One trick that can often come in handy, and we haven't yet addressed, is the ability to have what is effectively a typeless channel.
If you're wondering why that might be useful, the short answer is concise code and application design thrift. Often this is a discouraged tactic, but you may find it useful from time to time, especially when you need to communicate one or more disparate concepts across a single channel. The following is an example of an indeterminate channel type:
package main
import (
"fmt"
"time"
)
func main() {
acceptingChannel := make(chan interface{})
go func() {
acceptingChannel <- "A text message"
time.Sleep(3 * time.Second)
acceptingChannel <- false
}()
for {
select {
case msg := <- acceptingChannel:
switch typ := msg.(type) {
case string:
fmt.Println("Got text message",typ)
case bool:
fmt.Println("Got boolean message",typ)
if typ == false {
return
}
default:
fmt.Println("Some other type of message")
}
default:
}
}
<- acceptingChannel
}..................Content has been hidden....................
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