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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 table's maximum load factor.
Returns:;; Returns the table's maximum load factor.返回值：;; 返回哈希表的最大负载因子。
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```c++ float max_load_factor() const noexcept; ```
```c++ float max_load_factor() const noexcept; ```
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max_load_factor
max_load_factor
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:1403
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Returns:;; `static_cast<float>(size())/static_cast<float>(bucket_count())`, or `0` if `bucket_count() == 0`.
Returns:返回值：;; `static_cast<float>(size())/ / static_cast<float>(bucket_count())`, or `0` if ；若`bucket_count() == 0`.，则返回`0`。</float></float>
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```c++ float load_factor() const noexcept; ```
```c++ float load_factor() const noexcept; ```
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load_factor
load_factor负载因子
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Hash Policy
Hash Policy哈希策略
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:1391
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Returns:;; The size of the bucket array.
Returns:;; The size of the bucket array.返回值：;; 哈希桶数组的大小。
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```c++ size_type bucket_count() const noexcept; ```
```c++ size_type bucket_count() const noexcept; ```
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bucket_count
bucket_count
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Bucket Interface
Bucket Interface桶接口
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:1380
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Returns:;; A boolean indicating whether or not there is an element with key equal to `k` in the table. Notes:;; The `template<class K>` overload only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs. The library assumes that `Hash` is callable with both `K` and `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type. + + In the presence of concurrent insertion operations, the value returned may not accurately reflect the true state of the table right after execution.
Returns:;; A boolean indicating whether or not there is an element with key equal to `k` in the table. Notes:;; The `template<class K>` overload only participates in overload resolution if返回值：;; 布尔值，表示表中是否存在键与`k`相等的元素。
备注：;; `template<class k="">` 重载仅当 `Hash::is_transparent` and和 `Pred::is_transparent` are valid member typedefs. The library assumes that `Hash` is callable with both为合法成员类型别名时才参与重载决议。标准库假定 `Hash` 可同时接受 `K` and与 `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type. + + In the presence of concurrent insertion operations, the value returned may not accurately reflect the true state of the table right after execution.类型调用，且 `Pred` 是透明的。这实现了异构查找，避免了实例化 `Key` 类型对象的开销。
在存在并发插入操作时，返回的值可能无法准确反映执行后表的真实状态。</class>
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```c++ bool contains(const key_type& k) const; template<class K> bool contains(const K& k) const; ```
```c++ bool contains(const key_type&amp; k) const; template<class Kk=""> bool contains(const K&amp; k) const; ```</class>
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contains
contains包含
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:1364
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