Golang | Panics when using channels

[deoren]

• https://play.golang.org/p/6YOdxkZUzR5

  • send on a closed channel

• https://play.golang.org/p/vMkhWT9AUfS

  • closing a channel that is already closed

• https://play.golang.org/p/a8ozOryewDh

  • send on a nil channel

• https://play.golang.org/p/M13L14Nn-eQ

  • read from a nil channel: all go routines are asleep

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I'm new to using channels (really, Go in general), so I'll need to study these further, particularly attempting to close a channel that is already closed.