How to do write-region, but modify

How to do write-region, but modify

[Marcin Borkowski]

Hi all,

I'd like to have a variant of write-region, which (instead of saving to
a file) "saves" the region to a temporary buffer and lets me change it
somehow there.

What I'm doing now is something like this:

--8<---------------cut here---------------start------------->8---
(let ((text (buffer-substring beg end)))
  (with-temp-buffer
    (insert text)
    (do-some manipulation)
    (write-region (point-min) (point-max) filename)))
--8<---------------cut here---------------end--------------->8---

This feels not optimal, since the text is copied twice (once to the
variable `text' and then to the temporary buffer).

Any suggestions on how to improve this code?

TIA,

-- 
Marcin Borkowski
http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski
Adam Mickiewicz University

Re: How to do write-region, but modify

[Thien-Thi Nguyen]

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() Marcin Borkowski <mbork@wmi.amu.edu.pl>
() Sat, 25 Oct 2014 16:58:22 +0200

   Any suggestions on how to improve this code?

‘insert’ is fine when you drop from above;
‘insert-buffer’ better for a sideways shove;
‘insert-buffer-substring’ best for nuanced love.

-- 
Thien-Thi Nguyen
   GPG key: 4C807502
   (if you're human and you know it)
      read my lisp: (responsep (questions 'technical)
                               (not (via 'mailing-list)))
                     => nil

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