Prev() function of ring package is used to returns the previous ring element in go where ring must not be empty.
Prev() function prototype of ring package:
func (r *Ring) Prev() *Ring
Return type in Prev() function of ring package:
Prev() returns the previous ring element. It's a Ring type.
Example of Prev() function in ring package:
package main
import (
"container/ring"
"fmt"
)
func main() {
// Create a new ring of size 6
r := ring.New(6)
// Get the length of the ring
n := r.Len()
// Initialize the ring with some integer values
for i := 0; i < n; i++ {
r.Value = i
r = r.Next()
}
// Iterate through the ring backwards and print its contents
for j := 0; j < n; j++ {
r = r.Prev()
fmt.Println(r.Value)
}
}
Output:
5 4 3 2 1 0
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