You are correct in the statement that sets have distinct elements.

But the O.P did not say he was dealing with sets - he said "arrays".

Update: Um - Ignore this post, since you updated yours ...

     "A fanatic is one who redoubles his effort when he has forgotten his aim."—George Santayana

In reply to Re^5: Subtracting Lists by NetWallah
in thread Subtracting Lists by JimSki

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