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**Subject**: **Re: 5.2 work3 manual**
**From**: Roberto Ierusalimschy <roberto@...>
**Date**: Mon, 7 Jun 2010 11:28:49 -0300

> On 7 June 2010 02:53, Javier Guerra Giraldez <javier@guerrag.com> wrote:
> > On Sun, Jun 6, 2010 at 8:13 PM, T T <t34www@googlemail.com> wrote:
> >> Which makes me wonder why #t is not specified in such a way to be
> >> usefull for tables with holes too.
> [...]
>
> The one given in the starting message of this thread seems to be the
> most suitable from the "usefulness" POV:
>
> "The length of a table t is defined to be the least non-negative
> integer n such that t[n+1] is nil and t[m] is non-nil for any
> positive integer m less than n+1."?
>
> In other words #t would return size of the array part that is without holes.
What is this useful for?
-- Roberto