#include <iostream>#include <unordered_map>intmain(){std::unordered_map<int,char>example{{1,'a'},{2,'b'}};for(intx:{2,5})if(example.contains(x))std::cout<<x<<": 找到\n";elsestd::cout<<x<<": 未找到\n";} 输出:
unordered_map::operator[] unordered_map::count unordered_map::find unordered_map::contains (C++20) unordered_map::equal_range Bucket interface unordered_map::begin(size_type)unordered_map::cbegin(size_type) unordered_map::end(size_type)unordered_map::cend(size_type) ...
unordered_map::count unordered_map::find unordered_map::contains (C++20) unordered_map::equal_range Bucket interface unordered_map::begin(size_type)unordered_map::cbegin(size_type) unordered_map::end(size_type)unordered_map::cend(size_type) ...
class Solution { public: bool containsNearbyDuplicate(vector<int>& nums, int k) { unordered_map<int,int> mymap; for (int i=0; i < nums.size(); ++i){ auto it = mymap.find(nums[i]); if (mymap.count(nums[i]) && abs(it->second - i) <=k ) return true; mymap[nums[i]...
就实现这样一个,哈哈,其实也比较简单,水文罢了,我们封装一下unordered_map private: std::unordered_map<std::string, std::any> data; 这样我们的value就能存入任何值 接下来实现插入方法,模板函数 template<typename KeyType, typename ValueType> void insert(const KeyType& key, const ValueType& value) {...
m.contains(key),注意只能在 c++20 或以上版本使用 int main(void) { // 初始化 unordered_map<string, int> strCnt = { { "hello", 2 }, { "world", 3 } }; // 遍历 for (auto& p : strCnt) { std::cout << p.first << p.second << std::endl; } // 增加一个 new <key, val...
unordered_multimap 创建账户 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;...
#include<unordered_map> classWindowHook { Expand All@@ -18,28 +17,27 @@ class WindowHook returninstance; } voidstop(); voidsetTargetWidget(QWidget* parentWidget); ~WindowHook(); voidsetCallback(std::function<void()> callback);
Ordered Associative Note: provides sorting which is less efficient than non-sorted containers. std::set std::map std::multiset std::multimapUnordered Associative (without sorting) std::unordered_set std::unordered_map std::unordered_multiset std::unordered_multimapContainer Adaptors ...
typedef std::unordered_map<std::string, int, std::function<size_t (const std::string &key)>> std_hashmap; typedef phmap::flat_hash_map<std::string, int, std::function<size_t (const std::string &key)>> fast_hashmap; //--- // We view our timing values as a series of...