Move the cursor backwards to the end of the 1st word on it's between 2 words

Question

If the cursor is placed on a whitespace and there're multiple whitespaces between 2 words, how can I move the cursor backwards to the end of the 1st word?

Answer 1

You could call forward-whitespace with a negative prefix argument. You can bind this to a key with a lambda. For example, bind it to M-B:

(global-set-key (kbd "M-B") (lambda () (interactive) (forward-whitespace -1)))

Answer 2

You could

1. move cursor to the beginning of the first word with M-b (backward-word)
2. and then move forward with M-f (forward-word), which place cursor after the end of the first word.

For example (* means point):

0: first    *   second
1: *first       second
2: first*       second

If you want always go to the end of the word when moving backward, then use in init.el

(defun backward-word-end ()
  "Move backward to the end of the word."
  (interactive)
  (backward-word 2)
  (forward-word))

(global-set-key (kbd "M-b") 'backward-word-end)

P.S. But don't forget about local-set-key and bind-key if you use package.