std::experimental::erase_if (std::vector) - cppreference.com (original) (raw)
 |
Merged into ISO C++ The functionality described on this page was merged into the mainline ISO C++ standardas of 11/2018, see std::erase_if (since C++20) |
|---|
| | | | | ------------------------------------------------------------------------------------------------------------------------------------ | | ---------------------------- | | template< class T, class Alloc, class Pred > void erase_if( std::vector<T, Alloc>& c, Pred pred ); | | (library fundamentals TS v2) |
Erases all elements that satisfy the predicate pred from the container. Equivalent to c.erase(std::remove_if(c.begin(), c.end(), pred), c.end());.
[edit] Parameters
| c | - | container from which to erase |
|---|---|---|
| pred | - | predicate that determines which elements should be erased |
[edit] Complexity
Linear.
[edit] Example
#include <experimental/vector> #include template<typename Os, typename Container> inline Os& operator<<(Os& os, Container const& container) { os << "{ "; for (const auto& item : container) os << item << ' '; return os << '}'; } int main() { std::vector data{3, 3, 4, 5, 5, 6, 6, 7, 2, 1, 0}; std::cout << "Original:\n" << data << '\n'; auto divisible_by_3 = [](auto const& x) { return (x % 3) == 0; }; std::experimental::erase_if(data, divisible_by_3); std::cout << "Erase all items divisible by 3:\n" << data << '\n'; }
Output:
Original: { 3 3 4 5 5 6 6 7 2 1 0 } Erase all items divisible by 3: { 4 5 5 7 2 1 }