api/java.base/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent" class="externalLink">ExecutorService</a>&nbsp;pool)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>static int[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#countNnzPerColumn(org.apache.sysds.runtime.matrix.data.MatrixBlock)">countNnzPerColumn</a></span>&#8203;(<a href="MatrixBloc