C++ map与unordered_map 1.区别map:本质红黑树,插入新数据后自动排序,存放的数据是有序的unordered_map:本质哈希表,数据无序,根据插入数据的顺序排列,查找速度快。使用上,map与unordered_map的函数都一样,如果不需要排序,使用unordered_map即可。2.头文件map:#include<map>unordered_ma
从测试结果可以看出,写操作耗时:std::unordered_map < absl::flat_hash_map < absl::node_hash_map,absl::flat_hash_map比std::unordered_map耗时平均增加9%;读操作耗时:absl::flat_hash_map < absl::node_hash_map < std::unordered_map,absl::flat_hash_map比std::unordered_map耗时平均降低20%。 总...
30、vector迭代器失效的情况 31、map与unordered_map对比 32、set与unordered_set对比 33、STL容器空间配...
"map": "cpp", "set": "cpp", "string": "cpp", "unordered_map": "cpp", "unordered_set": "cpp", "vector": "cpp", "exception": "cpp", "algorithm": "cpp", "functional": "cpp", "iterator": "cpp", "memory": "cpp", "memory_resource": "cpp", "numeric": "cpp", "option...
stream()获取当前小物件的source,filter和mapToInt为intermediate操作,进行数据筛选和转换,最后一个sum操作为terminal操作,对符合条件的小物件作重量求和 流的操作 Intermediate: map(mapToint、flatMap)、filter、distinct、sort、peek、limit、skip、parallel、sequential、unordered ...
AtomicList，AtomicUnorderedMap，AtomicStruct都是一个在高并发的情况下需要用到的数据结构如果你对里面的...
let tombstoneIds = resultTombstones.map { $0.id } Then we create an unordered set of the non-tombstone containers. In doing this, we filter out any containers that are in the new tombstone array created above. 1 2 3 4 var encounteredIds: Set<ValueContainer.ID> = [] let unorderedValue...
CD3D11_UNORDERED_ACCESS_VIEW_DESC class (Windows) CF_FILE_RANGE_BUFFER structure (Windows) RemoveDirectoryFromApp function (Windows) MDM_Policy_Config01_AppRuntime02 class (Windows) MDM_Policy_Config01_SystemServices02 class (Windows) DCompositionGetFrameStatistics function (Windows) InkDesktopHost...
hashmap性能对比测试数据类型主要分为 Numbers 和 String 类型。...gtl::flat_hash_map 版本实现在 Find 1 – 500k uint64_t 这个测试集表现最好emhash8::HashMap 和 emhash7::HashMap 是仅次于ankerl...Ankerl::unordered_dense::map和emhash8::HashMap 是如何实现的。...Hashmap主要结构包括一个 ...
sqlitemap - Persistent map backed by SQLite. [MIT] st_tree - A fast and flexible c++ template class for tree data structures. [Apache-2.0] svector - Compact SVO optimized vector for C++17 or higher. [MIT] tree.hh - An STL-like C++ header-only tree library. [GPL2+] unordered_dense...