head
builtins.head
Primop
Docs pulled from | This Revision | 16 minutes ago
Takes 1 arguments
list
Return the first element of a list; abort evaluation if the argument
isn’t a list or is an empty list. You can test whether a list is
empty by comparing it with [].
This function is not defined in a .nix file. It is likely a builtins function or an alias of a builtins function. builtins functions are predefined functions provided by Nix.