• mogoh@lemmy.ml
    421·
    3 months ago

    Which one of these commands is correct?

    A: sed -E 's/\b(\w+)\b/echo \1 | rev/g' file.txt
    B: sed 's/\b\w+\b/echo & | rev/ge' file.txt
    C: sed -E 's/(\w+)/$(echo \1 | rev)/g' file.txt
    D: sed 's/\([a-zA-Z]\+\)/\n&\n/g; s/\n\(.*\)\n/\3\2\1/g; s/\n//g' file.txt

    Chatty was so kind to transcribe. May contain errors.

    • mogoh@lemmy.ml
      291·
      3 months ago

      Chatty claims the correct answer to be:

      Spoiler

      B

      I tried it my self and I conclude:

      Spoiler

      none is correct.

      • UltraBlack@lemmy.world
        111·
        3 months ago

        Thought so lol

        A: didn’t even try what by does B: Single quotes prevent execution C: there is no way to execute commands afaik so this won’t work either D: that syntax is just wrong afaik