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Answers and rating deltas for

How do I remove duplicate characters and keep the unique one only in Perl?

Author Votes Δ
codaddict 12 +0.68
Giant Hare 4 +3.12
ghostdog74 3 +0.21
Hynek -Pichi- Vychodil 3 +0.20
mscha 1 -0.48
Giant Hare 1 -0.48
Deep-B 1 -0.47
Alexandr Ciornii 1 -0.45
jkyle 0 -3.26
Jean Jordaan 0 -3.28
Mike 0 -3.06
Last visited: Sep 14, 2014, 5:07:29 AM