Emacs Key Macro Example: Eval Emacs Lisp Repeatedly

Here's another example of Emacs: Keyboard Macro use.

I have a function insert-random-uuid [see Emacs Lisp: Insert Random UUID 🚀] I want to call it hundreds of times to see its output. Let's just say i want to call the elisp expression (random 100) one hundred times.

One way is to write a elisp command on the spot, like this:

(defun xx-random-test ()
  "test"
  (interactive)
  (dotimes (ii 100) (insert (format "%d " (random 100))))
  )

But that takes 5 minutes to write, plus you need to have elisp knowledge. You can use a kmacro to do this fast, with the following steps.

1. Start kmacro Ctrl + x (.
2. Type Ctrl + u, then Alt + x eval-expression, with this expression (random 100). The Ctrl + u will make eval-expression insert its result in current buffer.
3. Type a space.
4. End kmacro Ctrl + x ).
5. Type Ctrl + u 100 then call kmacro-end-and-call-macro 【Ctrl + x e】.

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