this post was submitted on 25 Nov 2023
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How to show what separates emacs from other IDEs (alien.top)
submitted 11 months ago by Both_Confidence_4147@alien.top to c/emacs@communick.news
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I talked to someone about the extensibility of emacs, but the person I was speaking to assumed that any IDE is just as extensible by using Plug Ins.

Without turning the conversation into a university style lecture, what is one or two simple actions I can do in emacs to show someone what separates it from other IDES.

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[–] ClerkOfCopmanhurst@alien.top 1 points 11 months ago (1 children)

It's the always-on REPL that's the kicker.

(defun invert-case ()
  (backward-delete-char-untabify 1)
  (insert (funcall (if (< last-command-event ?a)
		       #'downcase
		     #'upcase)
		   last-command-event)))

(add-hook 'post-self-insert-hook #'invert-case)

Then C-u C-M-x on invert-case to convey the larger point that emacs is always running within a gdb-like harness. Your buddy will immediately bristle at the prohibitive investment necessary to achieve this pointless and trivial hack, at which point he'll have truly grokked emacs.

[–] Asteridae@alien.top 1 points 11 months ago

Brilliant!