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Impl d1p2 in nix

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This commit is contained in:
Tyler Beckman 2024-12-11 19:02:45 -07:00
parent 3400e9db04
commit 3ad0212da4
Signed by: Ty
GPG key ID: 2813440C772555A4
2 changed files with 48 additions and 0 deletions
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46
day1/part2.nix Normal file
View file

@ -0,0 +1,46 @@
let
# Import nixpkgs lib and input file
inherit ((builtins.getFlake (builtins.toString ./..)).inputs.nixpkgs) lib;
input = builtins.readFile (builtins.toString ./input.txt);
# Do parsing
parsed = ( # Define function to sort lines into two lists
lib.lists.foldr
(cur: acc: {
first = acc.first ++ [(lib.strings.toIntBase10 (builtins.elemAt cur 0))];
second = acc.second ++ [(lib.strings.toIntBase10 (builtins.elemAt cur 1))];
})
{ first = []; second = []; }
) ( # Call with input split on newlines and 3 spaces; formatted like [ [ 1 2 ] [ 3 4 ] [ 5 6 ] ]
lib.lists.forEach
(lib.strings.splitString "\n" input)
(e: lib.strings.splitString " " e)
);
collapsed = (
lib.lists.foldr
(cur: acc:
acc // (
if (builtins.hasAttr "${builtins.toString cur}" acc)
then {
"${builtins.toString cur}" = acc."${builtins.toString cur}" + 1;
}
else {
"${builtins.toString cur}" = 1;
}
)
)
{}
) parsed.second;
output = (
lib.lists.foldr
(cur: acc:
acc + (
if (builtins.hasAttr "${builtins.toString cur}" collapsed)
then (cur * collapsed."${builtins.toString cur}")
else 0
)
)
0
) parsed.first;
in output

2
deno.lock
View file

@ -196,6 +196,8 @@
}
},
"remote": {
"https://deno.land/std@0.119.0/encoding/hex.ts": "5bc7df19af498c315cdaba69e2fce1b2aef5fc57344e8c21c08991aa8505a260",
"https://deno.land/std@0.119.0/hash/md5.ts": "957791b9052b40cfa211eeb755a76ad6ad12177387ba84b47c4bc8be4edd60c8",
"https://deno.land/x/sqlite@v3.9.1/build/sqlite.js": "2afc7875c7b9c85d89730c4a311ab3a304e5d1bf761fbadd8c07bbdf130f5f9b",
"https://deno.land/x/sqlite@v3.9.1/build/vfs.js": "7f7778a9fe499cd10738d6e43867340b50b67d3e39142b0065acd51a84cd2e03",
"https://deno.land/x/sqlite@v3.9.1/mod.ts": "e09fc79d8065fe222578114b109b1fd60077bff1bb75448532077f784f4d6a83",