Unlink() function of ring package is used to remove the element from ring in go where ring must not be empty.
Unlink removes n % (r.Len()) elements from the ring r and It will start from at r.Next(). If n % (r.Len()) == 0 then r remains unchanged.
Unlink() function prototype of ring package:
func (r *Ring) Unlink(n int) *Ring
Return type in Unlink() function of ring package:
Unlink() returns ring type pointer to deleted ring element. It's a Ring type.
Example of Unlink() 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 elements
fmt.Println("Ring elements are: ")
r.Do(func(p any) {
fmt.Println(p.(int))
})
// Unlink three elements from r, starting from r.Next()
x := r.Unlink(3)
// Iterate through the deleted ring elements
fmt.Println("\nIterate through the deleted ring elements")
x.Do(func(p any) {
fmt.Println(x.Value)
x = x.Next()
})
// Iterate through the remaining ring elements
fmt.Println("\nIterate through the remaining ring elements after deleting")
r.Do(func(p any) {
fmt.Println(p.(int))
})
}Output:
Ring elements are: 0 1 2 3 4 5 Iterate through the deleted ring elements 1 2 3 Iterate through the remaining ring elements after deleting 0 4 5
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