unordered_map::get_allocator Iterators unordered_map::beginunordered_map::cbegin unordered_map::endunordered_map::cend Capacity unordered_map::size unordered_map::max_size unordered_map::empty Modifiers unordered_map::clear unordered_map::erase ...
erase_if(std::unordered_map<Key, T, Hash, KeyEqual, Alloc>&c, Pred pred); (since C++20) Erases all elements that satisfy the predicatepredfromc. Equivalent to autoold_size=c.size();for(autofirst=c.begin(), last=c.end();first!=last;){if(pred(*first))first=c.erase(first);else...
#include<iostream>#include<unordered_map>#include<vector>#include<string>#include<any>#include<algorithm>#include<typeinfo>classDict{private:std::unordered_map<std::string,std::any>data;public:template<typenameKeyType,typenameValueType>voidinsert(constKeyType&key,constValueType&value){data[key]=value...
如何在Dev-Cpp中使用C++11中的函数:stoi、to_string、unordered_map、unordered_set、auto,程序员大本营,技术文章内容聚合第一站。
unordered_multimap<K, T, H, P, A>::size_type erase_if( unordered_multimap<K, T, H, P, A>& c, Predicate pred); namespace pmr { template<class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>> using unordered_map = std::unordered_map<Key, T, Hash, Pred...
比如,把unordered_map中为0的元素都删除掉unordered_map<int, int> map = { {1, 2}, {2, 3}, {3, 0}, {4, 1}, {5, 0}, {6, 0} }; auto it = map.begin(); while (it != map.end()) { if (it->second == 0) { it = map.erase(it); } else { it++; } } for (...
#include<iostream>#include<list>#include<deque>#include<unordered_map>usingnamespacestd;classLRUCache{public:intmaxsize;list<pair<int,int>>d;unordered_map<int,list<pair<int,int>>::iterator>m;LRUCache(intcapacity){maxsize=capacity;}intget(intkey){// get到的时候修改排列顺序if(m.count(key)...
无序容器 (Unorderde Containers) 包括:unordered_set/unordered_multiset,unordered_map/unordered_multimap. 底层实现:哈希表。在标准库实现里,每个元素的散列值是将值对一个质数取模得到的, 特点: 内部元素无序 在最坏情况下,对无序关联式容器进行插入、删除、查找等操作的时间复杂度会与容器大小成线性关系。这一...
unordered_map<ros::Time, KeyFrame::Ptr, RosTimeHash> keyframe_hash; std::unique_ptr<GraphSLAM> graph_slam; std::unique_ptr<LoopDetector> loop_detector; std::unique_ptr<KeyframeUpdater> keyframe_updater; std::unique_ptr<NmeaSentenceParser> nmea_parser; std::unique_ptr<InformationMatrix...
std::unordered_multimap 在标头<unordered_map>定义 template< classKey, classT, classHash=std::hash<Key>, classKeyEqual=std::equal_to<Key>, classAllocator=std::allocator<std::pair<constKey, T>> >classunordered_multimap; (1)(C++11 起) ...