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XCEngine/docs/api/containers/array/popback.md

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# Array::PopBack()
```cpp
void PopBack();
```
移除数组末尾的元素,并调用其析构函数。
**前置条件:** 数组必须非空(`Size() > 0`)。如果数组为空,行为未定义。
**行为:**
-`Size()` 减 1
- 调用被移除元素的析构函数
- **不释放底层内存**
**线程安全:** ❌ 操作期间不可并发访问
**示例:**
```cpp
XCEngine::Containers::Array<int> arr = {10, 20, 30, 40, 50};
arr.Size(); // 5
arr.PopBack(); // 移除 50
arr.Size(); // 4
// arr = {10, 20, 30, 40}
arr.PopBack();
arr.PopBack();
// arr = {10, 20}
// Capacity() 仍为之前的值(如 8
```
## 相关文档
- [Array 总览](array.md) - 返回类总览