「🎉」 init(2025): day 1

2024/day03/.envrc

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+use flake

2024/day03/flake.lock

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+{
+  "nodes": {
+    "nixpkgs": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1733016324,
+        "narHash": "sha256-8qwPSE2g1othR1u4uP86NXxm6i7E9nHPyJX3m3lx7Q4=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "7e1ca67996afd8233d9033edd26e442836cc2ad6",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-24.05",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

2024/day03/flake.nix

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+{
+  description = "a minimal test development environment for ruby";
+
+  inputs = {
+
+    nixpkgs = {
+      url = "nixpkgs/nixos-24.05";
+      flake = false;
+	};
+
+  };
+
+  outputs = inputs@{ nixpkgs, ... }:
+	{
+    devShell = {
+      x86_64-linux = let
+        pkgs = import nixpkgs { system = "x86_64-linux"; };
+	  in pkgs.mkShell {
+        packages = with pkgs; [
+          gcc ruby
+        ];
+        shellHook = ''
+          export CC=gcc
+          echo -e "\x1B[0;33mentering ruby minimalist test development environment...\x1B[0m"
+        '';
+      };
+    };
+  };
+}

2024/day03/part1.rb

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+if File.exists?("input.txt")
+  file = File.open("input.txt")
+  file_data = file.read
+  file.close
+else
+  file_data = "xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))"
+end
+
+#puts file_data
+sane_data = file_data.scan(/mul\(\d+,\d+\)/)
+#puts sane_data.inspect
+
+numbers = sane_data.map do |item|
+  item.scan(/\d+/).map(&:to_i)
+end
+#puts numbers.inspect
+
+result = 0
+
+for mul in numbers do
+  result = result + mul[0] * mul[1]
+end
+
+puts result

2024/day03/part2.rb

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+if File.exists?("input.txt")
+  file = File.open("input.txt")
+  file_data = file.read
+  file.close
+else
+  file_data = "xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))"
+end
+
+#puts file_data
+sane_data = file_data.gsub(/don\'t\(\).*?do\(\)/m, "").scan(/mul\(\d+,\d+\)/)
+#puts sane_data.inspect
+
+numbers = sane_data.map do |item|
+  item.scan(/\d+/).map(&:to_i)
+end
+#puts numbers.inspect
+
+result = 0
+
+for mul in numbers do
+  result = result + mul[0] * mul[1]
+end
+
+puts result