 array that implements the</span>
<span class="token comment">// Ember enumerable and array interfaces</span>
Ember<span class="token punctuation">.</span><span class="token constant">A</span><span class="token punctuation">(</span>islands<span class="token punctuation">)</span><span class="token punctuation">;</span>

islands<span class="token punctuation">.</span><span class="token function">includes</span><span class="token punctuation">(</span><span class="token string">'Oahu'</span><span class="token p