Re: file filtering

[Peter Tury]

"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 :-((