std::map<Key,T,Compare,Allocator>::insert_or_assign template<classM> std::pair<iterator,bool>insert_or_assign(constKey&k, M&&obj); (1)(since C++17) template<classM> std::pair<iterator,bool>insert_or_assign(Key&&k, M&&obj);
myMap.insert({key, value}); 使用下标运算符 []: cpp myMap[key] = value; 使用emplace 方法(C++11 引入): cpp myMap.emplace(key, value); 使用try_emplace 方法(C++17 引入): cpp auto result = myMap.try_emplace(key, value); 使用insert_or_assign 方法(C++17 引入): cpp auto result...
std::unordered_map::insert std::unordered_map::insert_or_assign std::unordered_map::key_eq std::unordered_map::load_factor std::unordered_map::max_bucket_count std::unordered_map::max_load_factor std::unordered_map::max_size std::unordered_map::merge std::unordered_map::operator[] std...
insert_range (C++23) 插入元素范围 (公开成员函数) insert_or_assign (C++17) 插入元素,或若键已存在则赋值给当前元素 (公开成员函数) emplace (C++11) 原位构造元素 (公开成员函数) emplace_hint (C++11) 使用提示原位构造元素 (公开成员函数)
std::map::insert std::map::insert_or_assign std::map::key_comp std::map::lower_bound std::map::map std::map::max_size std::map::merge std::map::operator[] std::map::rbegin std::map::rend std::map::size std::map::swap std::map::try_emplace std::map::upper_bound std:...
1. m.insert(std::pair<string,int>(“a”,1)); 2. m.insert(std::map<string,int>::value_type(“a”,1)); 3. m[“a”] = 1; 4. insert_or_assign (c++17) #include <iostream> #include <map> #include <string> int main() ...
std::unordered_map::insert_or_assign std::unordered_map::key_eq std::unordered_map::load_factor std::unordered_map::max_bucket_count std::unordered_map::max_load_factor std::unordered_map::max_size std::unordered_map::merge std::unordered_map::operator[] std::unordered_map::rehash std...
std::map<Key,T,Compare,Allocator>::insert_or_assign std::map<Key,T,Compare,Allocator>::clear std::map<Key,T,Compare,Allocator>::map std::map<Key,T,Compare,Allocator>::~map std::map<Key,T,Compare,Allocator>::operator= std::map<Key,T,Compare,Allocator>::rbegin, std::map<Key,T,Co...
insert_or_assign (C++17) inserts an element or assigns to the current element if the key already exists (public member function) inserter creates a std::insert_iterator of type inferred from the argument (function template) Retrieved from "https://en.cppreference.com/mwiki/index.php?
insert_range (C++23) inserts a range of elements (public member function) insert_or_assign (C++17) inserts an element or assigns to the current element if the key already exists (public member function) emplace (C++11) constructs element in-place ...