Re: Call to __len metamethod has userdata/table twice on stack

[tobias@...]

Quoting "Soni L." <fakedme@gmail.com>:

> Also with unm and bnot:
>
> "For the unary operators (negation, length, and bitwise NOT), the  
> metamethod is computed and called with a dummy second operand, equal  
> to the first one. This extra operand is only to simplify Lua's  
> internals (by making these operators behave like a binary operation)  
> and may be removed in future versions. (For most uses this extra  
> operand is irrelevant.)"

Thanks guys, should have dived deeper into the manual.

 -Tobias