[Nix-dev] Basic string functions in nixops

[4levels]

Dear Nix Devs,

I'm currently looking (again) for the basic string functions.
Use case: I need to limit a parametric string's length to maximum 16
characters (indeed, MySql usernames cannot be longer than 16 characters).

Any hints in the right direction to substring a string in case it is longer
than 16 chars are greatly appreciated ;-)

Kind regards,

Erik aka 4levels
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