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27 de ene. de 2016 · From the Go Language Spec: For a channel c, the built-in function close(c) records that no more values will be sent on the channel. It is an error if c is a receive-only channel. Sending to or closing a closed channel causes a run-time panic. Closing the nil channel also causes a run-time panic.
One of the most important properties of Go is that a channel is a first-class value that can be allocated and passed around like any other. A common use of this property is to implement safe, parallel demultiplexing.
6 de feb. de 2019 · You are using panic incorrectly. You should only panic when there was a programming error. Avoid using panics unless you believe taking down the program is a reasonable response to what happened. In this case, I would just return the error, not panic. You are panicing during your panic. What is happening is that you are first ...
If you would close a channel from the receiver side or in one of the multiple senders of the channel anyway, then you can use the recover mechanism to prevent the possible panic from crashing your program.
Sending on a closed channel will cause a panic. Another note: Channels aren't like files; you don't usually need to close them. Closing is only necessary when the receiver must be told there are no more values coming, such as to terminate a range loop.
9 de nov. de 2023 · Issue 1: Two goroutines send into the same channel. Hence neither of them can close the channel once ready, because the other goroutine would then write to a closed channel and panic. Solution 1: use a separate “done” channel to signal that a goroutine is done.
10 de nov. de 2022 · The sender entity should close the channel, exactly to avoid sending on a closed channel (which causes a runtime panic). If there are multiple senders, they must be coordinated and the channel only closed when all senders are done.
