classy | A classy JavaScript class library | Script Programming library

I need some help for a project I am working on for a data science course. In this project I classy the digits of the MNIST datasets in three ways:

1. using the dissimilarity matrices induced by the distances 1,2 and infinity
2. using a BallTree
3. using a neural network.

The first two parts are done, but I getting an error for the neural network code that I can't solve. This is the code.

I'm working with Snowflake and loading json files from a Staging environment to an ODS environment.

The structure of the json data looks like this:

I am trying to scrape from price data from an ecommerce website. I could do it using BS4 and getting HTML tags. code below.

In researching answers for my question here I found (after several days of very frustrating work) references to the kotlin billing library "billing.ktx" which a couple of Developer pages claim

contains Kotlin extensions and coroutines support that enable you to write idiomatic Kotlin when using Google Play's billing system

but gives neither details nor links for more information. The Play billing examples, "Classy Taxi" and "TrivialDrive" have been rewritten to use Kotlin but hardly "idiomatic Kotlin", and certainly not using coroutines, nor do they use this library. They are now two years old and showing their age in this fast moving arena.

My question is specifically what does this library offer in terms of idiomatic Kotlin or even coroutine support? I am making some headway with some billing client functions (as can be seen in the referenced question) before using this library, but I can't see what difference using it makes. To be even more specific, "launchBillingFlow" looks impossible to convert, but is it?

Just links to somewhere to find information would be enough. Why is it so hard to find more than class definitions for the billing client?

This question might seem broad, but it really isn't.
More specifically, if we are using templates, how do we distinguish what is compile time information and run time information?

I was watching CppCon video on the optimization and HFT systems and came across this example. If you are not familiar with high frequency trading systems, and insight is that they are really trying to squeeze the last few nanosecond from the benchmark, often violating the classy OOD principles in order to gain performance.

The example I want more to elaborate on is the following:

I know I have made the title as blurry as possible, but the sample will hopefully set the goals.

I have a Base class and families of Derived classes (classy OOD, nothing more).
Furthermore I have a function which takes variadic templates and I want to make decision depending on those templates.

I have one word in the text that I want to replace every 7 times to the different words word1, word2, etc. Is it possible to do something with Notepad++ or should I create with a macro?

Example:

Word: word1, word2, word3...

Sample file:

For several REPLACE decades, cars were on the list REPLACE of luxury products that only the rich could afford. However, REPLACE with the passage of time, they became a REPLACE necessity for almost everyone. Today, there are REPLACE numerous models of these vehicles that REPLACE can satisfy the needs of every buyer out there. Of all the models REPLACE, BMW is one of the most classy, sophisticated, REPLACE and stylish choice.

Expected result:

For several word1 decades, cars were on the list word1 of luxury products that only the rich could afford. However, word1 with the passage of time, they became a word1 necessity for almost everyone. Today, there are word1numerous models of these vehicles that word1 can satisfy the needs of every buyer out there. Of all the models word1, BMW is one of the most classy, sophisticated, word2 and stylish choice.

I want to filter a list of products depending on the selected filters by the user. For example:

Here is the list of products:

im new to Xamarin and i try to change the Image.Source from a Xaml.Page via a new class. Maybe someone can help me out with this.

e.g I have a PageX.xaml with a Image x:Name="ImageX" and a new ClassY

Now i would like to change the ImageX.Source from PageX when circumstance Z occurs.

Some insights on my code:

Xaml: