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Answers and rating deltas for
How do I merge 2 dataframes based on either/or comparison?
| Author | Votes | Δ |
|---|---|---|
| rafaelc | 2 | +0.79 |
| ansev | 2 | +2.05 |
| Vaishali | 2 | -1.45 |
| Quang Hoang | 1 | -1.39 |
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