jiffy | JSON NIFs for Erlang | JSON Processing library

You can downgrade the jitsi_meet package to version ^2.1.0 and the error should disappear.

I got the version number by:

1. Leaving the jitsi_meet version as empty like this:

Erlang does not compile into binary files, you still need the erlang runtime to be able to run the application, yet your final docker image is a fresh alpine install that doesn't have erlang installed

Yesterday I tried to install Ejabberd first through souce code

Just curiosity: what problems did you find, that prefered to use the Ubuntu package?

Did you install from source code? If so, did you later uninstall it? Maybe uninstallation left some files there (there was some bug related to that in make uninstall)... it will help if you can take a look at the installation paths and remove the remaining ejabberd files and directories, specially the file ejabberdctl.

and then with Ubuntu specific packages

Well, it could be that both installations get mixed... or maybe the Ubuntu package has some problem unrelated to your previous installation. Keep all investigation lines open :)

{"init terminating in [do_boot",{undef,[{ejabberd_ctl,start,[],

This error message says that erlang cannot find the file ejabberd_ctl.beam, or that the file doesn't define the function start.

Just a wild idea: maybe you are running the "ejabberdctl" script from source installation (pointing to the old ejabberd beam files), but now you have the ejabberd beam files installed in a different location (by the Ubuntu package).

Without the loop and loop2 code, it is hard to give an answer, and if the timeout is detected by one of these 2 functions, you must first change their behavior to avoid any timeout, or increase it to a value that works. If a timeout is necessary, then ensure that the return value is explicit wet it occurs, for example {error,RequestRef,timeout} rather than ok.

Nevertheless the gen_server should not wait too long for an answer, you can modify your code doing:

Instead of using gen_server:call(ServerRef,Request) in the client process, you could use:

You should return two-element tuple {:noreply, chan}, not three-element tuple {:noreply, :ok, chan} from GenDerver.handle_cast/2.

Casts are async and hence they don’t return anything. Your three-element tuple {:noreply, _, _} is treated as a response in a form

With much thanks to Alex on this question I've resolved it using the time_machine package

if it walks like date, talks like a date, it's a date

The Problem is that there is no such way to walk or such a date.

Dates are a hassle to implement properly in any language, as there are no rules defining exactly how a date should be formatted by human beings. The "arbitrarily formatted dates" you're asking for, well, they wouldn't be worth much as they wouldn't represent actual dates in a predictable manner. Check out the latest date/time related questions here on SO to get a perspective!

Using the the Dart DateTime class, you can only create a DateTime object by parsing a correctly formatted string which complies with a subset of ISO 8601

How you get to such a string from "arbitrary" input must be defined by you.

You can use some pre-defined constants to improve code readability, but using the DateTime class directly would require you to write some pretty cool code for extracting and formatting any possible perception of a date anywhere in the world into the correct syntax for creating a usable DateTime object. Maybe create a Date Input AI!

Luckily you can do a lot of heavy lifting using the class you mentioned: DateFormat Class, which is the way I would attack this.

It has ways to help you format localized date strings from input, then, together with some regular expressions you should be able to achieve what you need if you validate this based on "sane value ranges" for your application domain.

But the exact logic is something you'd be better off creating yourself, as this would vary from case to case / app to app.

change the scroll physics of list to NeverScrollableScrollPhysics

Use FutureBuilder to get data from api like this :-