October 2021
Intermediate to advanced
500 pages
16h 23m
English
Content preview from Kotlin Programming: The Big Nerd Ranch Guide, 2nd Edition
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Closing a Channel
You saw in Chapter 21 that flows can complete, meaning they emit no more items. And flow termination can happen in a few different ways; in the case of the flow builder that accepts a lambda expression, the flow implicitly completes when the lambda expression returns.
Similarly, channels can close, so that no additional values can be sent or received through the channel. But the channels you have created so far have no way to implicitly close themselves. You need to explicitly call close on the channels when you are finished emitting items.
You will need two calls to close. The first close call will be on passengerNamesChannel. Closing this channel will allow your workers to complete. If this channel does not ...
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