delete whitespace lines with replace-regexp

delete whitespace lines with replace-regexp

[oliver]

hello

i want to use query-replace-regexp or replace-regexp to delete all lines 
contain only whitespace.

so i tried the the command with the search regexp "^\s-*$^J" (with ^J as in 
ctrl-q ctrl-j) and an empty replacement. nothing gets replaced.

what's wrong?

thanks, olli

Re: delete whitespace lines with replace-regexp

[weber]

On 12 jul, 03:53, "oliver" <oliver_baum...@nospam.justemail.net>
wrote:
> hello
>
> i want to use query-replace-regexp or replace-regexp to delete all lines
> contain only whitespace.
>
> so i tried the the command with the search regexp "^\s-*$^J" (with ^J as in
> ctrl-q ctrl-j) and an empty replacement. nothing gets replaced.
>
> what's wrong?
>
> thanks, olli

Well, it looks like you can't use '$' unless on the end of the regexp.
Anyway I tried with ^\s-*^J and it does what you want!
Sorry for the incomplete answer,
-weber

Re: delete whitespace lines with replace-regexp

[Peter Dyballa]

Am 12.07.2007 um 08:53 schrieb oliver:

> what's wrong?

The $ is too much. I'd make it, old-fashioned, this way

	M-x query-replace-regexp RET ^ [ SPC C-q TAB ] + C-q C-j RET RET

i.e.: change all lines starting with SPC or TAB and having only SPC  
or TAB until the final linefeed with nothing.

--
Mit friedvollen Grüßen

   Pete

Stau ist nur hinten blöd, vorne geht's!

Re: delete whitespace lines with replace-regexp

[Eric Hanchrow]

I know you said that you wanted to use replace-regexp, but if you're
willing to be flexible -- I'd just to

        M-x flush-lines RET ^ \s-*$ RET
-- 
Most of what ends up in my essays I only thought of when I sat
down to write them.  That's why I write them.
        -- Paul Graham

Re: delete whitespace lines with replace-regexp

[oliver]

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thanks heaps, guys!

olli


"Peter Dyballa" <Peter_Dyballa@Web.DE> wrote in message 
news:mailman.3395.1184252932.32220.help-gnu-emacs@gnu.org...

Am 12.07.2007 um 08:53 schrieb oliver:

> what's wrong?

The $ is too much. I'd make it, old-fashioned, this way

M-x query-replace-regexp RET ^ [ SPC C-q TAB ] + C-q C-j RET RET

i.e.: change all lines starting with SPC or TAB and having only SPC
or TAB until the final linefeed with nothing.

--
Mit friedvollen Grüßen

   Pete

Stau ist nur hinten blöd, vorne geht's!