StackRating
An Elo-based rating system for Stack Overflow
                
    Answers and rating deltas for
    Why does the following simple method return NaN (not a number) in Javascript?
| Author | Votes | Δ | 
|---|---|---|
| Jan Stránský | 3 | +3.86 | 
| Victor Molina | 2 | +2.38 | 
| Raphael | 1 | -1.00 | 
| Juan Luces | 1 | -0.92 | 
| Siddhant Jain | 0 | -4.00 | 
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