C++ Erase elements from containers by indices

erase_elems_by_indices.cpp

// https://coderwall.com/p/jsxrdq/c-erase-elements-from-containers-by-indices

template<typename Cont, typename It>
auto ToggleIndices(Cont &cont, It beg, It end) -> decltype(std::end(cont))
{
    int helpIndx(0);
    return std::stable_partition(std::begin(cont), std::end(cont), 
        [&](decltype(*std::begin(cont)) const& val) -> bool {
            return std::find(beg, end, helpIndx++) == end;
        });
}

std::vector<int> v;
v.push_back(0);
v.push_back(1);
v.push_back(2);
v.push_back(3);
v.push_back(4);
v.push_back(5);

int ar[] = { 2, 0, 4 };
v.erase(ToggleIndices(v, std::begin(ar), std::end(ar)), v.end());