.Hour)
var dateSlice timeSlice = []time.Time{present, future, past}
func main() {
fmt.Println("Past : ", past)
fmt.Println("Present : ", present)
fmt.Println("Future : ", future)
fmt.Println("Before sorting : ", dateSlice)
sort.Sort(dateSlice)
fmt.Println("After sorting : ", dateSlice)
sort.Sort(sort.Reverse(dateSlice))
fmt.Println("After REVERSE sorting : ", dateSlice)
}
Sample output :
Past : 2010-05-18 23:00:00 +0800 SGT
Present : 2015-08-04 10:57:34.019368428 +0800 SGT
Future : 2015-08-05 10:57:34.019368476 +0800 SGT
Before sorting : [2015-08-04 10:57:34.019368428 +0800 SGT 2015-08-05 10:57:34.019368476 +0800 SGT 2010-05-18 23:00:00 +0800 SGT]
After sorting : [2010-05-18 23:00:00 +0800 SGT 2015-08-04 10:57:34.019368428 +0800 SGT 2015-08-05 10:57:34.019368476 +0800 SGT]
After REVERSE sorting : [2015-08-05 10:57:34.019368476 +0800 SGT 2015-08-04 10:57:34.019368428 +0800 SGT 2010-05-18 23:00:00 +0800 SGT]
Reference :
http://grokbase.com/t/gg/golang-nuts/136mm2bf2m/go-nuts-sort-timeslice
https://www.socketloop.com/tutorials/golang-sort-and-reverse-sort-a-slice-of-strings
See also : Golang : Sort and reverse sort a slice of strings
By Adam Ng
IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.
Advertisement
Tutorials
+4.9k Unix/Linux : How to open tar.gz file ?
+13.2k Golang : Recombine chunked files example
+4k JQuery : Calling a function inside Jquery(document) block
+20.3k Golang : Upload big file (larger than 100MB) to AWS S3 with multipart upload
+7.2k Golang : Find relative luminance or color brightness
+12.2k Golang : Image to ASCII art example
+4.5k Golang : Frobnicate or tweaking a string example
+3.9k Linux : How to set root password in Linux Mint
+6.8k Golang : Reverse a string with unicode
+7.6k Golang : Another camera capture GUI application with GTK and OpenCV
+10.6k Golang : Verify Linux user password again before executing a program example
+3.9k Golang : A program that contain another program and executes it during run-time