<p>A <code>data.table</code>.</p></td>
    </tr>
    <tr>
      <th>pattern</th>
      <td><p>A regular expression as in <code>grepl</code>.</p></td>
    </tr>
    <tr>
      <th>...</th>
      <td><p>Arguments passed to <code>grepl</code>.</p></td>
    </tr>
    <tr>
      <th>checkDT</th>
      <td><p>If <code>TRUE</code> (the default), will error if <code>DT</code> is not a <code>data.table</code>.</p></td>
    </tr>
    </table>
    

    <h2 class="hasAnchor" id="examples"><a class="anchor" href="#exam