question: check an async.queue to see if a matching task has already been inserted?

[PsyTae]

Is there anyway to look at the tasks of a current queue to determine if the task you are about to put in might already match a task currently in the queue?

[aearly]

There is no officially sanctioned way to iterate the queue. There is a q._tasks property that exposes the underlying linked list for the queue. You can either iterate the linked list, or call q._tasks.toArray().find(...) to see if your task already exists.

This is an implementation detail, so it is not documented. It might break in the future if we change how the queue works internally.

[aearly]

Although, as an enhancement to the queue, we could expose a q[Symbol.iterator] property for exposing an implementation-agnostic way to iterate the current items of the queue.

[ofek-a]

I would also like this feature, many other queues have this feature.
q.contains(task) would be very useful!