title: Getting key with the highest value from object
body: <p>I have a object like that one:</p>
  
  <pre><code>Object {a: 1, b: 2, undefined: 1} 
  </code></pre>
  
  <p>How can I quickly pull the largest value identifier (here: <code>b</code>) from it? I tried converting it to array and then sorting, but it didn't work out, since it got sorted alphabetically (and it seems like a overkill to juggle data back and forth just for getting one value out of three).</p>