StackRating
An Elo-based rating system for Stack Overflow
Answers and rating deltas for
Use dplyr to take first and last row in a sequence by group
| Author | Votes | Δ |
|---|---|---|
| Mark Peterson | 2 | +0.49 |
| thc | 0 | -3.89 |
Last visited: Jun 28, 2017, 9:36:02 PM