* Function concatLists to concatenate a list of lists.

svn path=/nixpkgs/trunk/; revision=8219
2007-03-06 00:01:27 +00:00
parent c212318239
commit 7b7230b0e9
1 changed files with 5 additions and 0 deletions
--- a/pkgs/lib/default.nix
+++ b/pkgs/lib/default.nix
@@ -19,6 +19,11 @@ rec {
    else op (head list) (fold op nul (tail list));

    
+  # Concatenate a list of lists.
+  concatLists =
+    fold (x: y: x ++ y) [];
+
+
  # Concatenate a list of strings.
  concatStrings =
    fold (x: y: x + y) "";