std::experi...if(std::set)(3)

💖 NAME 💖

okay so bestie, this is the manual page for std::experi...if(std::set)(3) — the manual name is literally that — and it comes from the C++ Standard Libary. The NAME entry is std::experimental::erase_if(std::set) - std::experimental::erase_if(std::set). iconic 💅

🌸 Synopsis 🌸

Defined in header <experimental/set> 🦋

template< class Key, class Compare, class Alloc, class Pred >
void erase_if( std::set<Key, Compare, Alloc>& c, Pred pred );

This one is tagged (library fundamentals TS v2). iykyk ✨

It erases all elements that satisfy the predicate pred from the container. Equivalent to:

for (auto i = c.begin(), last = c.end(); i != last;)
{
    if (pred(*i))
        i = c.erase(i);
    else
        ++i;
}

🎀 Parameters 🎀

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

⭐ Complexity ⭐

Linear. literally linear, bestie ✨

🧚 Example 🧚

// Run this code

#include <experimental/set>
#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::set<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:
{ 0 1 2 3 4 5 6 7 }
Erase all items divisible by 3:
{ 1 2 4 5 7 }

👀 See also 👀

• remove — removes elements satisfying specific criteria
• remove_if (function template)

🏷️ Category 🏷️

• Noindexed pages

source/version: http://cppreference.com · date: 2024.06.10 — okay bye bestie, go erase with confidence and main character energy 💅✨🦋🎀