Method resize

src/value.cpp:389–394

void value::clear() { get_array_throw(x).clear(); }
void value::resize(std::size_t n)
{
    if(not is_array())
        MIGRAPHX_THROW("Expected an array.");
    get_array_impl(x).resize(n);
}
void value::resize(std::size_t n, const value& v)
{
    if(not is_array())