statics | Embeds static resources into go files | File Utils library

You need to return either true or false from the onScreenPop function. To do that make sure you return either true or false from your showDialog. Refer this link to learn more about how to return values from showDialog in flutter.

This should be fixed by telling the compiler what Size is for the conforming classes

it's all In browser cache .. you can use a private browser or cleaning the browser cache every time you try to make any change .. and you will see your updates seems good

As per mongoose docs,

The documents returned from aggregates are plain javascript objects, not mongoose documents (since any shape of document can be returned).

The fix is to import the Module file at the beginning of your route.

As you already figured out in the comments, the tricky part about FTP passive mode is that the server uses another port (not 21) for communication. In the docker image you're using, it's a port from the 21000-21010 range by default. So you need to publish (expose) these additional container ports. In docker run command you used -p 21000-21010:21000-21010 for that.

However, Testcontainers library is designed to publish to random host ports to avoid the problem, when a desired fixed port (or a range of ports) is already occupied on the host side. In case of FTP passive mode random ports on the host side cause problems, because afaik you can't instruct the ftp client to override the port, which FTP server returned for the passive mode. You'd need something like ftpClient.connect("localhost", ftp.getMappedPort(PORT)); but for passive mode ports as well.

Therefore the only solution I see here is to use a FixedHostPortContainer. Even though it's marked as deprecated and not recommended to use because of the mentioned issues with occupied ports, I think this is a valid use case for it here. FixedHostPortGenericContainer allows to publish fixed ports on the host side. Something like:

The big downside is performance. It is much more expensive to call step 10000 times than 1 time for a given period of time.

I imagine that sooner or later there will be other effects as well, for example around the floating point precision when the dt becomes very small. E.g if an object has a very low velocity it will move a tiny distance, and if that number is very small it might not be possible to accurately store it as a floating point number (64 bit double in the case of pymunk), so that errors accumulate and the end result is a worse simulation than calling step only once.

Code snippet should work fine for you:

What I understand is that there is no current (free, open source) means for "compiling" PHP. This means that if we do not want to give source code for a key algorithm to a client, either we subscribe to one of the proprietary PHP compilers or move out of PHP.

So we have decided to move all algorithm work to Java.