Re: default values of 'false' in data description

["Thomas Blom" <thomasblom@...>]

On Wed, 13 Sep 2006 13:49:44 -0500, Shmuel Zeigerman <shmuz@actcom.co.il>  
wrote:

> Thomas Blom wrote:
> >  If I want the parameter "loop" for a sound to default to true when  
> > unspecified I thought I would write:
> >  shouldLoop = sounds[1].loop or true  -- (nil or true) => true
> >  but then it doesn't work for the second entry:
> >  shouldLoop = sounds[2].loop or true  -- (false or true) => true
> >  This was a bit of a surprise, since (nil or false) => false.
> >   What's the elegant idiom for this situation?
>
> shouldLoop = sounds[i].loop == nil
Thanks for the responses; this one doesn't quite work: if loop=true, then  
shouldLoop will be false.  (The user should be able to specify loop, even  
if it defaults to true)

-t



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