Re: How to save custom variable programmatically?

[Jean Louis <bugs@gnu.support>]

* Michael Heerdegen <michael_heerdegen@web.de> [2020-11-10 17:36]:
> Jean Louis <bugs@gnu.support> writes:
> 
> > If there is anyway of storing data from Emacs that is standard I do
> > not know about it. Welcoming tips.
> 
> The eieio-persistent class is made for that purpose.
> 
> You make your data/database/whatever an object of a class you define as
> you like, and make that class inherit from eieio-persistent.  Then your
> data is savable out of the box.
> 
>   (info "(eieio) eieio-persistent")
> 
> Do you need an example?

Thank you. If you have ready simplest example it may be useful for
review.

My strategy is to minimize number of packages used as dependencies so
I try to use what is built in or to re-use what is inside of Emacs.

For simplest database with hundreds of entries file locking and Lisp
data can be enough.

For larger database I would prefer GDBM bindings built-in, but life is
not a dream.

Personally I am using PostgreSQL. Then I just define the table
definition and that may be similar to eieio.