UNIX for Dummies Questions & Answers

On Unix, it is easy to get those lines that match a pattern, by

Code:

grep pattern file

or those lines that do not, by

Code:

grep -v pattern file

but I am editing a file on Windows with Ultraedit.
Ultraedit support regular expression based search and replace.
I can delete all the lines that match a pattern, by

Code:

s/^.*pattern.*$//

but how can I delete all the lines that do not match this pattern?
look ahead assertion may be an option, but it is not surpported in Ultraedit,
can any body help me with this?

Did you try:

Code:

s/^.*[^pattern].*$//