Re: Suspicious table initialization

[Grzegorz Krasoń <grzegorz.krason@...>]

Thank you for the answers and references. It is clear now!

On Tue, 27 Oct 2020 at 20:53, Javier Guerra Giraldez <javier@guerrag.com> wrote:

On Tue, 27 Oct 2020 at 14:27, Grzegorz Krasoń <grzegorz.krason@gmail.com> wrote:
>
> How to understand the difference between t1 and t2 in the example below? They give the same results while iterating, but `#` returns different values.
> Is this expected?

yes

> > t1 = {[3] = 100}
> > t2 = {nil, nil, 100}

these are two different tables with equal contents.  the difference is
that they are independent objects.

the `#` operator returns a number such that t[#t+1] == nil and either
#t == 0 or t[#t] ~= nil.

in both t1 and t2 it would be valid to return either 0 or 3.  which
one is undefined.


--
Javier