{ 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...
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(...
std::erase_if (std::unordered_map)定义于头文件 <unordered_map> template< class Key, class T, class Hash, class KeyEqual, class Alloc, class Pred > typename std::unordered_map<Key,T,Hash,KeyEqual,Alloc>::size_type erase_if(std::unordered_map<Key,T,Hash,KeyEqual,Alloc>& c, Pred...
std::cerr << "can't find the documents." << std::endl; return; } std::unordered_map<string, string> trans_map; for (string key, value; ifs_map >> key && getline(ifs_map, value); ) if (value.size() > 1) trans_map[key] =value.substr(1).substr(0, value.find_last_not_o...
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 != ...
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(...
erase_if(std::unordered_map<Key, T, Hash, KeyEqual, Alloc>&c, Pred pred); (since C++20) Erases all elements that satisfy the predicatepredfromc. Equivalent to autoold_size=c.size();for(autofirst=c.begin(), last=c.end();first!=last;){if(pred(*first))first=c.erase(first);else...
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;}} ...
Defined in header<unordered_map> template<classKey,classT,classHash,classKeyEqual,classAlloc, classPred> std::unordered_multimap<Key, T, Hash, KeyEqual, Alloc>::size_type erase_if(std::unordered_multimap<Key, T, Hash, KeyEqual, Alloc>&c, ...
Defined in header<flat_map> template<classKey,classT,classCompare,classKeyContainer,classMappedContainer, classPred> std::flat_multimap<Key, T, Compare, KeyContainer, MappedContainer>::size_type erase_if(std::flat_multimap<Key, T, Compare, KeyContainer, MappedContainer>&c, ...