title: How can I create a folder if it doesn't exist, from .vimrc?
body: <p>I don't like how Vim clutters up my folders with backup files, so I have the following line in my .vimrc file:</p>
  <pre><code>set backupdir=~/.vim_backup
  </code></pre>
  <p>However, sometimes this folder doesn't exist because of new machines where I am copying my user files over.</p>
  <p>How can I create this folder automatically if it doesn't exist, from within .vimrc? Or is there some better way to deal with this situation?</p>