Traversing all directories and listing all file objects

Hi
I am wondering if someone can help me out.
In IFS, I would like to traverse recursively down all directories starting from a particular directory to be set by me, and collect all objects that are file objects, say in an Array of PublicObjects. However the listing should exclude folder objects. Obviously the folder objects would be used to traverse further down the directory tree and collect more (file) PublicObjects.
I have tried a few things but I can't seem to distinguish between folder and file objects. If someone could provide me with a code example to get me started that would be tremendously appreciated.
Thanks very much.
Hugo

Can you not just test for an instance of Folder?

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Traversing all directories and listing all file objects

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