StackRating
An Elo-based rating system for Stack Overflow
Answers and rating deltas for
Rails3，'add_index' method doesn't work when I try to add 3 column
| Author | Votes | Δ |
|---|---|---|
| lloydpick | 3 | 0.00 |
Last visited: Sep 14, 2014, 5:07:29 AM