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// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package ring_test
import (
"container/ring"
"fmt"
)
func ExampleRing_Len() {
// Create a new ring of size 4
r := ring.New(4)
// Print out its length
fmt.Println(r.Len())
// Output:
// 4
}
func ExampleRing_Next() {
// Create a new ring of size 5
r := ring.New(5)
// 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 and print its contents
for j := 0; j < n; j++ {
fmt.Println(r.Value)
r = r.Next()
}
// Output:
// 0
// 1
// 2
// 3
// 4
}
func ExampleRing_Prev() {
// Create a new ring of size 5
r := ring.New(5)
// 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:
// 4
// 3
// 2
// 1
// 0
}
func ExampleRing_Do() {
// Create a new ring of size 5
r := ring.New(5)
// 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 and print its contents
r.Do(func(p any) {
fmt.Println(p.(int))
})
// Output:
// 0
// 1
// 2
// 3
// 4
}
func ExampleRing_Move() {
// Create a new ring of size 5
r := ring.New(5)
// 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()
}
// Move the pointer forward by three steps
r = r.Move(3)
// Iterate through the ring and print its contents
r.Do(func(p any) {
fmt.Println(p.(int))
})
// Output:
// 3
// 4
// 0
// 1
// 2
}
func ExampleRing_Link() {
// Create two rings, r and s, of size 2
r := ring.New(2)
s := ring.New(2)
// Get the length of the ring
lr := r.Len()
ls := s.Len()
// Initialize r with 0s
for i := 0; i < lr; i++ {
r.Value = 0
r = r.Next()
}
// Initialize s with 1s
for j := 0; j < ls; j++ {
s.Value = 1
s = s.Next()
}
// Link ring r and ring s
rs := r.Link(s)
// Iterate through the combined ring and print its contents
rs.Do(func(p any) {
fmt.Println(p.(int))
})
// Output:
// 0
// 0
// 1
// 1
}
func ExampleRing_Unlink() {
// 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()
}
// Unlink three elements from r, starting from r.Next()
r.Unlink(3)
// Iterate through the remaining ring and print its contents
r.Do(func(p any) {
fmt.Println(p.(int))
})
// Output:
// 0
// 4
// 5
}