cats | extensible library for functional programming | Functional Programming library

I've the following table

The code is as follows:

I am trying to migrate project from cats-effect 2 to cats-effect 3, i am using doobie for interacting with database. Previously i could lift ConnectionIO to IO as it was described, but with the upgrade i didn't find any implementation of LiftIO[ConnectionIO], how can be same achieved with CE3?

I have a nested list of lists which contains some data frames. However, the data frames can appear at any level in the list. What I want to end up with is a flat list, i.e. just one level, where each element is only the data frames, with all other things discarded.

I have come up with a solution for this, but it looks very clunky and I am sure there ought to be a more elegant solution.

Importantly, I'm looking for something in base R, that can extract data frames at any level inside the nested list. I have tried unlist() and dabbled with rapply() but somehow not found a satisfying solution.

Example code follows: an example list, what I am actually trying to achieve, and my own solution which I am not very happy with. Thanks for any help!

I'm having some trouble using method resolution clause in Delphi 10.4.

Say I want to create a cat and a dog repository. In this case the TAnimalRepository has both cats and dogs, so I would like to implement both the cat and dog interfaces in that class.

Example:

I want to replace NA values with the mean of other column with the same year.

Note:
To replace NA values for Canada data, I want to use only the mean of Canada, not the mean from the whole dataset of course.

Here's a sample dataframe filled with random numbers. And some NA how i find them in my dataframe:

What's the easiest way with pandas to replace those NA with the mean values of the other years? And is it possible to write a code for which it is possible to go through every NA and replace them (Inhabitants, Area, Cats, Dogs at once)?

Most examples I've seen of how to test a Prisma-injected NestJS Service (e.g. prisma-sample in testing-nestjs) are for "end to end" testing. They actually access the database, performing actual queries and then rolling back the results if necessary.

For my current needs, I want to implement lower-level "integration" testing.

As part of this, I want to remove Prisma from the equation. I want the focus to be on my service's functionality instead of the state of data within the database and Prisma's ability to return it.

One big win of this approach is that it obviates the need to craft "setup" queries and "teardown"/reset operations for specific tests. Instead, I'd like to simply manually specify what we would expect Prisma to return.

In an environment consisting of NestJS, Prisma, and Jest, how should I accomplish this?

UPDATE: The author of the testing-nestjs project pointed out in the comments that the project does have an example of database mocking. It looks nice! Others may still be interested in checking out the Gist that I've linked to as it includes some other useful functionality.

I have been trying to draw border of an Image with transparent background using OpenGL in Android. I am using Fragment Shader & Vertex Shader. (From the GPUImage Library)

Below I have added Fig. A & Fig B.

Fig A.

Fig B.

I have achieved Fig A. With the customised Fragment Shader. But Unable to make the border smoother as in Fig B. I am attaching the Shader code that I have used (to achieve rough border). Can someone here help me on how to make the border smoother?

Here is my Vertex Shader :

This is my JS page where I need to implement the GridList component to show multiple tiles and is scrollable horizontally after list size crosses screen limits.

I want to define equality for some type that can be part of other objects or collections using cats/kitten. I don't want to have to define the equality for every other class. For example: