>
> Can you explain exactly what the your rules are? You seem to be saying
> that ["alfa", "10"] and ["alfa", "10"] belong in 'overlap' because they
> are identical, which is fair enough. But by what criterion do
> ["gamma", "12"] and ["gamma"] belong in the same list? Would ["alfa"]
> belong there too? And ["alfa", "12"]? And ["gamma", "10"]?
>
> Rob
>

Sorry again, I'm really bad to describe the questions.
I'll try again:

 @G1 = (["alfa" ,  "10"], ["beta" ,  "11"]);
 @L1 = (["alfa" ,   "10"], ["gamma" ,  "12"]);
 @G2 =('gamma');


ok let's che before the first 2 array:

alfa,10 they are identical and so are in overlap group, fine;

so remain beta,11 and gamma,12 ok?

Now let's check these results on @G2:

beta,11 is unique and belongs to @unique correctly,
gamma,12 have to be excluded couse the couple of value contain gamma.

Is like when u do a select of a row (gamma,12) that is not in other row
which contains just one of the value (specifically col1 = gamma in the
example).

I hope i was clear enough.
tnx again for the patient u all have

Vito

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