Synchronization of goroutines
This lesson shows how closing or blocking a pattern, brings effective integration between goroutines.
We'll cover the following...
Channels can be closed explicitly. However, they are not like files. You don’t usually need to close them. Closing a channel is only necessary when the receiver must be told that there are no more values coming. Only the sender should close a channel, never the receiver.
Closing a channel
The question is, how can we signal when sendData() is done with the channel, and how can getData() detect that the channel whether closed or blocked?
Signaling
This is done with the function close(ch). This marks the channel as unable to accept more values through a send operation <-. Sending to or closing a closed channel causes a run-time panic. It is good practice to do ...