day 6 complete!

day06/js/day06a.js

@@ -0,0 +1,49 @@
+import { promises as fsPromises } from "node:fs";
+
+async function asyncReadFile(filename) {
+    try {
+        const contents = await fsPromises.readFile(filename, "utf-8");
+
+        const arr = contents.split(/\r?\n/);
+
+        return arr;
+    } catch (err) {
+        console.error(err);
+    }
+}
+
+/*
+const data = `
+123 328  51 64 
+ 45 64  387 23 
+  6 98  215 314
+*   +   *   +  
+`.trim()
+.split("\n");
+*/
+
+const data = await asyncReadFile("../input.txt");
+
+const parsedData = data.map((val) => val.trim().split(/\s+/));
+const rowCount = parsedData.length,
+    colCount = rowCount ? parsedData[0].length : 0;
+const numRegex = /\d+/;
+
+let total = 0;
+
+for (let c = 0; c < colCount; c++) {
+    let operands = [];
+    let result = 0;
+    for (let r = 0; r < rowCount; r++) {
+        const val = parsedData[r][c];
+        if (numRegex.test(val)) operands.push(val * 1);
+        else if (val === "+")
+            result = operands.reduce((acc, curr) => acc + curr, 0);
+        else if (val === "*")
+            result = operands.reduce((acc, curr) => acc * curr, 1);
+    }
+    console.log(`> result: ${result}`);
+    total += result;
+}
+
+console.log(`>> total: ${total}`);