It might also help noviceuser to know that this well-written answer from kcott (++) uses at its core the same method outlined in the relevant FAQ: How do I compute the difference of two arrays? How do I compute the intersection of two arrays?. The FAQs are worth a read-through from time to time; particularly so for, well, novice users.

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In reply to Re^2: compare two arrays if both are equal and have same elements irrespective of their position by hippo
in thread compare two arrays if both are equal and have same elements irrespective of their position by noviceuser

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