:s/\d\+/\=submatch(0)+1/g
The \= prefix in a :substitute replacement field tells Vim to evaluate the following as a Vimscript expression rather than treating it as a literal string.
:echo strtrans(@q)
When a macro behaves unexpectedly, :echo strtrans(@q) reveals exactly what is stored in register q—including invisible control characters—as human-readable
:let @a = system('cmd')
You can populate any Vim register with the output of an external shell command using :let @{register} = system('{command}').
:let @q='commands'
Macros in Vim are stored in registers as plain text.
"%p
Vim has several read-only registers that hold special values.
<C-r><C-a>
When you are in command-line mode, inserts the word under the cursor (alphanumeric and _ only).
:let @a = @a . @b
You can manipulate register contents directly using the :let command with the @{reg} syntax.
:let @a = "value"
The :let @{reg} = expr command lets you assign any string or expression directly into a named register without entering insert mode or performing a yank.
@q
A recursive macro is a macro that calls itself as its last step, causing it to loop automatically until an operation fails (such as reaching the end of the file
:let @/ = 'pattern'
Writing to the @/ register via :let @/ = 'pattern' sets Vim's last-search pattern directly — without performing a search or moving the cursor.
{count}@{register}
Prefix any macro execution with a count to repeat it that many times in a single command.
:let @a = "content"
When a recorded macro has a typo or needs a small tweak, you don't have to re-record it entirely.
"/
Vim stores the last search pattern in the special / register.
<C-a> (insert mode)
While in insert mode, pressing re-inserts the exact text you typed during your previous insert session.
"-
Vim silently stores every deletion of less than one line in the special "- register (the "small delete" register).
:let @q =
Instead of recording a macro with q, you can assign any string directly to a named register using :let @{register} = 'keys'.
:keeppatterns %s/old/new/g
The :keeppatterns modifier runs any Ex command without modifying Vim's last search pattern (stored in @/).
command-line #search #ex-commands #command-line #substitute #registers
@"
Vim macros are stored in registers — and you can execute any register as a macro with @{register}.
:t
The :t command (short for :copy) copies addressed lines to a destination line number, leaving the unnamed register untouched.
[p
When you copy code from one indentation level and paste it at another, p preserves the original indentation, leaving your code misaligned.
