PFD | Python scripts for scraping data from various websites | Dataset library

To be clear, I've extensively tested this code and found the issue is somewhere with the code written prior to the WGL code. It's precisely in the WIN32 code. Now I think it could partially be caused by calling gluOrth2D but even then, that shouldn't be the primary cause as far I as I understand. I may figure this out myself just by messing with stuff but considering this issue (that occured in a much larger project) has taken up a lot of my time I thought it was worth posting this encase anyone else runs into the same problem. I'm hoping for an explanation as well as fix/correction.

I'm trying to reproduce the behavior of bash pipes using pipe and dup2, and it works fine for one pipe, because the first and the last have just either input or output redirected, but when I add multiple in a row it doesn't work (when both input and output are redirected to the pipe), the inputs and outputs seem to mess up with each other, so do we need to sleep between each command? I saw while reading documentation that executables are run at the same time and that we shouldn't wait for the previous child process to end so I don't wait. Here's the wrong part of my code:

I am writing a multi-threaded program where, among other things, I have a thread listening to a socket for incoming network connections. To allow this to be interrupted, I am using poll in combination with signalfd (rather than a raw await call). However, I also have other threads that I need to be able to notify of potential interrupts, so I am using a sigwait call in a dedicated thread to wait for signals. My attempt to get the race to occur is in the code below:

For example, we have $(ls):

I want to display a list of images and pdf files that I am getting from API in response by separating them into PFD and image. I have successfully displayed an images list that I am getting from API in circleAvatar using image.network, but now I am not getting the idea of how do I display a pdf list so that when I tap one pdf it opens in a viewer. below is the image of how I want to display it in the list -:

the first blue circle is empty because it has a pdf path and the next has an image.

code for displaying the image and pdf file -

I have the below method to get a file doc, pfd... from the backend. How can i download the file in this same method ?

so I have figures like this:

I'm coding udp server, which can listen multiple ports. As the method of paralleling I use function poll(). So server get two ports in argc, and then try to listen the range of ports. Then open msg.txt, where saves all the information, which he get from clients. A then waiting for them. But the problem is that with poll(), my server can listen only one port. But if I delete this function, server accept messages from all ports. What can be a problem?Here's my code:

I cannot understand why the triangle rendered in the example below has black color (automatic interpolation does not work)