need to take the N-th element from a queue

[Bob_Schor]

The usual way to make something "high priority" is to put it on the beginning of the Queue instead of on the end.  This forces it to be the next thing that is dequeued, a "Do This First!!" instruction.  That's the purpose of Enqueue Element at Opposite End.  Some of the banter between natasftw and me was about using this function, which I called "Push", as this turns the Queue (a First In, First Out structure) into a Stack (a Last In, First Out structure).  Of course, if you "mix metaphors" by putting high priority items at the front of the Queue, it becomes "something else", namely a "Queue with a High Priority Input" ...

Bob Schor

[Ben]

I fell like I am offering and rope that can be used to hang yourselves ....

Wrap-up the assorted queue opeartions in an

Spoiler

(wait for it)

Action Engine!

As long as all of the operations are done inside the AE you can prevent other loops from inserting while you are abusing the queue.

Spoiler

Abuse - THe beuty of the queue is can operate in-place. THe destroy delete re-queue defiles that beuteous function.

Ben