Re: Emacs: adding 1 to every number made of 2 digits inside a marked region.

[Emanuel Berg]

Hongyi Zhao wrote:

> Today, I stumbled on this interesting discussion [...]
>
> Imagine I've got the following in a text file opened under
> Emacs:
>
> some    34
> word    30
> another 38
> thing   59
> to      39
> say     10
> here    47
>
> and I want to turn into this, adding 1 [...]

When I was still classified as a human being I did something
similar and thanks to Emacs and that professional approach to
preparation that mini-expedition was concluded in
a semi-successful state since there were several survivors.

Here is the URL to the file but I also yank it last:

  https://dataswamp.org/~incal/TENT

tent                      2515
sleeping bag              1215
sleeping pad               880
Trangia                    619
comic book                 580
pillow                     450
science book               411
drybag                     305
thermos                    270
powerbank 8000mAh          245
water bottle               115
toothpaste                 110
piece of cloth (big)       100
knife                       90
sticky tape                 90
deodorant                   75
flashlight (3AAA)           73
piece of cloth (small)      60
flashlight (USB)            55
vaseline                    50
toothbrush                  15
skin lotion                 13
comb                        11
spoon/fork                   9
pill case                    9
------------------------------
                          8365g

(defun digits-sum ()
  (interactive)
  (save-excursion
    (goto-char (point-min))
    (let ((sum 0))
      (while (forward-word)
        (let ((number (number-at-point)))
          (when number
            (cl-incf sum number) )))
      (message "%s" sum) )))
(defalias 'di #'digits-sum)

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                  https://dataswamp.org/~incal/TENT

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