On Thu, Jul 15, 2004 at 10:24:32AM -0400, Rick Pasotto wrote: | On Thu, Jul 15, 2004 at 06:49:20AM -0700, Sean wrote: | > hi all, | > | > i have a file like; | > | > # one 123 | > | > and i would like to APPEND a # at the beginning of each line | | 'append' means to add to the end. It is impossible to append to the | beginning of something.
Sean - you meant 'prepend'.
| > which is not started with a # . how can i do it with vi or ed, so far,
| > i 've tried;
| >
| > :%s/^[a-z]:[0-9]/#/g
| >
| > but this would CHANGE the first character of each line to a hash, pls
| > help.
|
| :%g/^[^#]/s/^/#/
I ought to learn that construct. It might come in handy sometimes!
Not being familiar with that one, I would have used a backreference.
Here's the example, for those who want to learn this feature as well.
:%s/^\([^#]\)/#\1/
(it substitutes the first character of a line with '#' followed by
the original first character)
-D
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