Re: file filtering

[HS]

On 31 jan, 10:34, Peter Tury <tury.pe...@gmail.com> wrote:
> "HS" <hugo...> writes:
> > Hm... I can't imagine how "not to read into a buffer"...
> > I just tried something like this, and it works:
>
> > (defun process-file (file)
> >   (interactive "f")
> >   (with-temp-buffer
> >     (insert-file-contents file)
> >    (delete-non-matching-lines "valid [0-9]+")
> >    (replace-regexp "valid \\([0-9]+\\)" "I found a \\1" )
> >    (write-file "test2.txt" nil)))
>
> Thanks! I've already learned new things from your answer:
> with-temp-file, keep-lines, etc. And I like this solution. The only
> disturbance this goes through the whole buffer twice...
>
> And: why I can't find keep-lines in my Emacs 22's info? I really
> searched the info for similar functions before my first ask and didn't
> find this :-((

Hmm... I can find in mine and I'm also using GNU Emacs 22
"keep-lines is an interactive compiled Lisp function in `replace.el'."