In this lesson, you’ll explore combining operators in Kotlin Flow. These operators let you merge and join
multiple data flows. You’ll cover the following operators:
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The zip Operator
Suppose you have two flows: one for different carrot types and another for various
carrot processing techniques. You can use zip to combine these flows into a single flow that pairs each carrot type
with a processing method:
val carrotTypes = flowOf("Nantes", "Imperator", "Chantenay")
val processingMethods = flowOf("Wash", "Peel", "Chop")
fun processCarrots(): Flow<Pair<String, String>> =
carrotTypes.zip(processingMethods) { type, method -> type to method }
.collect { pair ->
println("Carrot type: ${pair.first}, Processing method: ${pair.second}")
}
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The combine Operator
Now, suppose you have two flows: one for the current temperature in the carrot
factory and another for the humidity level. You want to create a flow that emits the latest temperature and humidity
when either changes:
In this lesson, you’ve explored key combining operators in Kotlin Flow, including zip and combine. You’ve seen
how these operators can be used to merge multiple flows, letting you create more complex data processing pipelines
and respond to changes in real time.
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This content was released on Jun 5 2024. The official support period is 6-months
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