Function random_elements

include/fplus/transform.hpp:231–241

// Example call: random_elements(std::random_device()(), 10, xs)
template <typename Container>
Container random_elements(
    std::uint_fast32_t seed, std::size_t n, const Container& xs)
{
    assert(is_not_empty(xs));
    std::mt19937 gen(seed);
    std::uniform_int_distribution<std::size_t> dis(0, size_of_cont(xs) - 1);
    const auto draw = [&]() -> typename Container::value_type {
        return elem_at_idx(dis(gen), xs);
    };
    return generate<Container>(draw, n);
}

// API search type: apply_functions : ([(a -> b)], a) -> [b]
// fwd bind count: 1