Go Standard Library Cookbook

How to do it...

1. Open the console and create the folder chapter10/recipe02.
2. Navigate to the directory.
3. Create the file map.go with the following content:

        package main        import (          "fmt"          "sync"        )        var names = []string{"Alan", "Joe", "Jack", "Ben",                             "Ellen", "Lisa", "Carl", "Steve",                             "Anton", "Yo"}        func main() {          m := sync.Map{}          wg := &sync.WaitGroup{}          wg.Add(10)          for i := 0; i < 10; i++ {            go func(idx int) {              m.Store(fmt.Sprintf("%d", idx), names[idx])              wg.Done()            }(i)          }          wg.Wait()          v, ok := m.Load("1")          if ok {            fmt.Printf("For Load key: 1 got %v\n", v)          }          v, ok = m.LoadOrStore("11", "Tim")          if !ok {            fmt.Printf("Key 11 missing stored val: %v\n", v)          }          m.Range(func(k, v interface{}) bool {            key, _ := k.(string)            t, _ := v.(string) fmt.Printf("For index %v got ...