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Add two 'remove' functions

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svn path=/nixpkgs/branches/stdenv-updates/; revision=26311
This commit is contained in:
Yury G. Kudryashov 2011-03-15 09:24:47 +00:00
parent f227549863
commit 3e71355377
1 changed files with 5 additions and 0 deletions
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5
pkgs/lib/lists.nix
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@ -50,6 +50,11 @@ rec {
filter = pred: list:
fold (x: y: if pred x then [x] ++ y else y) [] list;
# Remove elements 'e' from a list. Useful for buildInputs
remove = e: filter (x: x != e);
# Given two lists, removes all elements of the first list from the second list
removeList = l: filter (x: elem x l);
# Return true if `list' has an element `x':
elem = x: list: fold (a: bs: x == a || bs) false list;