suresh-kumara-gist

$("#time-report > tbody > tr.last-level").each(function( index ) {
 var text = $( this ).find("td.name").text();  
 // text will have  "Support #20767: WG: Payment Transaction Failed Reminder "
 // pop()   javascript function removes last element in a array 
 // shift()  javascript function removes first element in a array 
 var issue_id =  text.split('#').pop().split(':').shift(); 
 var issuelink = $('<a href="/issues/' + issue_id + '" target="_blank">' + text + '</a>'); 
 $( this ).find("td.name").html(issuelink);
});

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   $course_id = $values->_relationship_entities[order_items]->get('field_course')->target_id;
      $student_id = $values->_entity->get('uid')->target_id;

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$query = \Drupal::entityQuery('attendance')
    ->condition('type', 'student_attendance_tracking', '=')
    // entity refernce field
    ->condition('field_course',  433, '>=');
    $courseRatings = $query->execute();
    return $courseRatings;

 // get all Course Ratings.
  function getCourseRatings($groupId) {
    $query = \Drupal::entityQuery('attendance')

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function hook_preprocess_paragraph(&$variables) {
  //kint($variables['content']['field_class_label'][0]['#text']); die();
  if ($variables['content']['field_class_label']['#items']) {
    $variables['content']['field_class_label'][0]['#text'] = $variables['content']['field_class_label']['#items']->getString();
  }
}

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$form['actions']['submit']['#submit'][] = "attendanceSubmithandler";  

or 

// Set redirect 
$form_state->setRedirect("attendance_management.feedback_message"); 

// attach library
$form['#attached']['library'][] = 'attendance_management/fivestar_widget';
 

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function attendance_management_field_widget_form_alter(&$element, &$form_state, &$context) {
  if ($element['#title'] == "class label" && $element['#field_parents']['0'] == 'field_sessions_classes') {
    $delta = $element['#delta'];
    $attendance = \Drupal::routeMatch()->getParameter('attendance');
    $classlabel =  $attendance->field_sessions_classes->referencedEntities()[$delta]->field_class_label->getValue()['0']['markup'];
    $element['markup']['#text'] = $classlabel;
  }
}

suresh-kumara-gist

dbus-send --system \
   /org/freedesktop/login1 \
   org.freedesktop.login1.Manager.PrepareForSleep \
   boolean:false

suresh-kumara-gist

Creating custom table in drupal 8 is not recommended. Create entity types instead.  
But if you want to Create custom table you can create either by implementing hook_schema or 
else create schema file config/schema/your_custom_module_name.schema.yml  in your module 
(https://www.drupal.org/docs/8/api/configuration-api/configuration-schemametadata). 

( https://drupal.stackexchange.com/questions/219580/best-practice-for-creating-table-in-custom-module  )

1. Implementing  hook_schema in .module file (Not recommended).

/**

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select nfd.nid,nfd.title, CASE casefield
  WHEN 0 THEN '0'
  WHEN 1 THEN '1'
  ELSE NULL
  END as casefieldalias 
from table1 nfd
join table2 d on nfd.nid = d.tid
where title like '%<%' or title like '%>%' and type in ('testtype');

suresh-kumara-gist

jQuery('input:checkbox').attr("checked", "checked");