this post was submitted on 23 Feb 2026
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Looking for Complex Text Manipulation CLI tools (programming.dev)
submitted 2 days ago* (last edited 2 days ago) by cactus_head@programming.dev to c/linux@lemmy.ml
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I have a program that require all keywords to be in a single paragraph, most of the time, separated by commas

For example:

I have those terms

1-Term
1.1-Term
2-Term
3-Term
4-Term

That i collected and organized into groups and subgroups with Titles and subtitles

Title

  • 1-Term

  • 1.1-Term

  • 2-Term

    • Sub-Title
      • 3-Term
      • 4-Term

But then i want to turn them into:

1-Term, 1.1-Term, 2-Term, 3-Term, 4-Term

Removing certain marked words(Titles and sub-Titles), any Empty/Blank space, and Line breaks, while adding the commas between The Terms. I want to keep certain dashes "-"(like in words )

1-Term,1.1 -Term,2-Term,3-Term,4-Term

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[–] bus_factor@lemmy.world 1 points 1 day ago

If you're feeling a little old school (and some might say masochistic), you could so a similar crude parser with a perl oneliner. This would be more efficient compute wise, but it's a bit of an acquired taste readability wise:

$ perl -ne 'chomp; push @a, $1 if /^\s*-\s*(.*[^:\s])\s*$/; END{print join(",", @a), "\n"}' /tmp/foo.txt
Harry potter,Perfect Blue,Jurassic world,Jurassic Park,Jedi,Star wars,The clone wars,MCU,Gumball,Flapjack,Steven Universe,Stars vs. the forces of Evil,Wordgril,Flapjack

Here perl -n makes perl look at each line individually, chomp strips off the trailing newline, we match for /^\s*-\s*(.*[^:\s])\s*$/ (a string starting with a dash and ending with something not a colon) and append the content of the matching parenthesis to an implicitly declared array @a. Then we add an END{} block which will be executed after all lines are parsed, where we print the array joined on ,.