A few things for which I switch to Emacs, even when using DrRacket:
* M-q to re-flow Racket comments that span multiple lines, to fill to
some margin (like 79 or 80 columns). Note that Emacs has fancy
"adaptive-fill", but something simple and Racket-comment-specific would
be fine.
* M-x quack-tidy RET to reindent all lines and tidy up extraneous
whitespace. Using the pretty-printer, DrRacket could go a step further,
to line-breaking.
* Keyboard macros. These can get pretty powerful. Matthias's
argument-reordering would be a simple example, and even for that,
keyboard macros using sexp movement operations would be more robust than
rectangle kill&yank.
* Working with (editing, viewing, or doing keyboard macros with) more
than 2 or 3 files at once.
* Doing version control operations.
* Editing non-Racket/Scheme text files.
The first two have been on my mental list to add to DrRacket someday.
But if any students are bored over winter break... :)
--
http://www.neilvandyke.org/
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