[benhoyt]

But length() is standard POSIX, no? Even length(array) has been approved by POSIX [1] but not yet included in the spec (they're very slow to update the spec for some reason). Both forms have been supported in onetrueawk, Gawk, mawk, and Busybox awk for a long time.

[1] https://www.austingroupbugs.net/view.php?id=1566

[ryenus]

Ah good to know, thank you! Meanwhile I found it, it was the awk from Debian 10 that lacked `length(array)`, see the related nvm pr [1].

[1]: https://github.com/nvm-sh/nvm/pull/2917/