package container/ring
Move moves the given input (n) elements backward (n < 0) or forward (n >= 0) in the ring and returns that ring element. The ring that needs to be moved, must not be empty.
Golang container/ring.Ring.Move function usage example
package main
import (
"container/ring"
"fmt"
)
func main() {
r := ring.New(10)
// populate our ring
for i := 0; i < 10; i++ {
r.Value = i
r = r.Next()
}
f := func(v interface{}) {
fmt.Printf("%d ", v)
}
// Values in r before move
fmt.Println("Values in r BEFORE move")
r.Do(f)
fmt.Println()
moved := r.Move(2)
// Values in r AFTER move
fmt.Println("Values in r AFTER moving 2 positive")
moved.Do(f)
fmt.Println()
movedagain := moved.Move(-2)
// Values in r AFTER move
fmt.Println("Values in r AFTER moving 2 negative")
movedagain.Do(f)
fmt.Println()
}
Output :
Values in r BEFORE move
0 1 2 3 4 5 6 7 8 9
Values in r AFTER moving 2 positive
2 3 4 5 6 7 8 9 0 1
Values in r AFTER moving 2 negative
0 1 2 3 4 5 6 7 8 9
Reference :
http://golang.org/pkg/container/ring/#Ring.Move
