Sort lists by last name

Support
1

I want to create a composersort field that sorts by composer's last name.
The information is in the composer field and I want to transpose first and last names and copy them to the composersort field. In other words,

from
field composer --- James Joyce
to
field composer sort -- Joyce, James

The post below is sort of the reverse of what I want to do, but I don't know enough about the expressions to adapt it to my need.
Editing Composers

Many thanks.

2

create an action of the type "Replace with regular expression" for the field composersort.
Enter as Search String: (.) (.)
Enter as Replace String: $2, $1

Works only for names that really only are composed of a first and a last name and not several first names.

3

Read there ...
Composersort mit mehreren Personen
Composersort mit mehreren Personen

DD.20140215.2029.CET

4

Danke.