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Answers and rating deltas for

What is the most efficient way to test for duplicates in a user inputted array?

Author Votes Δ
JeJo 3 +0.96
463035818_is_not_a_number 1 -0.79
Surak of Vulcan 1 -1.36
Last visited: Sep 4, 2019, 3:46:46 PM