Delicious morsels of Vim awesomeness.

I was trying to figure out a setting with the comments option and wanted to work with it in a buffer rather than just viewing the results in the statusline.

:redir @a
:set comments?
:redir END

"ap results in comments=sO:* -,mO:* ,exO:*/,s1:/*,mb:*,ex:*/,:// right there in the editor for playing with.

Source

:g/Line Pattern/d A - Delete all lines matching 'Line Pattern' into appended register A (note the capitalization).

:g/Line Pattern/y B - Yank all lines matching 'Line Pattern' into appended register B.

Source