std::experi...(std::deque)(3)

🌸 NAME 🌸

Okay bestie, welcome to the std::experi...(std::deque)(3) page from the C++ Standard Libary manual — folded in near the top like a lil name tag, not copied as a header line. The NAME line is literally an echo chamber: std::experimental::erase_if(std::deque) — std::experimental::erase_if(std::deque). It's giving deque-flavored erase_if, and it's here to erase stuff according to a predicate. Periodt.

✨ Synopsis ✨

Defined in header <experimental/deque>
template< class T, class Alloc, class Pred >          (library fundamentals TS v2)
void erase_if( std::deque<T, Alloc>& c, Pred pred );

This one erases every element that satisfies the predicate pred from the container, fr fr. Equivalent to c.erase(std::remove_if(c.begin(), c.end(), pred), c.end());.

🎀 Parameters 🎀

• c — the container from which to erase. Bye-bye, elements.
• pred — the predicate that determines which elements should be erased. It's the vibe check for elements, iykyk.

💫 Complexity 💫

Linear. That's it. Lowkey iconic. ✨

🧚 Example 🧚

// Run this code

#include <experimental/deque>
#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::deque<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).
• erase (std::deque) — erases all elements equal to a specific value from a std::deque (library fundamentals 2 TS) (function template).

💜 Category 💜

• Noindexed pages

Sign-off tea ☕: source/version/date are http://cppreference.com, 2024.06.10, and std::experi...(std::deque)(3). Byeee, stay erased and iconic 💅🫶