Request race as described here: https://blog.golang.org/go-concurrency-patterns-timing-out-and

race.go

package main

import (
	"fmt"
	"math/rand"
	"time"
)

type Server string

func (s *Server) DoQuery(url string, i int) []byte {

	rand.Seed(time.Now().UnixNano())
	rnd := rand.Intn(10)

	fmt.Printf("%v is taking %v seconds to repsond\n", *s, rnd)
	time.Sleep(time.Duration(rnd) * time.Second)

	return []byte(*s + " wins: Here be dragons!")
}

func main() {
	fmt.Println(string(doSomething()))
}

func doSomething() []byte {
	var s = []Server{"server 1", "server 2", "server 3"}

	task := "task"

	return Query(s, task)

}
func Query(list []Server, task string) []byte {
	var ch = make(chan []byte, 1)
	i := 0
	for _, s := range list {
		go func(c Server) {
			select {
			case ch <- c.DoQuery(task, i):
				fmt.Println("Done")
			default:
			}
		}(s)
		i++
	}
	defer close(ch)
	return <-ch
}