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An Elo-based rating system for Stack Overflow
                
    Answers and rating deltas for
    Swift - A function is only returning nil after appending key values from a dict?
| Author | Votes | Δ | 
|---|---|---|
| mnemonic23 | 0 | +0.06 | 
| PPL | 0 | +0.32 | 
| Milan NosáΔΎ | 0 | -0.21 | 
| Nitish | 0 | +0.17 | 
Last visited: Jun 5, 2018, 4:10:50 PM