title: lodash: Get duplicate values from an array
body: <p>Say I have an array like this: <code>[1, 1, 2, 2, 3]</code></p>
  
  <p>I want to get the duplicates which are in this case: <code>[1, 2]</code> </p>
  
  <p>Does <a href="https://lodash.com/" rel="noreferrer">lodash</a> support this? I want to do it in the shortest way possible.</p>