Quickfix list

• A quickfix list is a set of positions in one or more files
• A quckfix list is global. Not local to a particular buffer.
• A quickfix list is not the quickfix window. The window can show the list. The list is a datastructure.
• A changelist is local to its buffer.

Registers

• 0 contains the content of the last yank

• 1-9 contains the content you've deleted or changed

• _ blackhole register - send something here and it wont change any other register.

• - contains any deleted or changed content smaller than 1 row.

• % contains the name of the current file.

Expression register

1. In insert mode, <C-r>=.
2. Type any valid vimscript.
3. The output is inserted into the buffer.

Substitutions

• :&& → repeat the last substitution command with its flags
• :~ → repeat the lat substitution with the same replacement, but with the last used search pattern

Command line

• q: - opens the command line window. Good for yanking and viewing previous commands
• :<C-f> - open command history list
• :UltiSnipsEdit - opens the ultiSnips file for the current buffers filetype. See which snippets are defined.

Delete stuff without leaving insert mode:

• <C-h> - same as backspace
• <C-w> - delete previous word
• <C-u> - delete everything before cursor (on same row)
• <C-d> or <C-t> - (un)indent a row
• <C-e> - delete next word

Text objects

• gf - edit the file at the file path under the cursor (useful for netrw?)

• gx - open the file at the file path under the cursor (useful for netrw?)

• [m, ]m - move to the start or end of a method

• @: - repeat the last command

• >> will indent a line. . will repeat the operation, so >>.. would indent a line 3 times.

  You can use this along with a count, which will do the indention for n number of lines (with the current line being the top line). 3>>.. will indent 3 lines 3 blocks to the right.

Screen Movement

• <C-y> - up one line, and moves the cursor if it would go off the screen
• <C-e> - down one line, and moves the cursor if it would go off screen
• <C-f> - down one page, with cursor at top of screen
• <C-b> - up one page, with cursor at bottom of screen

Sources

1. The Valuable Dev has a lot of great tips.
2. Vim for Python has some great notes on linting and code completion plugins that I've either copied or was more or less doing already.