std::experi...(std::list)(3)

okay bestie, welcome to std::experi...(std::list)(3) from the C++ Standard Libary manual — yes, that manual name is literally what the page says, iykyk. This page is all about std::experimental::erase_if(std::list), and it's lowkey iconic: you hand it a list and a predicate, and it removes everything that satisfies the predicate. 💅✨

💖 NAME 💖

• std::experimental::erase_if(std::list) — std::experimental::erase_if(std::list)

📜 Synopsis 📜

Defined in header <experimental/list>.

template< class T, class Alloc, class Pred >         (library fundamentals TS v2)
void erase_if( std::list<T, Alloc>& c, Pred pred );

Erases all elements that satisfy the predicate pred from the container. Equivalent to c.remove_if(pred);.

🎀 Parameters 🎀

• c — container from which to erase
• pred — predicate that determines which elements should be erased

🔥 Complexity 🔥

Linear. That's the whole complexity tea, no extra sprinkles. 🍓

🌈 Example 🌈

// Run this code

#include <experimental/list>
#include <iostream>

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::list<int> 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 }

🦋 See also 🦋

• remove — removes elements satisfying specific criteria
• remove_if — (function template)
• remove — removes elements satisfying specific criteria
• remove_if — (public member function of std::list<T,Allocator>)
• erase (std::list) (library fundamentals 2 TS) — erases all elements equal to a specific value from a std::list (function template)

🏷️ Category:

• Noindexed pages

mwah 💋 — that's the page, bestie. Footer tea: source http://cppreference.com, version/date 2024.06.10, page std::experi...(std::list)(3). 🫶🎀 slay and read your manpages, fr fr 💜