Solve 2023 day 2 part 1

2023/Day2/javascript/solve.js

@@ -0,0 +1,39 @@
+const fs = require("node:fs");
+
+const input = fs
+  .readFileSync("../input.txt", "utf8")
+  .split("\n")
+  .filter((line) => line !== "");
+
+const part1 = (lines) => {
+  const allowed = {
+    red: 12,
+    green: 13,
+    blue: 14,
+  };
+
+  games = lines.map((line) => {
+    const [game, results] = line.split(": ");
+    const [raw, id] = game.match(/Game (\d+)/);
+
+    const sets = results.split("; ");
+
+    const possibleSets = sets.map((set) => {
+      const colors = set.split(", ");
+      return !colors.some((c) => {
+        const [raw, amount, color] = c.match(/(\d+) ([a-z]*)/);
+        return Number.parseInt(amount, 10) > allowed[color];
+      });
+    });
+    return {
+      id: Number.parseInt(id, 10),
+      possible: possibleSets.every((set) => !!set),
+    };
+  });
+
+  return games
+    .filter(({ id, possible }) => (possible ? id : null))
+    .reduce((sum, { id }) => sum + id, 0);
+};
+
+console.log(part1(input));