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• example-flow-19.kt

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jvmTest.guide.example-flow-19.kt Maven / Gradle / Ivy

/*
 * Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
 */

// This file was automatically generated from flow.md by Knit tool. Do not edit.
package kotlinx.coroutines.guide.exampleFlow19

import kotlinx.coroutines.*
import kotlinx.coroutines.flow.*
import kotlin.system.*

fun simple(): Flow = flow {
    for (i in 1..3) {
        delay(100) // pretend we are asynchronously waiting 100 ms
        emit(i) // emit next value
    }
}

fun main() = runBlocking { 
    val time = measureTimeMillis {
        simple()
            .collectLatest { value -> // cancel & restart on the latest value
                println("Collecting $value") 
                delay(300) // pretend we are processing it for 300 ms
                println("Done $value") 
            } 
    }   
    println("Collected in $time ms")
}