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From: carlson@mrx.webo.dg.com (James Carlson)
Newsgroups: comp.editors
Subject: Re: Substituting on even or odd line numbers in VI?
Message-ID: <1376@dg.dg.com>
Date: 26 Jun 91 19:18:01 GMT
References: <1991Jun26.025626.29367@massey.ac.nz> <3706@wn1.sci.kun.nl>
Sender: root@dg.dg.com
Reply-To: carlson@mrx.webo.dg.com
Organization: Data General Corporation, Westborough, MA
Lines: 28

>	:2,$g/^/s/foo/bar/g|+t+|-d

Wow!  That's as clear as mud!  For reference, executing:

	select +1
	repeat *

In KEDIT (or XEDIT) will select for editing all of the even lines.  You can then
execute any commands against this subset (including block mark/copy/move/delete
and global search/replace).  To return to viewing and editing the whole file,
enter:

	all

(To get 2 out of every three, do "1 select +1" instead.  To reverse the
selection (to 1 out of 3 or to the odd lines in the previous example) use:

	display 1

Since all that the 'select' command really does is tag each line (default 0)
with a level number, you can switch back and forth between the displayed and
undisplayed lines with a single command.  For humor value, you could bind this
to a key ...)

-- 
Disclaimer:  I cannot speak for Data General.  You should have guessed that.
Mail to:  carlson@mrx.webo.dg.com  -or-  James_Carlson@dgc.mceo.dg.com
.//.