How to delete everything in a line after the last space using Notepad++?

Question

System administration

There is a list like...

100 million 1284
julian edelman 13459
100 service car 384958

In which there are 6 spaces in one line, you need to delete everything that is exactly after the last space.

Thank you.

Answer 1

Removes digits after the last space (and only digits):
Find: ^(.*) \d+$
Replace with:\1

picture

Answer 2

Find: +[^ ]+$(at the beginning before plus one space)
Replace: (empty line)
Mode - regular expressions, looped search.
Removes everything from the last whitespace to the end of the string if the string ends with a non-whitespace. Deletes the last space itself (if there is more than one, it deletes everything). If the last character in the string is a space, it does not delete anything.