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| author | Marc Weber <marco-oweber@gmx.de> | 2009-12-08 21:47:14 +0000 |
|---|---|---|
| committer | Marc Weber <marco-oweber@gmx.de> | 2009-12-08 21:47:14 +0000 |
| commit | 7ef915ebc88f7784cdec5a9917818cbdfe1a76c4 (patch) | |
| tree | 9f6d92bd9b8d7e9ed1810443038c3a548ae186a1 /pkgs/lib/lists.nix | |
| parent | 89b59e3fbcf1cce419e9badfdb885484b429953a (diff) | |
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nixpkgs lib: adding haskell's take
svn path=/nixpkgs/trunk/; revision=18848
Diffstat (limited to 'pkgs/lib/lists.nix')
| -rw-r--r-- | pkgs/lib/lists.nix | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/pkgs/lib/lists.nix b/pkgs/lib/lists.nix index 3a5ed2628de..4359662da27 100644 --- a/pkgs/lib/lists.nix +++ b/pkgs/lib/lists.nix @@ -161,4 +161,10 @@ rec { in qs list []; + + # haskell's take: take 2 [1 2 3 4] yields [1 2] + take = count: list: + if list == [] || count == 0 then [] + else [ (head list) ] ++ take (builtins.sub count 1) (tail list); + } |