Extension functions of parallel iteration over collections in Kotlin (map and forEach equivalents)

Async.kt

import kotlinx.coroutines.async
import kotlinx.coroutines.awaitAll
import kotlinx.coroutines.coroutineScope

suspend fun <T> Collection<T>.forEachAsync(action: suspend (T) -> Unit) =
    coroutineScope {
        map { item ->
            async { action(item) }
        }.awaitAll()
    }

suspend fun <T, R> Collection<T>.mapAsync(transform: suspend (T) -> R): List<R> =
    coroutineScope {
        map { item ->
            async { transform(item) }
        }.awaitAll()
    }