Re: A little bit about nothing (was Re: Empty? No. Array? No. Has? Yes.)
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- Subject: Re: A little bit about nothing (was Re: Empty? No. Array? No. Has? Yes.)
- From: Pierre-Yves Gérardy <pygy79@...>
- Date: Wed, 3 Jul 2013 18:55:26 +0200
Sorry for the noise, either the list or gmail is lagging.
-- Pierre-Yves
On Wed, Jul 3, 2013 at 6:53 PM, Pierre-Yves Gérardy <pygy79@gmail.com> wrote:
> On Wed, Jul 3, 2013 at 6:20 PM, Sean Conner <sean@conman.org> wrote:
>>
>> function something(mary) --[[ something about mary ]] end
>>
>> In straight Lua, there is no way for something to know if it was called
>> like:
>>
>> something()
>>
>> or
>>
>> something(nil)
>
> function something(...)
> if select('#',...) == 0 then
> -- something about nothing
> else
> local mary = ...
> -- something about mary
> end
> end
>
> That being said, it is not concise.
>
> -- Pierre-Yves