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On Mon, Jan 3, 2011 at 5:24 AM, Axel Kittenberger <> wrote:
>> O(1) implementation is possible if really needed, requires work on
>> __newindex too.
> I really want to see that! Cause I doubt it.

I guess Dirk means for a __len = number of 'non anonymous' items. ie
those with non-integer keys.

for that simply use a proxy table, keep a 'n' private variable,
increment for any k,v where k=>not integer and v ~= nil, decrease for
k=>not integer and v==nil