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Comment by skulk | Hacker News Reader

This all works in evil-mode as well, and by default you get the cool live-preview (not sure how to enable that for the vanilla C-M-%)

    :%s/\([0-9]+\))/\,(1- \#1))/

will turn

    1) one
    2) two
    3) three

into

    0) one
    1) two
    2) three

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  :%s/\([0-9]\+\))/\=submatch(1)-1.')'    " vim

  perl -pe 's/([0-9]+)\)/$1-1 .")"/e'

  ruby -pe 'sub(/([0-9]+)\)/){"#{$1.to_i-1})"}'

What do you mean by live preview? My non-evil Emacs shows you the matches in the current buffer as you type. I don't think I did anything to enable it, but think it's a fairly recent thing (maybe Emacs 29).

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