How can I get a pointer to the first element in an std::vector?

Question

I want to write data from an std::vector to a socket, using the write function, which has this prototype:

ssize_t write         


        

Answer 1

my_vec.empty() ? 0 : &my_vec.front()

If you would like an std::out_of_range to be thrown if vector is empty, you could use

&my_vec.at(0)