Mastering Go - Second Edition

Using container/ring

This section will illustrate the use of the container/ring package using the Go code of conRing.go, which will be presented in four parts. Note that the container/ring package is much simpler than both container/list and container/heap, which means that it contains fewer functions than the other two packages.

The first code segment of conRing.go follows:

package main 
 
import ( 
    "container/ring" 
    "fmt" 
) 
 
var size int = 10 

The size variable holds the size of the ring that is going to be created.

The second part of conRing.go contains the following Go code:

func main() { myRing := ring.New(size + 1) fmt.Println("Empty ring:", *myRing) for i := 0; i < myRing.Len()-1; i++ { myRing.Value = i myRing = myRing.Next() } myRing.Value ...