main-loop | A rendering loop for diffable UIs | Grid library

So in response to my question (How to continuously move an image smoothly in Pygame?) I was told to set my framerate in order to do my animation. But no matter where I place it, clock.tick(60) does nothing. I do clock = pygame.time.Clock() BTW. So how do I do this? I have researched and found this (pygame clock.tick() vs framerate in game main loop) but I don't really understand this.

My main game function;

All of the GStremer samples are initializing GLib main tread trough the some form of:

This is a follow on from a previous question here - I received some wonderful advice that helped me move my code along. For the next piece of the puzzle, I figured it warranted a new post - I hope that's okay.

I have some code that creates requests in a main loop, to read from or write to a file and executes each request in its own thread. With the help I got from the earlier post, I was able to extend my code to add a request queue with multiple entries and read/write functions that merely sleep for a short time to emulate file access.

Now I want to actually learn how to read and write to/from the files when there can potentially one or more threads trying to read and/or write the same file at the same time.

To make this easier to test, I limit the file to a single instance otherwise I need to consider the cases where the file doesn't exist etc. In the real application, there will be several hundred files in play but my limited understanding suggests that if I can make the locking mechanism work for a single file, it'll work when there are many.

I am still trying improve my understanding of threading and first tried adding an std::mutex with a global lock variable in the read_file() & write_file() functions but I got into a terrible mess.

Can someone please point me at the correct approach I should investigate to make this work in a robust fashion.

I am starting with Spring BOOT.

I'm new to Xamarin and I'm looking for an entry point like a main() method. Also, I have a data storage (i.e. model) class, which constantly receives data from a web socket and shall be accessible from throughout the application (i.e. from multiple ViewModels). Where can I put significant and central classes like these? Would you put these in a static class?

Also: Is there something like a main-loop which is responsible for handling tasks and events?

I'd be very grateful for a generic/primer overview of all the "entry points" within a Xamarin application.

I have an async websockets listener. That listener passes on messages from a sync main-loop. I would like to let the async websockets listener know that there's a new message to be send.

Currently I implemented that using a polling-loop (bad). I tried using cond.notify_all() but that cannot be used outside async code?

Code-fragment:

I can't understand why the following spec error occurred.

Could anyone tell me why?

First: I'm fairly new to bash batch-scripting but have experience in other script and programming languages

Second: I already looked at Meaning of "[: too many arguments" error from if[] (square brackets) but this that was not the solution for my problem.

I'm creating a command-line parser in a bash script. My first attempt actually already works but still has some if-statement code-duplication in the main-loop which I want to solve, so I moved it to the actual parsing-function and then I run into a "[: too many arguments" error which I cannot get solved (adding "" around variables did not work) in a piece of code which does work if I do not move the if.

Note: in the actual code there is one more command-line option, I left that out for 2 reasons:

1. shorter listing
2. error is seen on all options

The working code looks like this: