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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.
We’re talking about Unix so being as pedantic as possible is actually required.
at that point we could just flip the switch for the case insensitive mode
But then you’d match terms like “liNuX” and “UniX,” and that’s just silly. 😆
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