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Requires:;; `value_type` is copy constructible
Requires:;; 要求：`value_type` is copy constructible可拷贝构造。
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If `Alloc::propagate_on_container_copy_assignment` exists and `Alloc::propagate_on_container_copy_assignment::value` is `true`, the allocator is overwritten, if not the copied elements are created using the existing allocator.
If如果 `Alloc::propagate_on_container_copy_assignment` exists and存在且 `Alloc::propagate_on_container_copy_assignment::value` is为 `true`, the allocator is overwritten, if not the copied elements are created using the existing allocator.，则分配器会被覆盖；否则，拷贝的元素将使用现有的分配器创建。
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The assignment operator. Copies the contained elements, hash function, predicate and maximum load factor but not the allocator.
The assignment operator. Copies the contained elements, hash function, predicate and maximum load factor but not the allocator.赋值运算符。拷贝所包含的元素、哈希函数、谓词和最大负载因子，但不拷贝分配器。
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```c++ unordered_map& operator=(unordered_map const& other); ```
```c++ unordered_map& operator=(unordered_map const& other); ```
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Copy Assignment
Copy Assignment复制赋值
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Assignment
Assignment赋值操作
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---
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Note:;; The destructor is applied to every element, and all memory is deallocated
Note:;; The destructor is applied to every element, and all memory is deallocated注意：析构函数会应用于每个元素，并且所有内存都会被释放。
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```c++ ~unordered_map(); ```
```c++ ~unordered_map(); ```
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Destructor
Destructor析构函数
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---
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Requires:;; `key_equal` needs to be https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[DefaultConstructible^].
Requires:;; 要求：`key_equal` needs to be需要满足 https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[DefaultConstructible^].可默认构造^]。
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Constructs an empty container with at least `n` buckets, using `hf` as the hash function, `a` as the allocator and a maximum load factor of 1.0 and inserts the elements from `il` into it.
Constructs an empty container with at least `n` buckets, using `hf` as the hash function, `a` as the allocator and a maximum load factor of 1.0 and inserts the elements from `il` into it.构造一个至少包含 n 个桶的空容器，使用 hf 作为哈希函数，a 作为分配器，最大负载因子为 1.0，并将 il 中的元素插入其中。
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```c++ unordered_map(std::initializer_list<value_type> il, size_type n, const hasher& hf, const allocator_type& a); ```
```c++ unordered_map(std::initializer_list<value_type> il, size_type n, const hasher&amp; hf, const allocator_type&amp; a); ```</value_type>
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initializer_list Constructor with Bucket Count and Hasher and Allocator
initializer_list Constructor with Bucket Count and Hasher and Allocator带桶数、哈希函数和分配器的初始化列表构造函数
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Requires:;; `hasher` and `key_equal` need to be https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[DefaultConstructible^].
Requires:;; 要求：`hasher` and和 `key_equal` need to be需要满足 https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[DefaultConstructible^].可默认构造^]。
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Constructs an empty container with at least `n` buckets, using `a` as the allocator and a maximum load factor of 1.0 and inserts the elements from `il` into it.
Constructs an empty container with at least `n` buckets, using `a` as the allocator and a maximum load factor of 1.0 and inserts the elements from `il` into it.构造一个至少包含 `n` 个桶的空容器，使用 `a` 作为分配器，最大负载因子为 `1.0`，并将 `il` 中的元素插入其中。
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```c++ unordered_map(std::initializer_list<value_type> il, size_type n, const allocator_type& a); ```
```c++ unordered_map(std::initializer_list<value_type> il, size_type n, const allocator_type&amp; a); ```</value_type>
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initializer_list Constructor with Bucket Count and Allocator
initializer_list Constructor with Bucket Count and Allocator带桶数和分配器的初始化列表构造函数
06/05/2026

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