title: Various Vim Tips
tags: vim tips

# Nir Lichtman youtube video tips
## Why vim
See [this video](https://www.youtube.com/watch?v=UTtitAidw2k) on why Nir prefers vim to IDE's
* more efficient in what you can do from the keyboard
* autocomplete can use a language server
* scrolling to line: `%` takes you to end of function; 
* `0`,`^`,`$` to go to start, first char, end of line;
* `/` and `?`: search
* 'f' and 'F': find in line

## 1
source: [this youtube video](https://www.youtube.com/watch?v=8vJKGRkiwnU)
```csv
C-n,complete word
C-x l,complete line
```
In a terminal
```csv sep=|
C-w|to allow you to use a vim command, e.g. C-w :...
```

## 2
This [youtube video](https://www.youtube.com/watch?v=0LM3Iw6dd-k)
And [this youtube video](https://www.youtube.com/watch?v=jj7MZsN_g0w)
```csv sep=|
gj,gk|move up/down within wrapped lines
```

## copen
```
:grep hello *.txt
:copen
```

## 3
From [this youtube video](https://www.youtube.com/watch?v=qUZvdo_nAxM)

## 4
See [this youtube video](https://www.youtube.com/feed/history)
* `:set ignorecase` to ignore case when searching
* `:set smartcase` case sensitive if uppercase letters present (see `:help smartcase`)

## 5
See [this youtube video](https://www.youtube.com/watch?v=1028mlsQTJM)
```
$ ctags -R src
:tag *argedupe             # completion
C-]
```

## 6
[This vim doesn't need tabs video](https://www.youtube.com/watch?v=Fgb-m4q4v1Y)
You can use splits. (I use both tabs and splits.)

* Close a window with `C-w q` to close the window but not the buffer whereas `:q` closes window
    and closes the buffer if it is the last window with that buffer.
* `:bufdo g/function/d` does this command on all open buffers

## 7
From [here](https://www.youtube.com/watch?v=cjNtDVmzr5A).
How to delete without copying:
* `:reg` shows registers
* vim copies to default reg automatically when deleting
* There is a black hole register: `"_d` to delete without copying
* named registers: `"ay`, or `"qd`.

# Opening files
```csv
gf, open file under cursor
C-w f,open file under cursor in new window
```

# Basic Stuff
## Regex Search Replace
1. Append to line: `:s/$/hello`; prepend to line: `:s/^/hello`; 
1. Prepend to first non-whitespace *without* lookbehind: `s/\(\S\)/hello\1`;
    prepend to first non-whitespace char using lookahead: `:s/\ze\S/hello` (see [here for info on lookahead/lookbehind](https://vim.fandom.com/wiki/Regex_lookahead_and_lookbehind); using lookbehind to append
    append to last non-whitespace `:s/\s*\ze$/x` (note that `$` goes after the lookahead assertion)
1. Append to `hello` using lookbehind: `:s/hello\zs/ world`

## File Tree
In neovim, `C-n` opens the file tree. (I'm not sure whether that is standard or my default config.)
Selecting a file with enter sends it to one of the open windows: if one window it will use that, if
more than one, it enumerates them `a,b,c` and you press a letter for the window you want. Use a nerdfont
if you want file and folder icons to work properly. I use Hack Nerdfont in both Konsole and Windows
Terminal.

# Various
 
## Paste setting into buffer
```
:call setreg("+", getbufvar("%", "&guifont"))
```
and then `"+p` to paste.

# Command Line History
```
:q         -- open command line history
C-c        -- copy command to command line (C-c again to exit)
C-c C-c    -- exit command line history
```

# Accessing buffers from command line


# Copying matched lines to a position
```
:g/pattern/t10
```
will copy all matching lines to position starting at line 10