From d311b4e98f37f9e3d52c837077e99ad5b4cce4bc Mon Sep 17 00:00:00 2001 From: Nicolas Pierron Date: Sun, 3 Jan 2010 11:05:42 +0000 Subject: [PATCH] * Add a function to take the last element of a list. svn path=/nixpkgs/trunk/; revision=19179 --- pkgs/lib/lists.nix | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/pkgs/lib/lists.nix b/pkgs/lib/lists.nix index 4359662da27..6141ad413d3 100644 --- a/pkgs/lib/lists.nix +++ b/pkgs/lib/lists.nix @@ -167,4 +167,9 @@ rec { if list == [] || count == 0 then [] else [ (head list) ] ++ take (builtins.sub count 1) (tail list); + last = list: + assert list != []; + let loop = l: if tail l == [] then head l else loop (tail l); in + loop list; + }