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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.
When you attempt to access an index beyond the length of a slice or the capacity of an array, the Go runtime will generate a panic. The following example makes the common mistake of attempting to access the last element of a slice using the length of the slice returned by the len builtin.
8 de ago. de 2018 · Closing the channels on the receiver side, and then trying to send on the same channel gives you the error. Better is to close the channel outside the go routine only after all values are sent on the channels.
Vimos varias formas en que se pueden producir panics en Go y la manera en que podemos recuperar el sistema cuando suceden usando la función builtin recover. Aunque es posible que no utilice panic, la recuperación adecuada ante panics es importante para que las aplicaciones de Go estén listas para la producción.
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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.
