title: Moving elements from std::vector to another one
body: <p>How can I move some elements from first vector to second, and the elements will remove from the first?<br>
  if I am using <code>std::move</code>, the elements not removed from first vector.<br>
  this is the code I wrote:  </p>
  
  <pre><code>   move(xSpaces1.begin() + 7, xSpaces1.end(), back_inserter(xSpaces2));
  </code></pre>