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May 8, 2019 00:46
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| func dequeue() -> T? { | |
| // ... | |
| // 1. | |
| if !isEmpty() { | |
| // 2. | |
| let front = elements[bufferMaxSize - size] | |
| elements[bufferMaxSize - size] = nil | |
| size -= 1 | |
| return front | |
| } | |
| // 3. | |
| return nil | |
| } |
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