If I do:

player.SetSegment ("A", "Low");

and immediately after:

var segments = player.getSegments ();

1) I'm guaranteed to get { "A": "Low" } in segments, right? It's this way in my tests, but I just wanted to make sure that this is a guarantee and MongoDB won't handle the request asynchronously in some cases. 

2) Also, the same question, for the case of a random MongoDB update command on a runtime collection.

Thanks,

Baris

Thanks Oisin, a definitive answer would be great. 

I use things like "var segments = player.getSegments ();" in modules, so that the module is independent of the script using the module, but I always worry about this a bit.