Remove lines from buffer that match the selected text

Question

When analyzing large log files, I often remove lines containing text I find irrelevant:

:g/whatever/d

Sometimes I find text that spans multiple lines, like stacktraces. For that, I record the steps taken (search, go to start anchor, delete to end anchor) and replay that macro with 100000@q. I'm searching for a function or a feature vim already has included that allows me to mark text and remove all lines containing this text. Ideally this would also work for block selection.

Answer 1

If I understood your problem right, this command should do what you want:

:g/NullPointer/,/omitt/d

Example:

Before:

1
2
3
NullPointerException1
4
5
6
omitted
7
NullPointerException2
8
9
omitted
10

After:

1
2
3
7
10

Please read :h edit-paragraph-join, there is good explanation for the command, your case is just changing join into d