title: Stretch child div height to fill parent that has dynamic height
body: <p>As it can be seen in the following fiddle, I have two <code>div</code>s, contained in a parent <code>div</code> that have stretched to contain the big div, my goal is to make those child <code>div</code>s equal in height.</p>
  
  <p><a href="http://fiddle.jshell.net/y9bM4/" rel="noreferrer">http://fiddle.jshell.net/y9bM4/</a></p>
  
  <p><img src="https://i.stack.imgur.com/cDpcM.png" alt=""></p>