11 lines
341 B
Nix
11 lines
341 B
Nix
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with import <nixpkgs> { };
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let
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list = [["a"] ["b"] ["c"]];
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attrList = [{a = 1;} {b = 0;} {a = 2;}];
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catAttrs = atr: l: lib.fold (val: _l: if (builtins.hasAttr atr val) then [ (val.${atr}) ] ++ _l else _l) [] l;
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in
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rec {
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example = builtins.concatLists list; #is [ "a" "b" "c" ]
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result = catAttrs "a" attrList; #should be [1 2]
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}
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