How to know when a multi-spawned process set finish its work?

[Maria Scott]

Hi Giovanni,

> So I suppose my entire code is not well written :(

Let's say I would maybe do it a bit differently ;)))

> Where can I find an example of a good code for this use case (even in 
> the standard OTP library of course, I do not fear to read OTP code :) ?

Hm, sorry, nothing comes readily to mind =^^=

Kind regards,
Maria