he ret array should be of length ru - rl.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="Array.html#extractDouble(double%5B%5D,int,int)">extractDouble</a></code>&nbsp;in class&nbsp;<code><a href="Array.html" title="class in org.apache.sysds.runtime.frame.data.columns">Array</a>&lt;<a href="DDCArray.html" title="type parameter in DDCArray">T</a>&gt;</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>ret</code> - The array to return</dd>
<dd