Function random_element

include/fplus/transform.hpp:215–222

// Also known as choice.
template <typename Container>
typename Container::value_type random_element(
    std::uint_fast32_t seed, 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);
    return elem_at_idx(dis(gen), xs);
}

// API search type: random_elements : (Int, Int, [a]) -> a
// fwd bind count: 2