> Le 23 sept. 2016 à 20:45, Peter Bozek <[email protected]> a écrit :
> 
> [...] I use following test for empty UUID:
> 
> $0:=($1="") | ($1=(32*"0")) | ($1=(16*"20"))
> 
> It would be nice if 4D publish how it maps special cases (like undefined
> and 0.)


Hard to guess how an empty uuid is represented, 4D made a strange soup with it. 
For my own, I prefer set empty uuid to "0"*32 myself, given that
a/ uuid is a number, represented as an alphanumeric string (hexadecimal) but it 
remains a number
b/ empty numbers in 4D have always been represented by 0

-- 
Arnaud de Montard




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