Newsgroups: comp.editors
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!ispd-newsserver!garden.ssd.kodak.com!weimer
From: weimer@garden.ssd.kodak.com (Gary Weimer (253-7796))
Subject: Re: Is there a vi command to...
Message-ID: <1991May10.165948.9707@ssd.kodak.com>
Sender: news@ssd.kodak.com
Reply-To: weimer@ssd.kodak.com
Organization: Eastman Kodak Co.; Rochester, NY
References: <4279@meaddata.meaddata.com> <1991May09.160949.12305@convex.com>
Distribution: usa
Date: Fri, 10 May 91 16:59:48 GMT


In article <1991May09.160949.12305@convex.com>, tchrist@convex.COM (Tom
Christiansen) writes:
|> From the keyboard of richt@meaddata.com (Rich Thompson):
|> :Is there any command in VI which will execute a "~" on every
|> :character on the current line to the right of the current
|> :character?
|> 
|>     map = y$mno^V^[P:s/./\~/g^V^M0"nDdd`n@n

Neat! So now we can do (from my new .exrc file):

" extensions for ~ command
"   macro called by all ~ macros
map ~_ mno^[P:s/./\~/g^M0"nDdd`n@n
map ~$ y$~_
map ~w yw~_
.
.
.

But using these brought up some interesting "features"

1) When I used the original = macro (even when I renamed it ~$), I could
   make one change to a line (let's say Line1), but the next 2 attempts
   to change Line1 failed with a beep (apparently at the `n). Every
   third attempt worked properly. If I changed Line1, then X other lines
   with the macro, I could then change Line1 again (Too lazy to figure
   out X). The 'u' command before changing Line1 the second time would
   undo all of the changes (not just the last one). If I use the = macro
   first, the ~$ macro above exibits (I think there's an 'h' in there
   somewhere) the same behavior. If I use the ~$ macro, I can modify the
   same line multiple times.

2) With both the original macro and my modified version, The ~ for the
   last character does not get executed until after the cursor is moved
   or another command is given. So if I start with:

abcdefg
  ^
  cursor here

   and do ~$, I get

abCDEFg
      ^
      cursor here

   Moving the cursor changes the g first. BUT typing ~ gives:

abCDEFG
      ^
      cursor here

   and now after moving the cursor it changes to:

abCDEFg


Assuming these are not universal for all implementations of vi, I am
running SunOS 4.1.1 on a Sparc I+ with Version SVR3.1 of vi.

Happy Debugging...

weimer@ssd.kodak.com ( Gary Weimer )