title: can I use flexbox and float at the same time? or use flexbox with absolute positioning?
body: <p>for example if I have a 2 column layout (main content and a aside) Can I float the main to the left and aside to left/right and then use flexbox to give the aside an equal height compared to the main content?</p>
  
  <p>Do I have to display the whole container to flexbox to include header,main content, aside, and footer or can I just cherry pick one area to use flexbox?</p>