Re: Does PIL (3rd edition) repeatedly misuse the length operator on tables and invoke undefined behavior?

[polyglot@...]

On 2014-09-18 04:07, Coda Highland wrote:
> On Wed, Sep 17, 2014 at 8:47 AM,  <polyglot@openmailbox.org> wrote:
> > "We use the term sequence to denote a table where the set of all 
> > positive
> > numeric keys is equal to {1..n} for some integer n, which is called 
> > the
> > length of the sequence (see §3.4.6)."
>
> n = -42 doesn't count because the definition specifically says
> "positive numeric keys".

Why would n = 0 count but n = -42 not count? They're both
integers, and neither is a positive numeric key.