catalyst | JavaScript ES6 utility library for common operations | Learning library

I have a UICollectionView of rectangular cells with mostly uniform size laid out with a stock UICollectionViewFlowLayout.

I am trying to implement keyboard arrow navigation in the Catalyst version of the App. Left and right are no problem. Here is a fully laid out example:

I have a MacOS(Big Sur) app based on an existing iOS app. The Catalyst app has 4 or 5 scenes(ViewControllers) open and tiled on the screen simultaneously. The user will bounce between scenes, interacting with the app to create some composite data. All the scene are open and visible (no overlap generally, but they can be moved around as desired).

In transitioning to the Catalyst environment with a single code base, I have needed to optimize the views to optimize the big screen, multi window environment. I do this by programmatically enabling/disabling or setting values on layout constraints in the viewWillAppear method of each view controllers in conditional compile blocks under #if targetEnvironment. Everything looks great when all the window scenes first open.

Here is the problem: When leaving focus to another scene, then returning to the original scene, the conditional layout is replaced by stock iOS layout. On regaining focus, the original scene does not call the viewController's

viewWillAppear or viewDidAppear once the scene is visible, it is always Foreground/Active even if it is not topmost with focus. It stays foreground/Active until actually closed. therefore

in Scene Delegate, sceneWillEnterForeground and sceneDidBecomeActive are never called after initially opening scene.

I have tried using the window event to detect change in focus:

I have a hive external partitioned table with following data structure:

I have a Spark dataframe on which I am doing certain operations as follows. I wanted to know how do I skip processing certain records going through all the operations

I use the newest snapshot of Apache Sedona (1.3.2-SNAPSHOT) to do some geospatial work with my Apache Spark 3.0.1 on a docker cluster.

When trying out the first example in the tutorials section (http://sedona.apache.org/tutorial/sql/), I am suffering a NoClassDefException as a cause of a ClassNotFoundException:

So I need to move Point of view of the sceneview with the pan gesture in Mac catalyst app. for iPhone and iPad there is default two finger drag.

I have tried with

I'm creating a column in a dataframe that is an array of 4 structs. Any of them could be null, but since I need to have a fixed number of items in this array, I need to clean out the null items after the fact. I'm getting an error when trying to use a UDF to remove the null items though. Here's an example:

Create the data frame, notice one of the "a" value is None

I am trying to create a CI pipeline to run my unit tests. From the help of this stack overflow thread, Is there any way to run unit and ui tests for azure devops with iOS?, I have created my azure-pipelines.yml similarly

I have an Catalyst app with several independent scenes which can be open (foreground) at once. Some scenes have buttons or other controls which will open (activate, give focus to, if not currently foreground) a different scene. If the target scene is already foreground (visible, but not frontmost), I want the target scene to be active. Is this possible?

If I call UIApplication.shared.requestSceneSessionActivation on a scene that is already foreground, it opens a second copy of the target window, not activating the existing target. The options available in requestSceneSessionActivation do not seem to allow this.