dynamic selection grid?

Is there any way dynamically load a selectionGrids string array?

I have this currently.

private var selGridStrings:String[]; 

but unlike a regular array, I and like `.add` or `.push` new variables into it to expand it. I just need to do this on start but still it is populating the selection grid with files read from a directory so I was wondering if there is a dynamic way to do it?

No, but you can just convert a dynamic array to String[] array, using ToArray if it's a List or ToBuiltin if you're using the JS Array class.