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* Add a function to take the last element of a list.

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svn path=/nixpkgs/trunk/; revision=19179
This commit is contained in:
Nicolas Pierron 2010-01-03 11:05:42 +00:00
parent ab1eec6a60
commit d311b4e98f
1 changed files with 5 additions and 0 deletions
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5
pkgs/lib/lists.nix
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@ -167,4 +167,9 @@ rec {
if list == [] || count == 0 then [] if list == [] || count == 0 then []
else [ (head list) ] ++ take (builtins.sub count 1) (tail list); 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;
} }