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Answers and rating deltas for
How is the ? operator different than including undefined in the type?
| Author | Votes | Δ |
|---|---|---|
| Paul Huynh | 4 | +3.90 |
| Eric LeBlanc | 2 | +1.17 |
| Gabriel Tiso | 1 | -1.39 |
| Adrian Brand | -1 | -0.46 |
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