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...
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(); ...
erase_if(std::basic_string<...>&c, Pred pred); (2)(C++20 起) 1)从容器中擦除所有比较等于value的元素。等价于 autoit=std::remove(c.begin(), c.end(), value);autor=std::distance(it, c.end());c.erase(it, c.end());returnr; ...
{5, 'g'}, {5, 'g'}, }; println("Original:\n", data); const auto count = std::erase_if(data, [](const auto& item) { auto const& [key, value] = item; return (key & 1) == 1; }); println("Erase items with odd keys:\n", data); std::cout << count << " items...
std::deque<T, Alloc>::size_type erase_if( std::deque<T, Alloc>& c, Pred pred ); (2) (C++20 起) 1) 从容器中擦除所有比较等于 value 的元素。等价于 auto it = std::remove(c.begin(), c.end(), value); auto r = std::distance(it, c.end()); c.erase(it, c.end());...
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); (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 != last; ) { if (pred(*i)) { i = c.erase(i); } else { ++...
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(...
所以需要先移动对象,然后在erase_if中进行删除操作。此Pull Request 需要通过一些审核项 类型 指派人员 状态 审查 进行中 (0/1) 测试 进行中 (0/1) 此Pull Request 暂不能合并,一些审核尚未通过 评论 2 提交69 文件1 检查 万智宇 指派了 openeuler-ci-bot 参与评审 5 分钟前 展开全部操作日志 ...
erase_if(std::vector<T,Alloc>&c, Pred pred); (2)(C++20 起) 1)从容器中擦除所有比较等于value的元素。等价于 autoit=std::remove(c.begin(), c.end(), value);autor=std::distance(it, c.end());c.erase(it, c.end());returnr; ...