'Mouse copy' is neat way of editing sexps, based on a design from Lisp Machines: https://www.mail-archive.com/gnu-emacs-sources@gnu.org/msg00393.html
This lets you copy the sexp under your mouse cursor and paste it at point. Saves a few precious keystrokes!
Full implementation here: https://github.com/vsedach/mouse-copy
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I'm experimenting with live-evaluating tests in my programming language project.
It's relatively fiddly to hook up a UI for this, but it saves a precious keystroke to run the tests! I'm hoping that it results in more, better tests due to the convenience.
Trying to let my 3yo try as many different technology interfaces as possible.
Mouse: not too bad, especially after reducing sensitivity.
Keyboard: WASD is easy to lose track of in a sea of buttons.
Controller: requires both hands together, which is tricky. Arguably the left hand is more important too, hard for a right hander.
I've been experimenting with an 'evaluate up to cursor' mode for my PL project.
I love evaluating self-contained snippets in Lisp, this generalises the idea.
The interpreter remembers the arguments when you run tests, then can re-use them when you say 'eval up to here'.
What do you think?