filter_2.cpp

#include <algorithm>
#include <iostream>
#include <vector>

int main(void) {
    // Create a vector
    std::vector<uint32_t> v = {1, 2, 3, 4, 5};

    // Filter by erase-remove
    v.erase(std::remove_if(v.begin(),
                           v.end(),
                           [&](const uint32_t v) {
                             return v < 4;
                           }),
            v.end());

    // Outputs to:
    // 4
    // 5
    for (const auto & r : v) {
        std::cout << r << '\n';
    }

    return 0;
}