/
boring11.go
46 lines (41 loc) · 842 Bytes
/
boring11.go
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package main
import (
"fmt"
"time"
"math/rand"
)
func main(){
c := boring("Joe")
for {
select {
case s:= <-c:
fmt.Println(s)
case <-time.After(1 * time.Second):
fmt.Println("You're too slow.")
return
}
}
fmt.Println("You're both boring; I'm leaving.")
}
func fanIn(input1, input2 <-chan string) <-chan string {
c := make(chan string)
go func() {
for {
select {
case s := <-input1: c <- s
case s := <-input2: c <- s
}
}
}()
return c
}
func boring(msg string) <-chan string{ // Returns receive-only channel of strings.
c := make(chan string)
go func() { // We launch the goroutine from inside the function.
for i := 0; ; i++ {
c <- fmt.Sprintf("%s %d", msg, i)
time.Sleep(time.Duration(rand.Intn(2e3)) * time.Millisecond)
}
}()
return c // Return the channel to the caller.
}