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From: Marc Tfardy <m-t-o___CUT__IT___@web.de>
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Subject: Re: Keep-only-column
Date: Fri, 09 Feb 2007 13:49:33 +0100
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weber schrieb:

> Here's a version to apply the function to a region.
> If there is a easier way plese tell me!
> 
> (defun keep-column-on-region (beg end &optional arg)
>   "Apply keep-column over region."
>   (interactive "r\np")
>   (save-excursion
> 	(if mark-active
> 		(let ((beg (region-beginning))
> 			  (end (copy-marker (region-end))))
> 		  (goto-char beg)
> 		  (while (< (point) end)
> 			(beginning-of-line)
> 			(keep-column arg)
> 			(next-line 1))))))

You use interactive "r" which put automatically boundary of region in
beg and end, but you still compute beg (and end) self in you code.
Why?

regards

Marc