very simple example of concurrency in go.

main.go

package main

import (
	"fmt"
	"net/http"
)

func main() {
	links := []string{
		 "http://golang.org",
		 "http://google.com",
		 "http://stackoverflow.com",
		 "http://facebook.com",
		 "http://amazon.com",
		 "http://netflix.com",
	}

	c := make(chan string)

	for _, link := range links {
		go checkLink(link, c)
	}

	for i := 0; i < len(links); i++ {
		fmt.Println(<- c)
	}	
}

func checkLink(link string, c chan string) {
	_, err := http.Get(link)
	if err != nil {
		fmt.Println(link, "seems to be down.")
		c <- "might be down I think"
		return
	}

	fmt.Println(link, "looks good.")
	c <- "yup, thats good."
}