Re: Lua 5.2 Length Operator and tables (bug?)

[Matthew Wild <mwild1@...>]

On 16 April 2012 11:35, Jose Torre-Bueno <jtorrebueno@cox.net> wrote:
>

> Is there any way other than probing as Carl did to find out how Lua has organized a table or even to predict what ipairs will do?
>
>  Perhaps the message is dont ask because the parser is free to reorganize a table whenever it wants which suggests that # has very limited usefulness.  It seems that if a table has valid  elements from index 1 to n # will return n but the reverse is not true so # cannot be used to learn if a table includes a fully populated array.

Attempting to define explicitly undefined behaviour is just not a good
idea. It will easily lead you down the road of portability and
compatibility problems.

Regards,
Matthew