 array.</p>
<p>It returns <code>NaN</code> if the array is empty.</p></div></div><div class="field "><a name="compact"></a><h3><p><code><span class="label">static</span><a href="#compact"><span class="identifier">compact</span></a> (<span style="white-space:nowrap">arr:<a class="type" title="" href="../thx/ReadonlyArray.html">ReadonlyArray</a>&lt;<span class="type">Null</span>&lt;<span class="type">Float</span>&gt;&gt;</span>):<span class="type">Array</span>&lt;<span class="type">Float</span>&gt;</code></p>