[Date Prev][Date Next][Thread Prev][Thread Next]
[Date Index]
[Thread Index]
- Subject: Re: [ANN] Lua 5.2.0 (alpha) now available
- From: Petite Abeille <petite_abeille@...>
- Date: Sun, 12 Dec 2010 20:56:18 +0100
On Dec 12, 2010, at 8:30 PM, Enrico Colombini wrote:
>> t[1] is quicker than #t> 0, especially if t is a long array.
> > (Not my idea, Javier Guerra pointed this out in
> > http://lua-users.org/lists/lua-l/2008-03/msg00540.html)
>
> Interesting... I always thought #t required constant time.
> However, t[1] is not equivalent to #t if the 'array' has a hole in t[1].
Alternatively:
type( next( t ) ) == 'number'
