Jean-Christophe Deschamps wrote:
>> Yours returns 1 or 0. Mine returns length if found, otherwise 0.
> 
> That's true but the subject title led me to believe that the OP
> intended to have a 0 vs. nonzero return for not-exists vs exists condition.

Perhaps. Nevertheless, the answer to your specific question, namely "isn't the 
following exactly the same?", is no.
-- 
Igor Tandetnik

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