Some Notes on Vim

Some notes on Vim window management, Tab Management and Other Stuffsa..

Window Management

a window in Vim is the viewport for a buffer. following are a few useful window management command:

Key Binding	Command	Action
`<C-w> o`	`:on`, `:only`	close all windows except the current one
`<C-w q`		close focused window
`ZZ`		close focused window after saving changes
`ZQ`		close focused window without saving changes
`<C-w v`	`:vsplit`	split window vertically
`<C-w s`	`:split`	split window horizentally
`<C-w H/J/K/L`		move window to a direction
`<C-w h/j/k/l`		switch between windows
`<C-W> f`		split the window and edit filepath under cursor

a/file/path.md 20: when the cursor is on filepath, pressing <C-W F would open the filepath in a split window and jump to line number(20 in this case)

Tab Management

a Tab in Vim holds one or more windows. multiple Tabs can be open to holds windows. In other words, windows can be grouped together by their relevance.

Key Binding	Command	Action
	`:tabe[dit]`, `:tabnew`	open a Tab
	`:tabc[lose]`	close a Tab
	`:tabe FILEPATH`	open a filepath in new tab
	`:tabo[nly]`	close all tabs except for the focused one
`gt`		go to next tab page
`gT`		go to previous tab page
`<C-W> gf`		open the filepath under cursor into a new tab
	`:tabp`	go to previous tab
	`:tabN`	go to next tab
`[count]gT`		go to [count] tab
	`:tabfir[st]`	go to first tab
	`:tabl`	go to last tab
	`:tabs`	list open tabs

:tabnew and tabe command can be prefixed with +, -, 0, $ to open Tabs at desired locations
a/file/path.md 20: when the cursor is on filepath, pressing <C-W gF would open the filepath in a new tab window and jump to line number(20 in this case)

Registers in Vim

Registers in Vim are simply different locations where Vim could store texts.
a register can be accessed by using " as prefix. For example: key "r can access register r.

What content a register is currently holding, can be revealed by using command :reg <name of register>. Without the name, reg command would list all registers filled with certain data.

Register Operations

yank to register x: "xyw
delete to register d: "ddw
put from register a: "ap

Types of Registers

There are ten types of register vim comes with. Here are some of the most important ones.

unnamed register
named register
numbered registers
blackhole register ("_)
read-only registers
expression register("=)
search register

Unnamed Regist

vim have a default registers, which is used if the commands are not prefixed with a register name. This register is known by the name unnamed register. This register can be accessed with "". This register would always contain the latest yanked/deleted texts.

Named Registers

There are 26 named registers. By default, they are not being used by Vim. To use, say a register, one should prepend command with "a. For example: "adw (delete a word and store in a register).

There are two ways to use named register. If one uses small caps alphabet, the content which was previously stored in it, would be overriden. In case of capital letter, the content would be appended.

Numbered Register

Denoted by numbers 0 to 9. These registers stores previously yanked and deleted content. Register 0 would store the latest yank. And register 1 to 9 would store the last 9 deleted texts(even after shutdown and reboot). 1 being the latest and 9 the oldest delete.

One does not loose yanked/deleted texts in vim. They just don't know where to look for it!

Blackhole Register

Black Hole Register is a register which does not stores anything. Whatever is directed to this register, would get vanished. This register is denoted by _("_d would completely delete a word. obviously, can be brought back using u).

Read-only Registers

As the name suggests, they can't be used by user for the purpose of storing arbitary texts. There are 4 read-only registers:

".: Stores the last inserted texts.
"%: Stores the current(relative) file path
":: Stores most recently executed command. Goes quite handy with @(command runner. example, @:)
"#: stores the (relative) location of alternate file for current window.

Expression Register

This register stores the value of an expression. When <C-r>= is pressed in insert mode, a = sign would show up in command line. Any expression run in command line would be stored in expression register ("=).

Example: <C-r>=system('ls') would write down the result of ls under cursor-line, and store the command in = register.

Search Register

Stores the latest search term searched with /, ?, * or #. Useful when one needs to re-type a complex term or RegEx. Can be accessed using <C-r>X(where X is /, ?, * or #).

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