Xah Talk Show 2025-07-08 Ep676 Perl Find Replace, Format Perl Code, and in Emacs

• https://youtu.be/UYBW8t8pE7k

• demo perl find replace script
• mention others for golang, python, emacs lisp, Wolfram language
• demo perl format code
• perltidy -b xah_find_replace.pl
• write a emacs wrapper
• show others for css python JavaScript html golang PowerShell, etc
• Xah Talk Show 2025-07-03 Ep673 Format Python JavaScript Golang HTML CSS in Emacs, Wolfram Language Auto Format

• Python: Format Code

• Perl: Find Replace Text in Directory 📜

(defun xah-perl-format-buffer ()
  "Reformat current file by calling perltidy.
Buffer is saved first.

Created: 2025-07-08
Version: 2025-07-08"
  (interactive)
  (when (not (buffer-file-name)) (user-error "buffer %s is not a file." (buffer-name)))
  (when (buffer-modified-p) (save-buffer))
  (let ((xoutbuf (get-buffer-create "*xah-perl-format output*")))
    (with-current-buffer xoutbuf (erase-buffer))
    (call-process "perltidy" nil xoutbuf nil "-b" buffer-file-name)
    (revert-buffer t t t)))