Support collection operations

[clue]

What is the recommended way to wait for a timeout of multiple promises?

react/promise provides several promise collection primitives, which all have valid use cases.

One might assume the following is the way to go:

$promises = array(
    accessSomeRemoteResource(),
    accessSomeRemoteResource(),
    accessSomeRemoteResource()
);

$promise = \React\Promise\all($promises);

Timer\timeout($promise, 10, $loop)->then(function ($values) {
    // *all* promises resolved
});

How does this cope with cancellation support? (Refs #9 and #3)

[clue]

The above example is also part of the documentation (#14). However, it does currently not describe how cancellation of promise collections works.

[jsor]

Cancellation of promise collections should be handled within react/promise but is currently not supported. Calling cancel() on the promise returned by all/any/some etc. could be forwarded to all promises of the collection.

[clue]

Cancellation of promise collections should be handled within react/promise but is currently not supported.

Thanks the feedback! I've just filed reactphp/promise#33 to keep track of this.

[clue]

In the meantime, we might consider adding helper functions like timeoutAll($promises) etc.?

[jsor]

I think we should better invest the time to implement this cleanly in react/promise. Will look at it in the next week.

[jsor]

See reactphp/promise#36

[clue]

I agree that it makes more sense to keep relying on promise primitives instead of duplicating similar logic here 👍

I'll assume this is resolved and will close this for now, please feel free to report back otherwise 👍