topic Re: vi editor in Operating System - HP-UX

vi editor

UniRock — Tue, 15 Jul 2008 02:49:43 GMT

Hi Everybody,

I have big text file with a lot of hashes (#), how can I view all the lines without hash on vi editor?
Where can I find a good in-depth knowledge document on vi?

Thanks,
RKK

Re: vi editor

Steven Schweda — Tue, 15 Jul 2008 03:04:29 GMT

Lines without "#" anywhere on the line?
Lines without "#" in column 1?

> [...] view [...]

View only, or change?

"man grep", look for "-v".

grep -v '#' file > file_nh ; vi -R file_nh

grep -v '^#' file > file_nh ; vi -R file_nh

Re: vi editor

Shrikant Lavhate — Tue, 15 Jul 2008 03:09:12 GMT

Hi,

For vi documents.... google with vi editor keyword. You will get lots of PDF links for vi editor documents. Few of them:
http://www.eng.hawaii.edu/Tutor/vi.html
http://unixhelp.ed.ac.uk/vi/index.html

-=ShRi=-

Re: vi editor

UniRock — Tue, 15 Jul 2008 03:16:13 GMT

Thnks for quick response,
Actually I want make changes in the uncommented lines of a file through vi editor.

-RKK

Re: vi editor

Dennis Handly — Tue, 15 Jul 2008 03:29:08 GMT

>I want make changes in the uncommented lines of a file through vi editor.

Are you talking about editing the lines one by one or some global change all?

For the former, don't edit the lines starting with "#". For the latter, you can use:
:g/^[^#]/s/foo/bar/g
Or:
:v/^#/s/foo/bar/g

Re: vi editor

UniRock — Tue, 15 Jul 2008 04:37:47 GMT

Can I do it like, getting all the uncommented lines and removing commented ones temporarily, then making unique changes to all lines (not search & replace)and finally exiting.
The commented lines should be there in the file as before when I open it again.

-RKK

Re: vi editor

Dennis Handly — Tue, 15 Jul 2008 04:45:19 GMT

>getting all the uncommented lines and removing commented ones temporarily, then making unique changes to all lines

Is it that hard to just skip to the next uncommented line? :-)

>The commented lines should be there in the file as before

You can't do this in vi. I don't know about vim nor emacs.

Re: vi editor

Torsten. — Tue, 15 Jul 2008 05:26:26 GMT

An internet search will give some good results for terms like "code folding" or "fold text" together with "editor".

Some are GUI based editors, but looks like VIM can do it too.

Try it - good luck!

Re: vi editor

Ernesto Cappello — Tue, 15 Jul 2008 05:59:42 GMT

Hi RKK, this is the command to replace all hashed "#" with nothing in vi

1) ESC
2) :g/#/s///g

the syntax is:
:g/old_text/s//new_text/g

Best regards.
Ernesto