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Another shameless plug? possibly... but apropos.
Great suggestions thus far, so in the spirit of TIMTOWTDI I would suggest having a look at The Uniqueness of hashes. It's a collection of some techniques for just this sort of operation. -InjunJoel
"I do not feel obliged to believe that the same God who endowed us with sense, reason and intellect has intended us to forego their use." -Galileo
In reply to Re: What is the best way to get just the duplicates from an array?
by injunjoel
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