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An Elo-based rating system for Stack Overflow
                
    Answers and rating deltas for
    Null as parameter default value in scala produces type mismatch error
| Author | Votes | Δ | 
|---|---|---|
| joel | 2 | +4.03 | 
| Luis Miguel Mejía Suárez | 0 | -0.50 | 
Last visited: Jun 17, 2019, 2:59:36 PM