Vi

Vi (or Vim) is a spectacular editor. This is a quick reference to some handy vi tricks.

Display

• Line numbers - :set number
• Line and column - :se ruler
• Tabs and line endings - :se list
• Tabs
  • Tabspace :se ts=2
  • Expand tabs :se et
• Match braces - :se sm

Recording

• qq - start recording (to register q)
• q - stop recording
• @q - execute recording in register q

Substitutions

•  %s/./\L&/g - lower case whatever . matches
• ~ toggles the current character between lower and upper case.

Autocomplete

• ctrl-p - simpler auto-remember style

Enabling

autocmd FileType python set omnifunc=pythoncomplete#Complete
autocmd FileType javascript set omnifunc=javascriptcomplete#CompleteJS
autocmd FileType html set omnifunc=htmlcomplete#CompleteTags
autocmd FileType css set omnifunc=csscomplete#CompleteCSS
autocmd FileType php set omnifunc=phpcomplete#CompletePHP

Using

• Invoke - ctrl-x ctrl-o
• Accept - ctrl-y
• Cancel - ctrl-e
• Next - ctrl-n
• Previous - ctrl-p

Buffers

•  :ls, :buffers - list buffers
•  :b1 - switch to buffer 1
•  :1bw - close buffer 1
•  :bd - close current buffer

Folds

Enabling

:se foldmethod=indent
:se shiftwidth=2 # or whatever tabspace

Using

• zc - close fold
• zo - open fold
• za - toggle fold

Doc

• K - search for help on the word under the cursor

Python Doc

:au FileType python set keywordprg=pydoc

Registers

:registers = to see the contents of all registers

• The + register represents the system clipboard

"ayy yank into "a" register
"ap  paste "a" register

Viewports

:vsplit - vertical split
:split - horizontal split
^w w - to move between them