<p dir="auto">Challenge <a href="http://freecodecamp.com/challenges/waypoint-manipulate-arrays-with-unshift" rel="nofollow">http://freecodecamp.com/challenges/waypoint-manipulate-arrays-with-unshift</a> has an issue.<br>
The error is in the assert function. It says <code class="notranslate">toLowerCase()</code> is not a function</p>
<p dir="auto">Challenge <a href="http://www.freecodecamp.com/challenges/waypoint-manipulate-arrays-with-unshift" rel="nofollow">http://www.freecodecamp.com/challenges/waypoint-manipulate-arrays-with-unshift</a> has an issue. Please describe how to reproduce it, and include links to screenshots if possible.</p>
<p dir="auto">I entered myArray.unshift(["Paul"]);<br>
the error message d[0].toLowerCase is not a function</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://cloud.githubusercontent.com/assets/12203531/9456073/cc6dc8b2-4a87-11e5-90b1-18fe034d5a3d.jpg"><img src="https://cloud.githubusercontent.com/assets/12203531/9456073/cc6dc8b2-4a87-11e5-90b1-18fe034d5a3d.jpg" alt="unshift" style="max-width: 100%;"></a></p>
<p dir="auto">Thanks</p>