Re: Tables, Metatables, Children, and Length

[spir <denis.spir@...>]

On 04/12/2012 02:44, Marc Lepage wrote:
> Hi, I have a table which has a metatable. I want to add children (other
> tables) to the metatable, not to the table directly.
>
> If I do so, I can get at them by t[1], t[2], t[3] and so on.

This means you customised __index, right?

> But I can't do this:
>
> for i = 1, #t do
>      local child = t[i]
> end
>
> Because #t still returns 0.

If so (unless i'm wrong), why don't you just customise __newindex, too, to 
maintain an up-to-date item count ('n' is often used in Lua). Then
   for i = 1, t.n do ... end
I would find this coherent.

Denis