From: Unc88 Unc88 <unc88@...>
Date: 2010-08-21T23:17:15+09:00
Subject: A small problem for arrays

I have 2 array. ar_1, ar_2
How can we, on the basis of existing arrays to create an array ar_3, of
all the elements that are ar_1 and are not included in ar_2.
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