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On . By CodimTh

Simple snippet on how to update node fields programmatically in drupal 8.

Fisrt import Node entity: 

use Drupal\node\Entity\Node;

Then use below code inside a function where you want to update the nodes.

 * hook_cron(): called every time the Drupal cron runs
function mymodule_cron()
  $query = \Drupal::entityQuery('node')
    ->condition('nid', '1');
  $nids = $query->execute();
  $nodes = Node::loadMultiple($nids);
  foreach ($nodes as $node) {
    $node->set("title", strtoupper($node->title->value));
  \Drupal::messenger()->addMessage('Nodes updated');
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