classV,classHash=HashFunc<K>>classunordered_map{structmapKeyOfValue{constK&operator()(conststd::pair<K,V>&kv){returnkv.first;}};//这就是keyofT的实现!private:HashBucket<K,std::pair<constK,V>,Hash,mapKeyOfValue>_hash
如果不放心可以使用C++0x的std::unique_ptr<>来申请内存 如果真的用new的话最好用std::vector<>,std::list<>,std::deque<>,std::map<>,std::unordered_map<>等容器，效率并且方便而且不用delete,可以去查查c++primer4中英混合版的chm。
(未acc,只满足对D组数据的分配) #include<iostream>#include<queue>#include<algorithm>#include<unordered_map>usingnamespacestd;structpoint {intx;inty; }a[2];intmain() { ios::sync_with_stdio(false); unordered_map<int,int>v1; unordered_map<int,int>h1; priority_queue<pair<int,int>>v; pri...
Similar problems exist withunordered_map. One solution is to usestd::piecewise_construct, (which we learned aboutsome time ago), so that you can specify constructor parameters for each of the halves of thestd::pair: table.emplace(std::piecewise_construct, std::forward_as_tuple(1), std::fo...
unordered_mapstd:: A customer had some code that used astd::map, and they found that when they switched tostd::unordered_mapit began to crash a lot more than it did before. Eventually, they traced the problem back to unsafe multithreaded access to the collection, but they wondered why the...
unordered containers: unordered set/multiset, unordered map/multimap 6. 容器 array 没有Ctor、Dtor 7. 容器 Hashtable8. Hash function void* pi = (void*)(new int(100)); cout << hash<int>{}(123) << endl; cout << hash<long>()(123L) << endl; cout << hash<string>()(string("Ace...
mutablestd::unordered_map<string,constOpRegistrationData*>registry_; 还得先说一下OpDefBuilder这个类,OpDefBuilder会负责接收Op的各种属性和参数定义(就是REGISTER_OP时指定的,见下),最后统一解析(注意只是解析并不保证合法性之类的)并转给OpRegistrationData这个类(包括ShapeFn)。
std::unordered_map<int, std::vector<std::vector<user_variant>>> dict; std::vector<flame::dataframe < user_variant> * > type_dataframe; int max_length_name = 0; int pos_1 = 0; pos_1 = rx_1.indexIn(codeContent, pos_1); ...
unordered_set 哈希表 插入、删除、查找 O(1) 最差 O(n) 无序 不可重复 unordered_multiset 哈希表 插入、删除、查找 O(1) 最差 O(n) 无序 可重复 unordered_map 哈希表 插入、删除、查找 O(1) 最差 O(n) 无序 不可重复 unordered_multimap 哈希表 插入、删除、查找 O(1) 最差 O(n) 无...
static std::unordered_map<std::string, std::string> m{{"X", /*->*/ "Out"}}; return m; } }; template <typename T> class ExponentialKernel<platform::CPUDeviceContext, T> : public framework::OpKernel<T> { public: void Compute(const framework::ExecutionContext &ctx) const override {...