Re: Adding String to Beginning of Lines

[Jean Louis]

* Christopher Dimech <dimech@gmx.com> [2020-11-10 16:41]:
> I now have got 'rec-cont', which lets me pass a string.
> How can I add a dafault  if I don't pass a regex in the
> mini-buffer.
> 
> (defun rec-cont (beg end regex)
>   (interactive "r\ns rec-cont regex: ")
>   (replace-regexp "^" regex nil beg end))
>   ;; (replace-regexp "^" ";; + " nil beg end))

Maybe (beg end &optional regex)

(let ((regex (or regex default))))

And if you need to read regexp: read-regexp