[Scilab-users] gcf()

[Adrien Vogt-Schilb]

On 29/07/2013 10:33, Dang, Christophe wrote:
> Hello,
>
>> De : Adrien Vogt-Schilb
>> Envoyé : vendredi 26 juillet 2013 23:29
>>
>> I thought that ==[] should be discouraged.
> For which reason?
>
> Regards
>
hey
I don't remember!

I remember that in general empty matrices are tricky when used with 
booleans, for instance this example displays nothing:

if find([1 2 3]==4)
  disp yes
end

if ~find([1 2 3]==4)
  disp no
end

and is therefore different from this one

if find([1 2 3]==4)
  disp yes
else
  disp no
end

I also vaguely remember that [] counts as true in some languages and 
false in some other languages. And that x==[] "should" return false for 
any x, but returns true is x is empty in scilab, which is not standard 
(if i remember well).
Quite far from the original winsid()==[] (which works fine btw), but the 
idea is to get used not to test empty matrices when coding because it's 
messy.
(again, I'm not sure about this)

-- Adrien Vogt-Schilb (Cired) +33 (0) 1 43 94 73 83