How do you use the expression register to evaluate Vimscript?
<C-r>=expand('%:t')<CR>
In insert mode, = opens the expression register.
Tag: registers
How do you use registers to exchange two pieces of text?
"adiw then move, "aP and diw
Delete the first word into register a with "adiw, move to the second word, paste register a before with "aP, then delete the remaining original.
How do you use the expression register to insert a calculation?
<C-r>=42*7<CR>
In insert mode, press = to access the expression register, type a math expression like 42*7, and press Enter to insert the result (294).
How do you change the case of text stored in a register?
:let @a = toupper(@a)
Use Vimscript functions toupper() or tolower() with :let @a = toupper(@a) to convert the case of the entire register contents.
How do you use the alternate file register?
<C-r>#
The # register holds the alternate (previously edited) filename.
How do you delete text without affecting any register?
"_dd
Use the black hole register " before a delete command.
How do I paste from a register in the command line?
<C-r>{reg} in command line
While on the : command line, pressing followed by a register name inserts that register's contents.
How do I copy the entire current line to the system clipboard?
"+yy
The "+yy command yanks the current line directly to the system clipboard register, making it available for pasting in other applications.
How do I access the alternate file register?
"# register
The # register contains the name of the alternate file — the previously edited file in the current window.
How do I copy the contents of one register to another?
:let @b = @a
The :let @b = @a command copies the contents of register a into register b.
How do I delete a word and save it to a specific register?
"adiw
The "adiw command deletes the inner word under the cursor and stores it in register a.
How do I debug a macro by executing it step by step?
Paste with "ap and execute keys manually
To debug a macro, paste its contents into the buffer, read each keystroke, and execute them one at a time to find where the macro goes wrong.
How do I record a macro to wrap each word in quotes?
qaciw"<C-r>""<Esc>wq
This macro wraps the current word in double quotes by changing the word, inserting quotes around the original content, and moving to the next word.
How do I capture command output into a register?
:redir @a | command | redir END
The :redir command redirects Vim's command output to a register, file, or variable.
How do I copy and paste to the system clipboard?
"+y and "+p
The "+ register is linked to the system clipboard.
How do I see what keystrokes a macro contains?
:reg a
The :reg a command shows the contents of register a, which reveals the keystrokes stored in the macro.
How do I access and reuse the last search pattern?
"/ register
The / register contains the most recent search pattern.
How do I access previous deletions from the numbered registers?
"1p through "9p
Registers 1-9 contain the last 9 deletions or changes that are at least one line long.
How do I create a macro without recording it?
:let @a = "Iprefix: \<Esc>"
The :let @a = ".
How do I access the text from my last insert session?
".
The .