19 lines
314 B
Nix
19 lines
314 B
Nix
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rec {
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fold = op: nul: list:
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if list == []
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then nul
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else op (builtins.head list) (fold op nul (builtins.tail list));
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concat =
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fold (x: y: x + y) "";
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flatten = x:
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if builtins.isList x
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then fold (x: y: (flatten x) ++ y) [] x
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else [x];
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sum = fold (x: y: builtins.add x y) 0;
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}
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