$pages->not($args)

• $args (Page | string)
  Excluded pages can be specified by passing the entire $page object, the UID or full URI
• return ($pages)
  

Example

<h2>All pages except project-b</h2>
<ul>
  <?php foreach($page->children()->not('project-b') as $subpage): ?>
  <li>
    <a href="<?= $subpage->url() ?>">
      <?= $subpage->title()->html() ?>
    </a>
  </li>
  <?php endforeach ?>
</ul>

Pass collection as argument

(since 2.3.0+)
You can now pass a collection as argument as well:

<ul>
  <?php
  $excluded = $page->children()->filterBy('template', 'some_template');
  foreach($page->children()->not($excluded) as $subpage): ?>
  <li>
    <a href="<?= $subpage->url() ?>">
      <?= $subpage->title()->html() ?>
    </a>
  </li>
  <?php endforeach ?>
</ul>