:set scrolloffset=30
:set scrolloffset=999
:set so=0
Sets the offset when scrolling through a document. A value of 30 will keep a marginal amount of space while scrolling, a value of 999 will keep the cursor centered in the screen, a value of 0 restores Vim's default behavior. All of the above can be added to your ~/.vimrc file to set editor defaults. Vim wikia - scroll centering
Additional buffer settings
:set list- show invisible characters:set nolist- hide invisible characters
:let i=1 | %g/fixture_\d\=$/s/fixture_\d\=$/\=i/ |let i=i+1
Matches a pattern throughout the document, increments the number.
:norm jdd
Delete every other line
12,21s/^\(\<\w\+\>\).*$/\1/g
Delete all text in the line after matching first word in lines 12-21.
:update
:e ++ff=dos
:setlocal ff=unix
:w
Useful command for removing the ^M characters that come from Windows/DOS file encodings. #1 saves the file, #2 edits file again, using dos file format ('fileformats' is ignored). #3 - buffer will use LF-only line endings when written. #4 write buffer using unix (LF-only) line endings.
Alternately, to remove ^M characters:
:%s/<ctrl-v><enter>/\r/g
:arg some/path/**/*.mdown
:argdo %s/some_expression_here/some_replacement_here/g | update
Searches recursively sub directories in some/path for files named *.markdown, then performs the substitution command provided in the second line. You can add the /gc flag if you want to confirm your substitutions. Will perform operation on all matching files.
$ vim "+%s/foo/bar/g" "+wq" foo.txt
Command line invocation of vim. Any argument passed in with a plus in front of the arguments will be run in Vim's ex mode. The command above will replace all occurances of "foo" with "bar" and write the changes. Note that any valid Vim ex mode command can be run this way.