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I'm searching for the way to make my code more clean and efficient. I Have an "BaseInfo" it has got some properties and also it is a parent to the "SomeInfo", and "AnotherInfo" classes, which have own additional properties. I've made a generic function that saves and gets those objects from UserDefaults. And I have ViewController that's saves and loads info using those functions, considering the type of info it should use. I want to know is there any way to make my code cleaner and get rid of those type casting in my ViewContoller. Here is my info classes:

This is my 1st question here. I'm trying to build a White Page adjustable by zoom. It's inside a JScrollPane, so the size of the JScrollPane's ScrollBars are adjustable in the Dimension of that JPanel.

I want to adjust the size of those ScrollBars as the Size of the page (variables width and height in the code) + 2 borderSize, so the full size is equal the Page + margin of a borderSize around it. It works if zoom = 1.0.

If zoom < 1.0, the scroll bar is smaller than the Page and cut a piece of it. If zoom > 1 the Dimension size is way bigger than the page, leaving a huger border on its right and down corners, bigger than the borderSize.

How do I do this?

PS: I'm started learning java by myself, in the Quarantine last year, never had a teacher, just the internet, so any critics or suggestions, please, tell me.

Here's the JPanel's code:

Looking over my Raku code, I've realized that I pretty much never use CATCH blocks to actually catch/handle error. Instead, I handle errors with try blocks and testing for undefined values; the only thing I use CATCH blocks for is to log errors differently. I don't seem to be alone in this habit – looking at the CATCH blocks in the Raku docs, pretty much none of them handle the error in any sense beyond printing a message. (The same is true of most of the CATCH blocks in Rakudo.).

Nevertheless, I'd like to better understand how to use CATCH blocks. Let me work through a few example functions, all of which are based on the following basic idea:

I have data in this form:

I am trying to get data from a table from an HTML that I created, that table has data from a table from a sqlite database.

So, for each checkbox marked in that table, I need to get the data from that row.

However, I am only receiving data from the first line, even if I mark several lines.

I've tried using the getlist, and creating an array, but without success. Since I am still learning from Flask and etc., I already looked for examples but I also couldn't find a solution.

My HTML table:

HTML code:

I have a dataframe that consists of of video game titles on various platforms. it contains, among other values the name, critic's average score and user's average score. Many of them are missing scores for the user, critic and/or ESRB rating.

What i'd like to do is replace the missing rating, critic and user scores with those for the same game on a different platform (assuming they exist) i'm not quite sure how to approach this.(note - i don't want to drop the duplicate names, because they aren't truly duplicate rows)

here is a sample chunk of the dataframe (i've removed some unrelated columns to make it manageable):

I do not understand where this error comes from, the number of arguments to the model seems correct, below is my model:

for learning purposes I am trying to use strncat in cython within a class.

I do:

I was making a simple app in vs code, and I want to save values into database, this is what I have so far.