package main

import (
	"fmt"
	"time"
)
//Go's select lets you wait on multiple channel
//operations combining goroutines and channels with select
//is a powerful feature of go
func main(){
	//For our example well select across two channels.
	c1 := make(chan string)
	c2 := make(chan string)


	//each channel will receive a value after some
	//amount of time, to simulate e.g. blocking RPC
	//operations executing in concurrent goroutines
	go func(){
		time.Sleep(1*time.Second)
		c1 <- "one"
	}()
	go func(){
		time.Sleep(2*time.Second)
		c2 <- "two"
	}()


	//we'll use select to await both of these values
	//simultaneously, printing each one as it arrives.
	for i := 0; i < 2; i++ {
		select{
			case msg1 := <-c1:
				fmt.Println("received", msg1)
			case msg2 := <-c2:
				fmt.Println("received", msg2)
		}
	}
}