July 5, 2011
I had to work on a bunch of translation Java property files in an ancient J2EE project that had old translations in between the new ones resulting in a hardly readable mess that confused the hell out of Netbeans’ property file editor plugin, so I decided to just move all those old lines to the bottom of the file and comment them out.
For this I quickly hacked up two elisp functions
(defun move-line-to-end-of-file () "Move the current line to the end of the file." (interactive) (save-excursion (beginning-of-line) (kill-whole-line) (end-of-buffer) (yank-as-comment))) (defun yank-as-comment () "Yank the last killed selection as a comment, but leave text alone that is already a comment according to the current mode." (interactive) (save-excursion (yank) (if (not (comment-only-p (mark) (point))) (comment-region (mark) (point)))))
There probably is a much more idiomatic way to do this (which I’d love to hear about), but this seems to work just fine for my use. Note however that
move-line-to-end-of-file will just append to the last line if the file doesn’t end with a newline (which isn’t an issue in my case).