blob: 9673a1b30fec20876a5362c78b534ccd55515748 [file] [log] [blame]
// +build OMIT
package main
import (
"fmt"
"math/rand"
"time"
)
// START1 OMIT
func main() {
c := boring("Joe")
for {
select {
case s := <-c:
fmt.Println(s)
case <-time.After(1 * time.Second): // HL
fmt.Println("You're too slow.")
return
}
}
}
// STOP1 OMIT
// START2 OMIT
func boring(msg string) <-chan string { // Returns receive-only channel of strings. // HL
c := make(chan string)
go func() { // We launch the goroutine from inside the function. // HL
for i := 0; ; i++ {
c <- fmt.Sprintf("%s: %d", msg, i)
time.Sleep(time.Duration(rand.Intn(1500)) * time.Millisecond)
}
}()
return c // Return the channel to the caller. // HL
}
// STOP2 OMIT
// START3 OMIT
func fanIn(input1, input2 <-chan string) <-chan string { // HL
c := make(chan string)
go func() {
for {
select {
case s := <-input1:
c <- s
case s := <-input2:
c <- s
}
}
}()
return c
}
// STOP3 OMIT