Reverse string example using defer/go routines/wait groups

reverse.go

package main

import "fmt"
import "sync"

var wg sync.WaitGroup

func reverse(i string) (o string) {
	for _, v := range i {
		defer func(r rune) {
			o += string(r)
		}(v)
	}
	return
}

func main() {
	for _ = range make([]int, 10) {
		wg.Add(1)
		go func() {
			defer wg.Done()
			fmt.Println(reverse("picat"))
		}()
	}
	wg.Wait()
}