end of day 3

day03/js/day03a.js

@@ -0,0 +1,43 @@
+import { promises as fsp } from "node:fs";
+
+async function asyncReadFile(filename) {
+    try {
+        const contents = await fsp.readFile(filename, "utf-8");
+
+        return contents.trim();
+    } catch (err) {
+        console.error(err);
+    }
+}
+
+const findHighestOutput = (bank) => {
+    let arr = Array.from(bank);
+    let highest = 0;
+    arr.forEach((val, idx) => {
+        if (arr.length === idx + 1) return;
+        for (let i = idx + 1; i < arr.length; i++) {
+            const output = `${val}${arr[i]}` * 1;
+            if (output > highest) highest = output;
+        }
+    });
+    console.log(highest);
+    return highest;
+};
+
+/*
+const dataToParse = `987654321111111
+811111111111119
+234234234234278
+818181911112111`;
+*/
+
+const dataToParse = await asyncReadFile("../input.txt");
+
+const banks = dataToParse.split("\n");
+let total = 0;
+
+banks.forEach((bank) => {
+    total += findHighestOutput(bank);
+});
+
+console.log(`Total: ${total}`);