do</code> changes.</p>
<p>Several of the <a href="https://api.emberjs.com/classes/Ember.computed.html">Ember.computed</a> macros
utilize the <code>[]</code> key to implement common use-cases. For instance, to
create a computed property that mapped properties from an array, you could use
<a href="https://api.emberjs.com/classes/Ember.computed.html#method_map">Ember.computed.map</a>
or build the computed property yourself:</p>
<pre class="language-javascript line-numbers"><code class="javascript language-java