["goodbye!", "cruel!", "world!"]</span>
<span aria-hidden="true" class="line-numbers-rows"><a href="#C3_L1" id=C3_L1></a><a href="#C3_L2" id=C3_L2></a><a href="#C3_L3" id=C3_L3></a><a href="#C3_L4" id=C3_L4></a><a href="#C3_L5" id=C3_L5></a><a href="#C3_L6" id=C3_L6></a></span></code></pre>
<p>If your enumerable is composed of objects, there is a <a href="https://api.emberjs.com/classes/Ember.Enumerable.html#method_mapBy"><code>mapBy()</code></a>
method that will extract the named property from each of thos