27 lines
642 B
Nix
27 lines
642 B
Nix
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{input ? "", lib, ...}: let
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inherit (builtins) elemAt filter length;
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exampleIn = lib.readFile ./example.txt;
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mkSolution = {text}: let
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parts = text |> lib.trim |> lib.splitString "\n\n";
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towels = elemAt parts 0 |> lib.splitString ", ";
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regex = ''(${builtins.concatStringsSep "|" towels})+'';
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desired = elemAt parts 1 |> lib.splitString "\n";
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matches = desired |> map (lib.match regex);
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in {
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inherit towels regex desired matches;
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count = matches
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|> filter (m: !isNull m)
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|> length;
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};
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in {
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example = mkSolution {
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text = exampleIn;
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};
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real = mkSolution {
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text = input;
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};
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}
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