Richard Stallman
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  • Telorand@reddthat.com
    421·
    27 days ago

    Because there’s non-programmers in this community, if you aren’t sure what this means but are too afraid to ask, it’s a Regular Expression that better represents the terms “Linux” and “Unix.”

    Though if we’re going to be that pedantic, it would be [nN][uiI][xX]$. That extra pipe wouldn’t actually do anything in the last example, because regexp picks one character from the set by default.

    And if we want to be really pedantic,

    (?!nix)[nN][uI][xX]$

    Would be the most accurate.

    Edit: based on comments, I think…

    (nux|NIX)$

    …would be the best. Then you don’t wind up with weird matches with things like UNiX.

    • thingsiplay@beehaw.org
      16·
      28 days ago

      Actually *nix isn’t a Regular Expression, because the star operator * requires a preceding character or object to apply to. This is a wildcard for the shell style globbing, where a single star doesn’t require a second object.

      • Telorand@reddthat.com
        7·
        28 days ago

        Yes, but you can really only do that with single characters, since your first example is an ordered group and the second is an unordered set in a capturing group. The equivalency drops off when you include more characters.

        Plus, you can do things like [a-zA-Z], and you can’t do that with the former example.

        I would imagine there’s a difference in computing overhead, too, but I have no idea which is more performant.

    • exu@feditown.comEnglish
      7·
      28 days ago

      *nix is more likely to be a glob, therefore an accurate version would be *n?x

      Edit: global -> glob dang autocorrect

    • jyoskykid@sh.itjust.works
      3·
      28 days ago

      All that effort, when you could’ve just called it LUNIX.

      By the way, does this expression match LUNIX? But if so, won’t it also match Binux or Bunix?

      • Telorand@reddthat.com
        3·
        28 days ago

        Yep, it would match LUNIX and Binux, but it would not match Bunix because of the negative lookahead.

  • xia@lemmy.sdf.orgEnglish
    3·
    27 days ago

    There’s a good idea and some real potential here, but it didn’t quite land for me.

  • maryjayjay@lemmy.world
    3·
    27 days ago

    Unix

    Minix

    AIX

    Irix

    HP/UX

    Ultrix

    OSF/1

    Linux

    Those are just the ones I remember because I’ve used them