Re: Wording in sequence definition [Was: The terms "sequence", "list", etc in Lua 5.2.0 (beta-rc1)]

[Roberto Ierusalimschy <roberto@...>]

> On Thu, Jun 16, 2011 at 4:41 PM, HyperHacker <hyperhacker@gmail.com> wrote:
> > Does that mean a table having keys 0, -1 or 1.5 no longer has a defined
> > length?
> 
> Would you mean a table just with keys like that, e..g {[0] = 1, [-1] =
> 2}? Because there #t was always zero.  It seems that if the table has
> an 'array part' (the [1..n] sequence) then #t gives the length of that
> array part. Certainly a lot of code does assume that one can add
> things to an 'array' in this way without upsetting the length
> operator.

We are considering the wording "positive numeric indices". So, indices
0 or -1 should not interfere with the sequence property. But I do not
think that it is a good idea to allow indices like 1.5.

-- Roberto