This is a shorter example in Kotlin: https://rosettacode.org/wiki/Natural_sorting#Kotlin

Since there are is so many functionality of Guava and Apache Commons build into the kotlin stdlib I somehow refuse to believe this alpha numeric sort should not be part of it... Please tell me that I'm just blind.

depends on what platform you're on; for example, if you have ICU4J you can use

(Collator.getInstance() as RuleBasedCollator).apply { numericCollation = true }

for natural sorting you should use a locale-aware collator anyway, which is simply not cross-platform/stdlib

It may not be cross-plattform, yes, but in Windows Explorer and macOS Finder I see the same natural sorting I would expect anywhere. So it would have made sense to me that there is a place for that in a Kotlin lib

to implement it properly you need a CLDR or an equivalent database of per-locale rules, which needs to be updated with Unicode changes

Apache Commons Collections contains it

And Kotlin Collections compared to JDK standard has really a lot of it already contained

and on Linux it bundles the CLDR database, which then ends up out of sync with what's on the system… this is not a simple problem

So all these samples like https://rosettacode.org/wiki/Natural_sorting#Kotlin are defect because they miss out things?

Thanks.