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An Elo-based rating system for Stack Overflow

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Answers and rating deltas for

dplyr summarize grouped data with another column

Author	Votes	Δ
neilfws	1	+0.47
Rolando Tamayo	0	-1.87
Rolando Tamayo	0	-1.87

Last visited: Jan 22, 2018, 5:56:14 AM