>function par_map(iterable $it, callable $c) {
> $result = [];
> async {
> foreach ($it as $val) {
> $result[] = $c($val);
> }
> }
>return $result;
>}
If the assumption is that each call can be asynchronous and all elements
need to be processed, the only proper tool is a concurrent iterator.
Manually using a foreach loop is not the best idea because the iterator
does not necessarily create a coroutine for each iteration.
And, of course, such an iterator should have a getFuture method that allows
waiting for the result.
Yes, Kotlin has an explicit blocking Scope, but I don’t see much need for
it. So far, all the cases we’re considering fit neatly into a framework:
1. I want to launch a coroutine and wait: await spawn
2. I want to launch a coroutine and not wait: spawn
3. I want to launch a group of coroutines and wait: await CoroutineScope
4. I want to launch a group of coroutines and not wait: spawn
5. I want a concurrent iteration: special iterator.
What else are we missing?
