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# Vim tricks
## Navigating help
| prefix | example | context |
| ------ | ------------- | ------------------------------------------------ |
| `:` | `:h :r` | ex command (command starting with a colon) |
| `none` | `:h r` | normal mode |
| `v_` | `:h v_r` | visual mode |
| `i_` | `:h i_CTRL-W` | insert mode |
| `c_` | `:h c_CTRL-R` | ex command line |
| `/` | `:h /\r` | search pattern (in this case, `:h \r` also works |
| `'` | `:h 'ro'` | option |
| `-` | `:h -r` | Vim argument (starting Vim) |
## Registers
: is the "last command" register. @: reruns the last command.
## Marks
mA - capital letters are global, will jump to file
`a - jumps to line and column of mark, not just line
## v/V/<c-v> as operators
Most commands act line-wise (d2j deletes two lines). v makes things
character-wise, <c-v> makes them block-wise.
## Ranges
g/regex/command # executes command on each line matching regex
v/regex/command # executes command on each line not matching regex
## Ex commands
:norm abc # runs the keys abc on each line in range
:g/abc/norm dt; # deletes until semicolon on each line with "abc"
:co <location> # copies range to location (can be ., +n, 'a)
:mv <location> # same but moves
## Visual mode
gv - selects the previous visual
g<c-a/x> - increment/decrement by 1 more on each selected line
0 1 1
0 <c-a> -> 1 g<c-a> -> 2
0 1 3
## Using vim as a hex editor?
:%!xxd
:%!xxd -r
## Spellcheck
:setlocal spell spelllang=en_us
[/]s - previous/next marked word
[/]S - previous/next bad word
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