lispy.el demo 1: practice generating code

Intro

Comes from this emacs.stackexchange question.

Task summary

For LaTeX-mode, swap - to _, and swap 6 to ^.

Screencast

The screencast for this demo is here: https://www.youtube.com/watch?v=2w1h48CYOMo

Resulting code

(define-key LaTeX-mode-map "_" (lambda () (interactive) (insert "-")))
(define-key LaTeX-mode-map "-" (lambda () (interactive) (insert "_")))
(define-key LaTeX-mode-map "^" (lambda () (interactive) (insert "6")))
(define-key LaTeX-mode-map "6" (lambda () (interactive) (insert "^")))

How to generate this code:

step one

Write:

"-" "_"
"6" "^"

position the point at the start
C-7 to add one cursor
M-m to mark the first string
> to extend the region to the second string
c to clone region
i to select the first element of the region
s to move the region down
C-7 to cancel multiple-cursors.

You should now have:

"_" "-"
"-" "_"
"^" "6"
"6" "^"

step two

Write:

(define-key LaTeX-mode-map (lambda () (interactive) (insert)))

Kill it with C-, or C-k.

step three

position the point at the start
M-3 C-7 to add three cursors
C-y to paste the code from before
add one space
M-m mark
> grow
ok insert up
iw select first and move up
jj go down twice
okok insert up twice
C-7 to cancel multiple-cursors