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https://github.com/NixOS/nixpkgs.git
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599015e8b0
mess. Also cleaned up some functions:
- foldl appeared broken (it recursively called fold).
- Renamed logicalAND/logicalOR to and/or.
- Removed listOfListsToAttrs, eqStrings: obsolete.
- Removed isInList, which does the same thing as elem.
- stringToCharacters: don't return a "" at the end of the list.
- Renamed concatList to concat, as concatList (singular) is a
misnomer: it takes two lists. Likewise, renamed mergeAttr to
mergeAttrs.
misc.nix still contains a lot of stuff that should be refactored and
moved to other files.
svn path=/nixpkgs/trunk/; revision=14013
22 lines
648 B
Nix
22 lines
648 B
Nix
# Operations on attribute sets.
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with { inherit (builtins) head tail; };
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rec {
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inherit (builtins) attrNames listToAttrs hasAttr isAttrs;
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# Return an attribute from nested attribute sets. For instance ["x"
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# "y"] applied to some set e returns e.x.y, if it exists. The
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# default value is returned otherwise. !!! there is also
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# builtins.getAttr (is there a better name for this function?)
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getAttr = attrPath: default: e:
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let attr = head attrPath;
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in
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if attrPath == [] then e
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else if builtins ? hasAttr && hasAttr attr e
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then getAttr (tail attrPath) default (builtins.getAttr attr e)
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else default;
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} |