I usually check .nix files in " https://github.com/NixOS/nixpkgs/tree/master/lib"; folder when searching for basic functions. String manipulation functions are in "strings.nix".
On your case, this should work: nix-repl> with (import <nixpkgs/lib>); concatStrings (take 16 (stringToCharacters "0123456789abcdefghijklmnop")) "0123456789abcdef" On Mon, 25 Jan 2016 at 18:16 4levels <[email protected]> wrote: > 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 > _______________________________________________ > nix-dev mailing list > [email protected] > http://lists.science.uu.nl/mailman/listinfo/nix-dev >
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