Answered Are template variables changed by $resource->save() ?

$c = $modx->newQuery('modResource');
$query_params = array(
	'parent'      => 42,
);
$c->sortby('pagetitle','ASC');
$c->where($query_params);
$total = $modx->getCount('modResource',$c);
$resources = $modx->getIterator('modResource',$c);
$n=0;
foreach ($resources as $resource) {
	$id         = $resource->get('id');
	$foo        = $resource->getTVValue('foo');  // get a TV just to see if it’s set
	$bar        = $resource->getTVValue('bar');  // get a TV just to see if it’s set
// do some work on the content here…
	$my_content = 'whatever…'; // for example
// update $resource:
	$resource->set('content',$my_content); // update the content
	$resource->set('menuindex',$n);
// save the updated resource:
	$resource->save();
	$n++;
}