{5, 'g'}, {5, 'g'}, }; println("Original:\n", data); const auto count = std::erase_if(data, [](const auto& item) { const auto& [key, value] = item; return (key & 1) == 1; }); println("Erase items with odd keys:\
typename std::deque<T, Alloc>::size_type erase_if( std::deque<T, Alloc>& c, Pred pred ); (2) (C++20 起) (C++26 起为 constexpr) 1) 从容器 c 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 = c.end() - it;c.erase...
std::multiset<Key, Compare, Alloc>::size_type erase_if( std::multiset<Key, Compare, Alloc>& c,Pred pred );(since C++20) Erases all elements that satisfy the predicate pred from c. Equivalent to auto old_size = c.size(); for (auto first = c.begin(), last = c.end(); first...
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(...
通过源码查看,可以发现front()其实是引用类型,而std::erase本身又调用了std::__remove_if,这也不难让人想出解决问题的办法,也就是做一份拷贝。 voidmy_erase(auto&x){autotmp=x.front();std::erase(x,tmp);} 但是既然都来写Cpp了,我们还可以追求点“洁癖”,我们很多时候并不希望有多余...
通过源码查看,可以发现front()其实是引用类型,而std::erase本身又调用了std::__remove_if,这也不难让人想出解决问题的办法,也就是做一份拷贝。 voidmy_erase(auto&x){ autotmp=x.front(); std::erase(x,tmp); } 但是既然都来写Cpp了,我们还可以追求点“洁癖”,我们很多时候并不希望有多余的拷贝,这时...
3)Iterator pointing to the characterlastpointed to before the erase, orend()if no such character exists. Exceptions 1)std::out_of_rangeifindex>size(). 2,3)Throws nothing. If an exception is thrown for any reason, this function has no effect (strong exception safety guarantee). ...
erase_if(std::set) (C++20) erases all elements satisfying specific criteria (function template) Deduction guides (since C++17) Notes The member typesiteratorandconst_iteratormay be aliases to the same type. This means defining a pair of function overloads using the two types as parameter types...
Indexing 'https://en.cppreference.com/w/cpp/experimental/basic_string/erase' (depth 3)... Indexing 'https://en.cppreference.com/w/cpp/error/nested_exception' (depth 3)... URL failed (https://en.cppreference.com/w/cpp/error/get_terminate): <urlopen error [Errno 101] Network is ...
2、算法(algorithms):各种常用算法,如:sort、search、copy、erase。从实现的角度来看,STL算法是一种 function template。注意一个问题:任何的一个STL算法,都需要获得由一对迭代器所标示的区间,用来表示操作范围。这一对迭代器所标示的区间都是前闭后开区间,例如[first, last) 3、迭代器(iterators):容器与算法之间...