Solve 2023 day 1 part 1

2023/Day1/javascript/solve.js

@@ -0,0 +1,17 @@
+const fs = require("node:fs");
+
+const input = fs
+  .readFileSync("../input.txt", "utf8")
+  .split("\n")
+  .filter((line) => line !== "");
+
+const isDigit = (x) => /\d/.test(x);
+
+const part1 = (lines) => {
+  const digits = lines.map((line) => line.split("").filter(isDigit));
+  return digits
+    .map((line) => Number.parseInt(line[0] + line[line.length - 1]), 10)
+    .reduce((acc, curr) => acc + curr, 0);
+};
+
+console.log(part1(input));