A question about kill-region after reading emacs-lisp-intro

A question about kill-region after reading emacs-lisp-intro

[Hu Wei]

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In the body of kill-region there is a statement as
        (when string
          (if (eq last-command 'kill-region)
              ;; if true, prepend string
              (kill-append string (< end beg))
            (kill-new string)))

The purpose is "The if expression checks whether the previous command was
kill-region. If it was, concatenates a copy of the newly clipped text to the
just previously clipped text in the kill ring. If you then yank back the
text, i.e., `paste' it, you get both pieces of text at once. That way, if
you delete two words in a row, and then yank them back, you get both words,
in their proper order, with one yank. (The (< end beg)) expression makes
sure the order is correct.)"

But how can I delete two words in a row£¿I have to set mark between two
deletions, and this would cause last-command to change.  Is there some
advanced function I don't know?

-------------------
Yours sincerely,
Hu, Wei
My CV can be found at http://mail.ustc.edu.cn/~roy/

Re: A question about kill-region after reading emacs-lisp-intro

[Floyd Davidson]

"Hu Wei" <roy@mail.ustc.edu.cn> wrote:
>In the body of kill-region there is a statement as
>        (when string
>          (if (eq last-command 'kill-region)
>              ;; if true, prepend string
>              (kill-append string (< end beg))
>            (kill-new string)))
>
>The purpose is "The if expression checks whether the previous command was
>kill-region. If it was, concatenates a copy of the newly clipped text to the
>just previously clipped text in the kill ring. If you then yank back the
>text, i.e., `paste' it, you get both pieces of text at once. That way, if
>you delete two words in a row, and then yank them back, you get both words,
>in their proper order, with one yank. (The (< end beg)) expression makes
>sure the order is correct.)"
>
>But how can I delete two words in a row£¿I have to set mark between two
>deletions, and this would cause last-command to change.  Is there some
>advanced function I don't know?

You can precede any kill command with append-next-kill to get the
same effect as two sequential kill commands.

--
Floyd L. Davidson           <http://web.newsguy.com/floyd_davidson>
Ukpeagvik (Barrow, Alaska)                         floyd@barrow.com

Re: A question about kill-region after reading emacs-lisp-intro

[Kai Grossjohann]

"Hu Wei" <roy@mail.ustc.edu.cn> writes:

> But how can I delete two words in a row£¿I have to set mark between two
> deletions, and this would cause last-command to change.

Hm?

Just hit M-d twice to kill two words.  (I presume you mean kill, not
delete.  Delete does not add to the kill-ring.)

Kai