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Junior — Middle

How do you organize parallel execution of operations inside a suspend function in Kotlin?

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Answer from AI

To perform parallel operations inside a suspend function in Kotlin, coroutines and the async function combined with await are typically used. This allows multiple asynchronous tasks to run concurrently and then wait for their completion.

Example:

suspend fun fetchData(): List<String> = coroutineScope {
    val deferred1 = async { fetchFromNetwork1() }
    val deferred2 = async { fetchFromNetwork2() }

    val result1 = deferred1.await()
    val result2 = deferred2.await()

    listOf(result1, result2)
}

Here, async launches tasks in parallel, and await waits for their completion. It is important to use coroutineScope or supervisorScope for proper coroutine lifecycle management inside a suspend function.