Sebastian wrote:
> Given that // is not acceptable, as others sarcastically reminded me,
> and that this introduces new sytax, I think it might be best just to
> add more functions. I don't think something like
> 
> 
>>$d = first-existing: $a, $b, $c;
> 
> 
> is any better than first_existing($a, $b, $c), and the former happens
> at the expensive of inconsistency and a higher learning curve.

au contraire.  The first happens without a name collision with any
user-space functions.

Greg

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