xref: /aosp_15_r20/external/kotlinx.coroutines/kotlinx-coroutines-core/jvm/test/guide/example-flow-23.kt (revision 7a7160fed73afa6648ef8aa100d4a336fe921d9a)

// This file was automatically generated from flow.md by Knit tool. Do not edit.
package kotlinx.coroutines.guide.exampleFlow23

import kotlinx.coroutines.*
import kotlinx.coroutines.flow.*

fun requestFlow(i: Int): Flow<String> = flow {
    emit("$i: First")
    delay(500) // wait 500 ms
    emit("$i: Second")
}

fun main() = runBlocking<Unit> {
    val startTime = currentTimeMillis() // remember the start time
    (1..3).asFlow().onEach { delay(100) } // emit a number every 100 ms
        .flatMapConcat { requestFlow(it) }
        .collect { value -> // collect and print
            println("$value at ${currentTimeMillis() - startTime} ms from start")
        }
}