Note: I know this is Seekers of Perl Wisdom, but there were already plenty of good Perl solutions, and I couldn't resist.

If you're on a unix (should I say GNU?) machine, or have cygwin installed on a Windows machine, you can very easily accomplish these tasks with sort and uniq.

Print unique lines:

sort -u numberlist

Print all duplicates:

sort numberlist | uniq -D

(Or if you know the numberlist is already sorted, uniq -D numberlist will do.)

In reply to Re: Separate duplicate and unique records by revdiablo
in thread Separate duplicate and unique records by wsee

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