{ std::map<int, char> data { {1, 'a'}, {2, 'b'}, {3, 'c'}, {4, 'd'}, {5, 'e'}, {4, 'f'}, {5, 'g'}, {5, 'g'}, }; println("Original:\n", data); const auto count = std::erase_if(data, [](const auto& item) { auto const& [key, value] = item...
second << "}"; } return os << "}"; } int main() { std::map<int, char> data {{1, 'a'},{2, 'b'},{3, 'c'},{4, 'd'}, {5, 'e'},{4, 'f'},{5, 'g'},{5, 'g'}}; std::cout << "Original:\n" << data << '\n'; const auto count = std::erase_if(...
std::map<Key, T, Compare, Alloc>::size_type erase_if( std::map<Key, T, Compare, Alloc>& c,Pred pred );(C++20 起) 从c 中擦除所有满足谓词 pred 的元素。 等价于 auto old_size = c.size(); for (auto first = c.begin(), last = c.end(); first != last;) { if (pred(...
erase_if(std::unordered_map<Key,T,Hash,KeyEqual,Alloc>&c, Pred pred); (C++20 起) 从容器中擦除所有满足谓词pred的元素。等价于 autoold_size=c.size();for(autoi=c.begin(), last=c.end();i!=last;){if(pred(*i)){i=c.erase(i);}else{++i;}}returnold_size-c.size(); ...
typename std::unordered_map<Key,T,Hash,KeyEqual,Alloc>::size_type erase_if(std::unordered_map<Key,T,Hash,KeyEqual,Alloc>& c, Pred pred); (C++20 起) 从容器中擦除所有满足谓词 pred 的元素。等价于 auto old_size = c.size(); for (auto i = c.begin(), last = c.end(); i != ...
std::map<std::string, std::string>::iterator it =mapTest.begin();while(it !=mapTest.end()) {if(TestVal(it->second)) { it=mapTest.erase(it); }elseit++; } 正确用法二: 使用删除之前的迭代器定位下一个元素。STL建议的使用方式 ...
std::erase_if (std::multimap)C++ Containers library std::multimap Defined in header <map> template< class Key, class T, class Compare, class Alloc,class Pred > std::multimap<Key, T, Compare, Alloc>::size_type erase_if( std::multimap<Key, T, Compare, Alloc>& c,...
std::map<std::string, std::string >::iterator it = mapTest.begin(); while(it != mapTest.end()) { if(TestVal(it->second)) { it = mapTest.erase(it); } else it++; } ... 在这种方式中,通过std::map的erase方法在释放了it后会返回指向下一个元素的指针来获取最新的iterator 方法二...
voiderase_if(std::map<Key,T,Compare,Alloc>&c, Pred pred); (library fundamentals TS v2) Erases all elements that satisfy the predicatepredfrom the container. Equivalent to for(autoi=c.begin(), last=c.end();i!=last;){if(pred(*i)){i=c.erase(i);}else{++i;}} ...
map<vector<char>, vector<string>>::iterator myIter = mMyMap.find(vChars); if(myIter != mMyMap.end()) { vector<string> vStrings = myIter->second; mMyMap.erase(myIter); vStrings.push_back(some_other_string); mMyMap.insert(pair<vector<char>, vector<string>>(vChars, vStrings));...