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Refactorings and removing hard-coded assumptions

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svn path=/nixpkgs/trunk/; revision=12668
This commit is contained in:
Michael Raskin 2008-08-20 11:20:32 +00:00
parent a921f752b8
commit d7acaeb096
1 changed files with 6 additions and 5 deletions
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11
pkgs/lib/default.nix
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@ -32,20 +32,21 @@ rec {
else (innerComposedArgs f (y x))));
composedArgs = f: innerComposedArgs f {};
defaultMerge = x : y: if builtins.isAttrs y then
x // y
defaultMergeArg = x : y: if builtins.isAttrs y then
y
else
y x;
(y x);
defaultMerge = x: y: x // (defaultMergeArg x y);
sumTwoArgs = f: x: y:
f (defaultMerge x y);
foldArgs = merger: f: init: x:
let arg=(merger init (defaultMerge init x)); in
let arg=(merger init (defaultMergeArg init x)); in
(f arg) // {
meta = {
function = foldArgs merger f arg;
};
};
composedArgsAndFun = f: foldArgs (x: y: y) f {};
composedArgsAndFun = f: foldArgs defaultMerge f {};
# example a = pairMap (x : y : x + y) ["a" "b" "c" "d"];
# result: ["ab" "cd"]