Module development and code questions

Hi im trying to remove the order adjustments by code.

i check in the commerce documentation:

https://docs.drupalcommerce.org/commerce2/developer-guide/pricing/adjust...

And i do this:

Hello, am newbie to drupal. I installed drupal on my localhost and install Danland for my theme to use. I like the theme as it looks clean and chose this for my project. I am trying to make the main primary menu sticky when scrolling up. Need solutions to make this happen. Thanks

When I visit a node list page e.g. https://my_site/en/admin/content/my_nodes with default English language all links for each node in the list shown with English prefix "en" in its URL i.e. https://my_site/en/my_node/custom_alias/50 , so far so good ...                      ...      

The following is an example .routing.yml file:

example.content:
  path: '/example' 
  defaults: 
    _controller: '\Drupal\example\Controller\ExampleController::content' 
    _title: 'Hello World'
  requirements: 
    _permission: 'access content' 

As you can see, the keys '_controller', '_title' and '_permission' begin with an underscore.

I already figured out, that every key without an underscore under the 'defaults'-key is considered to be a parameter to the controller.

Hi everyone,

How can I add the XML Sitemap field configuration when I create a taxonomy term programmatically?

I'm using the XML Sitemap module that comes with Drupal 9 core and I've configured the module so that the relevant vocabulary is included in the sitemap.

In order to get an idea, I created a term and tried to see the field as follows:

Is there a way to tag an option in a dropdown menu as "selected"?  

For example in HTML  <option value="gg" selected="selected">g g: (No Grey)</option>

I've tried to find one but came up empty.