How to delete the last word from each line in vim?

Question

Please let me know, How I can remove the last word from each line using vim commands? Before :

abcdef 123
xyz 1256
qwert 2
asdf 159

after :

abcdef
xyz
qwert
asdf

Similarly please let me know how to remove the second word from each line using vim command?

Answer 1

Use the following regex (in ex mode):

%s/\s*\w\+\s*$//

This tells it to find optional whitespace, followed by one or more word characters, followed by optional whitespace, followed by end of line—then replace it with nothing.