From 7b7230b0e9529c3c26a8489fa2df11fe76618c47 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Tue, 6 Mar 2007 00:01:27 +0000
Subject: [PATCH] * Function concatLists to concatenate a list of lists.

svn path=/nixpkgs/trunk/; revision=8219
---
 pkgs/lib/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/lib/default.nix b/pkgs/lib/default.nix
index e0c96c2395b..08e71b66bce 100644
--- 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) "";