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316 :1374

	English ```c++ template<class M> bool insert_or_assign(const key_type& k, M&& obj); template<class M> bool insert_or_assign(key_type&& k, M&& obj); template<class K, class M> bool insert_or_assign(K&& k, M&& obj); ``` 209/10000 · 209
317 :1380

	English Inserts a new element into the table or updates an existing one by assigning to the contained value. 100/10000 · 100
318 :1382

	English If there is an element with key `k`, then it is updated by assigning `std::forward<M>(obj)`. 92/10000 · 92
319 :1384

	English If there is no such element, it is added to the table as: ```c++ 64/10000 · 64
320 :1387

	English value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<Key>(k)), std::forward_as_tuple(std::forward<M>(obj))) 126/10000 · 126
321 :1392

	English value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<K>(k)), std::forward_as_tuple(std::forward<M>(obj))) ``` 128/10000 · 128
322 :1398

	English Returns:;; `true` if an insert took place. Concurrency:;; Blocking on rehashing of `*this`. Notes:;; Invalidates pointers and references to elements if a rehashing is issued. + + The `template<class K, class M>` 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. 536/10000 · 536
:1404 :1404

	English --- 3/10000 · 3
324 :1406

	English erase 5/10000 · 5
325 :1407

	English ```c++ size_type erase(const key_type& k); template<class K> size_type erase(const K& k); ``` 93/10000 · 93
326 :1412

	English Erases the element with key equivalent to `k` if it exists. 59/10000 · 59
327 :1415

	English Returns:;; The number of elements erased (0 or 1). Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal`. 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. 496/10000 · 496
:1419 :1419

	English --- 3/10000 · 3
329 :1421

	English erase_if by Key 15/10000 · 15
330 :1422

	English ```c++ template<class F> size_type erase_if(const key_type& k, F f); template<class K, class F> size_type erase_if(const K& k, F f); ``` 136/10000 · 136
331 :1427

	English Erases the element `x` with key equivalent to `k` if it exists and `f(x)` is `true`. 84/10000 · 84
332 :1430

	English Returns:;; The number of elements erased (0 or 1). Throws:;; Only throws an exception if it is thrown by `hasher`, `key_equal` or `f`. Notes:;; `f` is passed a non-const reference to `x`. + + The `template<class K, class F>` overload only participates in overload resolution if `std::is_execution_policy_v<std::remove_cvref_t<ExecutionPolicy>>` is `false`. + + The `template<class K, class F>` 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. 727/10000 · 727
:1438 :1438

	English --- 3/10000 · 3
:1440 :1440

	English erase_if 8/10000 · 8
335 :1441

	English ```c++ template<class F> size_type erase_if(F f); ``` 53/10000 · 53

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