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What should I type in replace-regexp command to change the first list below into the second? I'd like to repeat each number at the beginning of line. To achieve that, I assume that I'll have to refer to each regexp match when I type what I'd like to replace each of them with, but how can I do that?

* apple
12
* banana
5
* grape
5
* watermelon
3



* apple
12 12
* banana
5 5
* grape
5 5
* watermelon
3 3
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  • I found the answer here, but my question's title seems really different than the one in the link. Should I close this as a duplicate? stackoverflow.com/questions/2003774/…
    – stacko
    Jun 22, 2016 at 9:40
  • 1
    No. Only duplicates of other questions on the same site are closed. It's OK for duplicates to exist on different sites. The question you cite is on StackOverflow.
    – Drew
    Jun 22, 2016 at 16:32

1 Answer 1

Reset to default
1

Replace (i.e. M-x query-replace-regexp)

^\([[:digit:]]+\)

with

\1 \1

viola. You can look up this decent reference.

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