didact | A DIY guide to build your own React | Frontend Framework library

The Common Lisp HyperSpec covers the with-slots macro. However, the example is hard to grasp.

Is there an easier and more didactic example about it?

All code for entire project is available here

The database is PostgreSQL 12.7
The backend is Java 11.0.12
I am building my TDD tests with JUnit 5.8.1

Here is CommentDaoTest.java None of it is working, but I am specifically working on getAllNotNull

Line one of the method gets an exception response that leads to a NullPointerException on line 90 of CommentPostgres.java

I am trying to use Selenium scraping on multiple elements (for personal study reasons, so for personal didactic reasons, no-profit). A multiple scrape with multiple scraped elements that create a row that will fit into the database. I have never created a multiple scraping so far, but I have always scraped single elements. So there is some problem in the code.

I would like to create this row for each round (round 1, round 2, etc.) of the championship: Round, Date, Team_Home, Team_Away, Result_Home, Result_Away. In detail, just for information and to give you a better idea, there will be 8 rows for each championship round. The total turns are 26. I'm not getting any errors, but the output is just >>>. I only receive this >>>, with no text or errors. The purpose of the request and the code is only for personal study reasons, so for personal didactic reasons, no profit. This question and this code is not for commercial or profit-making purposes.

I would like to get, for example, this:

There is a text button that says "Show more matches", it is used to scroll down the page, because no more results come out. I would like to press it automatically, but there is something wrong with my code. Can you help me please?

IMPORTANT: It is not yet on this page, but soon there will be a second button "Show more meetings", because I scroll down and find "Show more meetings", then in a few months if I go down even further and find a second button "Show more matches". In the page there is no second button yet, but I would like to make it press that too (it's the same same button, so I don't think it's complicated).

So I would like to press 2, but also 3 the same, at the same time

P.S: The purpose of the request and the code is only for personal study reasons, so for personal didactic reasons, no profit. This question and this code is not for commercial or profit-making purposes.

There is one thing that always puzzles me about va_end(). I often read that is not an actual function, but a preprocessor macro. Although this might sound like an insignificant detail, it could actually influence where va_end() needs to be invoked.

The question simply is: Does va_end() need to be invoked before each return statement in a variadic function with multiple return statements?

The variadic function in the following example has the trivial task of returning the first non-NULL of its arguments. As you can see there are three return statements in the function body. One of them appears after va_start() but before va_end().

Is this code correct?

Currently working on mapping out some template cards with some parsed json, yet I noticed I'm not returning / accessing the data returned from my fetch call properly within the .map method.

Here is a snippet of the json data:

I’m currently facing the following issue: Based on my previous question, I need to calculate the correlation between nations (Value.x and Value.y) for multiple countries for multiple years. What is the best way to achieve that?

An expected output should be something like this (for all country pairs and all years). Thus, all correlation results are stored in a table/dataframe.

This is a script, for my personal study and my educational/didactic purpose, with Tor and Selenium connection.

Both the scraping (team name list) and the Tor connection worked fine.

Then I added a code with Web Driver Wait to press the Cookie button, but now nothing works correctly anymore. The code entered is in contrast to that of Tor.

How can I solve by keeping both the Tor code and the Web Driver Wait code active?

My primeng table has button in each row, as soon as I click on any button that button should disable. But in my code all the buttons are getting disabled on a single button click. Please guide me how to disable only the clicked button (i dont want button toggle, button ones disabled show be enabled only on page refresh). I have tried below code so far.