binder

binder1st < equal_to<int> > equal_to_10 (equal_to<int>(),10);

binder2nd < less<int> > IsNegative (less<int>(),0);

binder1st

binder2nd

#include <iostream>
#include <functional>
#include <vector>
#include <algorithm>
 
int main()
{
    std::vector<int> v = {1, 0, -4, 2, 5};
    std::cout << *std::find_if(v.begin(), v.end(), std::bind2nd(std::less<int>(), 0)) // (элемент) < 0
              << *std::find_if(v.begin(), v.end(), std::bind1st(std::less<int>(), 0)); // 0 < (элемент)
}

binder1st, binder2nd