Charm++ parallel programming system

[Pascal <zetwal AT gmail.com>]

Hello

I have a chare array like this:

array [1D] Node{

...

}

in which I put in values of type Node. Initially there is only one chare but then the chare generates other chares which in turn generate other chares (and deletes itself) which are inserted at specific locations in the array. Thus there might be gaps in the array. 

Is there a way for me to query the array like this: thisProxy[randomIndex] and it will tell me if there is an element in that location or not?

In other words, how do I know if a chare exists in a chare array?

Thanks

Cheers,
Pascal