* Function optionals.

svn path=/nixpkgs/trunk/; revision=10553
2008-02-08 11:48:06 +00:00 · 2008-02-08 11:48:06 +00:00 · 48f544d2e3
parent 248004a624
commit 48f544d2e3
1 changed files with 4 additions and 0 deletions
--- a/pkgs/lib/default.nix
+++ b/pkgs/lib/default.nix
@ -180,6 +180,10 @@ rec {
  # (e.g. `++ optional (system == "i686-linux") flashplayer').
  optional = cond: elem: if cond then [elem] else [];

+  
+  # Return a list or an empty list, dependening on a boolean value.
+  optionals = cond: elems: if cond then elems else [];
+  

  # Return a list of integers from `first' up to and including `last'.
  range = first: last: