Vim Registers

Parameters

FunctionalityRegisters
default register""
history registers"[1-9]
yank register"0
named registers"[a-z], "[A-Z] same as "[a-z] but appends
recall current search pattern"/
small deletes (diw, cit, ...)"-
expression registers for simple math"=
black hole register to eliminate large chunks of deleted text from mem"_
last command":
last inserted text".
filename"%
clipboard"*
selected text"+
dropped text"~

Append to a register

Yank all lines containing TODO into a register by using append operation

:global/TODO/yank A

Here, we are searching for a TODO keyword globally, yanking all lines into register a (A register appends all lines to a register).

NOTE: It is in general a good practice to clear a register before performing the append operation.

To clear a register, in the normal mode, type qaq. Confirm that the a register is empty by typing :reg and observing that a register is empty.

Copy/paste between Vim and system clipboard

Use the quotestar register to copy/paste between Vim and system clipboard

"*yy copies the current line into the system clipboard

"*p pastes the content of the system clipboard into Vim

Delete a range of lines into a named register

In Normal, type the following to delete a range of lines into a named register

:10,20d a

This will delete lines 10,20 in register "a. We can verify this by typing

:reg

This will show the text that was delete in register "a.

To paste the contents in "a, just type

"ap 

Paste the filename while in insert mode using the filename register

In Insert mode, press <C-r> and then % to insert the filename.

This technique is applicable to all registers.

For e.g. if in insert mode, you want to paste the current search pattern, you can type <C-r> and then /.