Not happening. If you compile something to Lua assigning a key to nil will erase it, python and javascript will keep it. Pheraps making a special NullObject value to fill these slots would be a good idea, but you could not interact seamlessly with the target system and probably get a speed penalty.
Having the exact behavoir in all platforms is not possible in some cases, and these are the cases left 'undefined' in the handbook.
Having the exact behavoir in all platforms is not possible in some cases, and these are the cases left 'undefined' in the handbook.
Hope this clears things a bit ;)
Cheers, -Shogun