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An Elo-based rating system for Stack Overflow
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Answers and rating deltas for

Group_by - Ruby/Rails + Postgres

Author Votes Δ
Alex Avoyants 2 +2.22
Kristo Mägi 2 +2.33
Minu 2 +2.20
Andrey Deineko 0 -0.49
Sergey Burtsev 0 -2.80
Last visited: Dec 30, 2016, 1:19:15 PM