WaitNext

WaitNext[{eid1,eid2,…}] waits until the first evaluation represented by any of the eidi finishes, then returns its result, the corresponding eidi, and the list of remaining eidk.

WaitNext[{eid1,eid2,…},h] wraps the head h around the result before returning it.

Examples

Wait for the first parallel evaluation to complete:

eids = ParallelSubmit /@ {Pause[1]; 1, Pause[2]; 2};
{result, eid, rest} = WaitNext[eids]

Please visit the official Wolfram Language Reference for more details.