How to create Custom Config Entity Drupal 8
https://www.drupal.org/node/1809494 https://codedrop.com.au/blog/creating-custom-config-entities-drupal-8

Drupal 8 : How to create the node programaticaly in drupal 8?
use Drupal\Core\Language\LanguageInterface; $node = Node::create(array(     'uid' => '1',     'title' => 'Article Test',     'type' => 'article',     'status' => NODE_PUBLISHED,     'promote' => 1,     'sticky' => 0,     'body' => array(         'value' => ...

Drupal 8 how to delete the View Config entity while uninstalling the module?
Please  see the link https://www.drupal.org/node/2565543 Or in the hook_uninstall() using the following code // Deleting the views while uninstalling. \Drupal::configFactory()>getEditable('views.view.scheduled_content')>delete();

How to use token replace in Drupal 8?
public function viewElements (FieldItemListInterface $items , $langcode ) { $entity = $items -> getEntity () ; $elements = array () ; foreach ( $items as $delta => $item ) { $value = $item -> getValue () ; // Replace the tokens with their respective values....