当有序Map为空时,调用entrySet().iterator().next()方法可能会抛出NoSuchElementException异常。因此,在获取第一个键值对之前,最好先检查Map是否为空。 在LinkedHashMap中,插入和删除操作的性能较好,但查找操作的性能较差。而在TreeMap中,插入、删除和查找操作的性能都较好,但相对于LinkedHashMap,性能稍差。 总结 ...
#include <iostream> #include <string> #include <unordered_map> int main() { // 创建hash对象 std::unordered_map<int, std::string> hashTable; // 添加元素 hashTable[0] = "False"; hashTable[1] = "True"; // 迭代并打印 for (const auto& node : hashTable) { std::cout << "Key =...
getipv4sourcefilter() — Get source filter getitimer() — Get value of an interval timer getlogin() — Get the user login name getlogin_r() — Get login name __getlogin1() — Get the user login name getmccoll() — Get next collating element from string getmsg(), getpmsg...
However, it is possible to sort vectors in-place in a buffer, and for this to work, the vector must be cast to mutable first. A vector (or string) type points to the element with index 0 in the buffer, just after the length field, and it may be cast to a native type for ...
You can change the map view in CarPlay. carriage return SeeCR. carrier Use this, orwireless carrier, to refer to a mobile network operator that provides wireless communication services (including network, voice, and data). catalog Refers to a list of all files and folders stored on a volume...
本文档是针对嵌入式开发而写。这里不会讨论任何非嵌入式的 Rust 特性:见 https://rust-embedded.github.io/book/intro/no-std.html 。 Cpp 用户请注意。Rust 和 Cpp 共享很多术语与概念(所有权、生命周期、析构器、多态性),但 Rust 对它们的实现往往具有明显不同的语义。在 Cpp 中的经验不应该被期望能准确...
map方法接受一个函数作为参数,这个函数可以是你自己定义的,也可以是paddlenlp库中提供的一些数据处理函数 dataset = dataset. map (trans_fn) """ distributedbatchsampler是一个分布式批次采样器,用于在分布式训练中对数据进行切分和采样,使得每个进程可以加载原始数据的一个子集,避免数据重复或冲突 batchsampler是一个...
HBITMAP to CBitmap hbrBackground = (HBRUSH)(COLOR_WINDOW+1), what is +1 for??? heap corruption detected Help required to convert a .dll file in to the source code Help with "Failed to return new code element. Possible syntax error" help with error C2872: 'IServiceProvider' : ambig...
'texturemap' Transform the color data in CData so that it conforms to the surface. 'none' Do not draw the faces. RGB triplets and hexadecimal color codes are useful for specifying custom colors. An RGB triplet is a three-element row vector whose elements specify the intensities of the red...
set 红黑树 有序 不可重复 multiset 红黑树 有序 可重复 map 红黑树 有序 不可重复 multimap 红黑树 有序 可重复 hash_set hash表 无序 不可重复 hash_multiset hash表 无序 可重复 hash_map hash表 无序 不可重复 hash_multimap hash表 无序 可重复 数据...