std::stringconvert_talk_topic( talk_topic_enumconstold_value ){staticconststd::unordered_map<talk_topic_enum,std::string> talk_topic_enum_mapping = { {// This macro creates the appropriate new names (as string) for each enum value, so one does not// have to repeat so much (e.g. '...
unordered_map::at():C++中的此函数unordered_map以该元素为键k返回对该值的引用。句法: unordered_map.at(k);参数:It is the key value of the element whose mapped value we want to access.返回类型:A reference to the mapped value of the element with a key value equivalent 注意:如果不存在 key...
std::unordered_map<std::string,std::string>first={{"Star Wars","G. Lucas"},{"Alien","R. Scott"},{"Terminator","J. Cameron"}},second={{"Inception","C. Nolan"},{"Donnie Darko","R. Kelly"}};first.swap(second);std::cout<<"first: ";for(auto&x:first)std::cout<<x.first<<...
unordered_map<char,int>mp={{'H',21},{'I',52},{'J',36},{'K',47},{'L',54}}; Define an Iterator itr autoitr=mp.find('L'); print the values based on the requirement Examples of C++ unordered_map To understand more about the unordered map, let us work with some sample progra...
// erase examples: mymap.erase ( mymap.begin() ); // erasing by iterator mymap.erase ("France"); // erasing by key mymap.erase ( mymap.find("China"), mymap.end() ); // erasing by range clear Clear content (public member function ) ...
C++ unordered_map find() Function: Here, we will learn about the find() function, its usages, syntax and examples. Submitted byShivang Yadav, on July 20, 2022 Anunordered_mapis a special type of container that stores data in the form of key-value pairs in an unordered manner. The key...
C++ unordered_map empty() Function: Here, we will learn about the empty() function, its usages, syntax and examples. Submitted byShivang Yadav, on July 20, 2022 Anunordered_mapis a special type of container that stores data in the form of key-value pairs in an unordered manner. The key...
1 std::unordered_map<IVector3, float, IVector3Hash> g_score;但是,当我尝试在此映射中放置一个值时,出现警告,我需要查看对函数模板实例化的引用: 123456789101112g_score.emplace(from_node->index, 0);1>c:\users\accou\documents\pathfindingexamples\c++ library\pathfindinglib\pathfindinglib\pathfinding....
#include <unordered_map>#include <string>int main(){// 哈希表默认初始化// 函数原型:unordered_map();// 创建一个空的 unordered_map 容器std::unordered_map<std::string, int> umap1;// 使用列表初始化// 函数原型:unordered_map(initializer_list<value_type>);// 使用初始化列表创建 unordered_map...
如果想在unordered_map里面使用tuple as key,需要自行指定hash函数。 如下: https://blog.csdn.net/pineappleKID/article/details/108341064 参考: How to create an unordered_map of tuples in C++? - GeeksforGeeks Map of Tuples in C++ with Examples - GeeksforGeeks...