What is different between this post and Array Difference for Two Dimentional Array! or Difference Between Two array or File Manipulation - Need Advise!? It's the same question, 3 more times. One of them is almost word for word. In fact, in that last post I've mentioned, the problem is practically solved for you.

In reply to Re: remove duplicates from an array! by assemble
in thread remove duplicates from an array! by nashkab

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