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(1) I have seen it mentioned that "setglobals" does not work on native C
functions and I was wondering why. Is this by design? Or is it due to
technical difficulties?

(2) Why do metamethods have a double underscore prefix? That seems to imply
that the metatable will be filled with other, otherwise conflicting,
entries.

*cheers*
Peter Hill.

Ki: Contractors... high-paid leeches stealing our work.
Fooker: If you think of them as disposable employees, you'll feel much
better...