StackRating
An Elo-based rating system for Stack Overflow
                
    Answers and rating deltas for
    Is there a way to use the map function in pandas to merge similar rows into their own column?
| Author | Votes | Δ | 
|---|---|---|
| Michael Gardner | 1 | +4.22 | 
| Dani Mesejo | 0 | -0.55 | 
| Kenan | 0 | -0.69 | 
| moys | 0 | +0.11 | 
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