##### 以下是关于 unordered-map 的编程技术问答
std::unordered_map ＜ K, boost::ptr_deque ＜ T ＞'s operator[] (K const &)和emplace之间的区别
#include #include #include #include #include struct T { T() = default; T(T const &) = delete; T & operator = (T const &) = delete; T(T &&) = default; T & operator = (T &&) = default; }; using S = boost::ptr_deque ; int main() { std::unordered_map testum; // testum.emplace(1u, S()); // testum.insert(std::make_pa
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Boost多索引容器与基于std::unordered_map（map的映射）的多级映射容器的比较

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Boost.Intrusive和unordered_map

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C++分拣算法

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typedef boost::unordered_map OneDimentionalNodes; typedef boost::unordered_map TwoDimentionalNodes; TwoDimentionalNodes nodes; 这是有效的吗? 我不使用任何哈希功能，因为unordered_maps的键是单个整数. 它编译了，但是当我这样迭代它时，它在尝试访问此 - > hash_function()(k); 时会崩溃 for (TwoDimentionalNodes::iterator it= nodes.begin(); it != nodes.end() ; ++it) { for(OneDimentionalNodes::iterator it2 = nodes[it->first].begin(); it2 != nodes[it->first].end()
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