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Controlling the Number of Buckets
Controlling the Number of Buckets桶数量控制
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`const_local_iterator cend(size_type n) const`
`const_local_iterator cend(size_type n) const`
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`const_local_iterator cbegin(size_type n) const`
`const_local_iterator cbegin(size_type n) const`
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`const_local_iterator end(size_type n) const`
`const_local_iterator end(size_type n) const`
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`const_local_iterator begin(size_type n) const`
`const_local_iterator begin(size_type n) const`
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`local_iterator end(size_type n)`
`local_iterator end(size_type n)`
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1.6+|Return begin and end iterators for bucket `n`.
1.6+|Return begin and end iterators for bucket `n`.返回编号为 `n` 的桶的起始与末尾迭代器。
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`local_iterator begin(size_type n)`
`local_iterator begin(size_type n)`
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Returns the index of the bucket which would contain `k`.
Returns the index of the bucket which would contain `k`.返回键 `k` 所对应的桶的索引。
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`size_type bucket(key_type const& k) const`
`size_type bucket(key_type const& k) const`
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The number of elements in bucket `n`.
The number of elements in bucket `n`.返回桶 `n` 中的元素数量。
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`size_type bucket_size(size_type n) const`
`size_type bucket_size(size_type n) const`
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An upper bound on the number of buckets.
An upper bound on the number of buckets.桶数量的上限。
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`size_type max_bucket_count() const`
`size_type max_bucket_count() const`
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2+^h| *Closed-addressing containers only* h|*Method* h|*Description*
2+^h| *Closed-addressing containers only* h|*Method* h|*Description仅限闭寻址容器* h|*方法* h|*描述*
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The number of buckets.
The number of buckets.桶的数量。
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`size_type bucket_count() const`
`size_type bucket_count() const`
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2+^h| *All containers* h|*Method* h|*Description*
2+^h| *All containers* h|*Method* h|*Description所有容器* h|*方法* h|*描述*
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In open-addressing containers, buckets can hold at most one element; if a collision happens (like is the case of `D` in the example), the element uses some other available bucket in the vicinity of the original position. Given this simpler scenario, Boost.Unordered open-addressing containers offer a very limited API for accessing buckets.
In open-addressing containers, buckets can hold at most one element; if a collision happens (like is the case of `D` in the example), the element uses some other available bucket in the vicinity of the original position. Given this simpler scenario, Boost.Unordered open-addressing containers offer a very limited API for accessing buckets.在开放寻址式容器中，每个桶最多只能容纳一个元素；若发生冲突（如示例中的元素 `D` 的情况），该元素将使用原始位置附近的其他可用桶。基于此简化设计，Boost.Unordered开放寻址容器仅提供极其有限的桶访问API。
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image::buckets-oa.png[]
image::buckets-oa.png[]
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