StackRating
An Elo-based rating system for Stack Overflow
Answers and rating deltas for
Ruby on rails : undefined method `map' for nil:NilClass , what causes this? when i add record to
| Author | Votes | Δ |
|---|---|---|
| Prezes Łukasz | 1 | +4.02 |
| slowjack2k | 0 | -4.02 |
Last visited: Nov 20, 2016, 1:02:42 PM