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Deduction Guides
Deduction Guides推导指引
06/05/2026
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Throws:;; The function has no effect if an exception is thrown, unless it is thrown by the container's hash function or comparison function.
Throws:;; The function has no effect if an exception is thrown, unless it is thrown by the container's hash function or comparison function.抛出：;; 如果抛出异常（除非是由容器的哈希函数或比较函数抛出），则该函数无效。
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06/05/2026
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Invalidates iterators, and changes the order of elements. Pointers and references to elements are not invalidated.
Invalidates iterators, and changes the order of elements. Pointers and references to elements are not invalidated.使迭代器失效，并改变元素的顺序。指向元素的指针和引用不会失效。
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06/05/2026
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Similar to `rehash`, this function can be used to grow or shrink the number of buckets in the container.
Similar to `rehash`, this function can be used to grow or shrink the number of buckets in the container.与 `rehash` 类似，此函数可用于增加或减少容器中桶的数量。
06/05/2026
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Equivalent to `a.rehash(ceil(n / a.max_load_factor()))`, or `a.rehash(1)` if `n > 0` and `a.max_load_factor() == std::numeric_limits<float>::infinity()`.
Equivalent to等价于 `a.rehash(ceil(n / a.max_load_factor()))`, or `a.rehash(1)` if `n >；如果 `n &gt; 0` and且 `a.max_load_factor() == std::numeric_limits<float>::infinity()`.，则等价于 `a.rehash(1)`。</float>
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```c++ void reserve(size_type n); ```
```c++ void reserve(size_type n); ```
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reserve
reserve保留
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Throws:;; The function has no effect if an exception is thrown, unless it is thrown by the container's hash function or comparison function.
Throws:;; The function has no effect if an exception is thrown, unless it is thrown by the container's hash function or comparison function.抛出：;; 如果抛出异常（除非是由容器的哈希函数或比较函数抛出），则该函数无效。
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06/05/2026
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Invalidates iterators, and changes the order of elements. Pointers and references to elements are not invalidated.
Invalidates iterators, and changes the order of elements. Pointers and references to elements are not invalidated.使迭代器失效，并改变元素的顺序。指向元素的指针和引用不会失效。
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06/05/2026
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When `size() == 0`, `rehash(0)` will deallocate the underlying buckets array.
When当 `size() == 0`, 时，`rehash(0)` will deallocate the underlying buckets array.将释放底层桶数组的内存。
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Changes the number of buckets so that there are at least `n` buckets, and so that the load factor is less than or equal to the maximum load factor. When applicable, this will either grow or shrink the `bucket_count()` associated with the container.
Changes the number of buckets so that there are at least `n` buckets, and so that the load factor is less than or equal to the maximum load factor. When applicable, this will either grow or shrink the `bucket_count()` associated with the container.改变桶的数量，使得至少包含 `n` 个桶，并且使得负载因子小于或等于最大负载因子。在适用的情况下，这将增大或缩小与容器相关联的 `bucket_count()`。
06/05/2026
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```c++ void rehash(size_type n); ```
```c++ void rehash(size_type n); ```
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rehash
rehash重哈希
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Effects:;; Changes the container's maximum load factor, using `z` as a hint.
Effects:;; Changes the container's maximum load factor, using `z` as a hint.效果：;; 改变容器的最大负载因子，以 `z` 作为提示。
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```c++ void max_load_factor(float z); ```
```c++ void max_load_factor(float z); ```
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Set max_load_factor
Set max_load_factor设置最大负载因子
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Returns:;; Returns the current maximum load factor.
Returns:;; Returns the current maximum load factor.返回：;; 返回当前的最大负载因子。
06/05/2026

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