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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 interface{}) { 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 interface{}) { 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 interface{}) { 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 interface{}) { fmt.Println(p.(int)) }) // Output: // 0 // 4 // 5 }