first commit

day01/js/day01a.js

@@ -0,0 +1,88 @@
+import { promises as fsPromises } from "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);
+    }
+}
+
+// dial 0-99
+
+const DIAL_START = 50;
+
+const Dial = (start = DIAL_START) => {
+    let countZero = 0,
+        current = start;
+    const getCountZero = () => countZero,
+        reset = () => {
+            countZero = 0;
+            current = start;
+        },
+        rotate = (initialVal = "") => {
+            const val = initialVal.trim(),
+                dir = val.length ? val.substring(0, 1).toUpperCase() : "",
+                amount = val.length ? (val.substring(1) * 1) % 100 : 0;
+
+            if (!dir) {
+                console.log(`${val} => invalid value!`);
+            }
+
+            const initial = current;
+
+            if (dir === "R") {
+                current = (current + amount) % 100;
+            } else if (dir === "L") {
+                current =
+                    (current - amount + (current - amount < 0 ? 100 : 0)) % 100;
+            }
+            console.log(
+                `${val} => rotating ${
+                    dir === "R" ? "RIGHT" : "LEFT"
+                } ${amount} from ${initial} to ${current}`
+            );
+
+            if (current === 0) {
+                countZero++;
+                console.log("CountZero!");
+            }
+        };
+
+    return {
+        getCountZero,
+        reset,
+        rotate,
+    };
+};
+
+const dial = Dial();
+
+/*
+// Test Data
+
+const dataToParse = [
+  "L68",
+  "L30",
+  "R48",
+  "L5",
+  "R60",
+  "L55",
+  "L1",
+  "L99",
+  "R14",
+  "L82",
+];
+*/
+
+const dataToParse = await asyncReadFile("../input.txt");
+
+dataToParse.forEach((val) => {
+    if (val.trim()) dial.rotate(val);
+});
+
+console.log(`Final countZero is ${dial.getCountZero()}`);

day01/js/day01b.js

@@ -0,0 +1,103 @@
+import { readFileSync, promises as fsPromises } from "fs";
+
+async function asyncReadFile(filename) {
+    try {
+        const contents = await fsPromises.readFile(filename, "utf-8");
+
+        const arr = contents.split(/\r?\n/);
+
+        // console.log(arr); // 👉️ ['One', 'Two', 'Three', 'Four']
+
+        return arr;
+    } catch (err) {
+        console.error(err);
+    }
+}
+
+// dial 0-99
+
+const DIAL_START = 50;
+
+const Dial = (start = DIAL_START) => {
+    let countZero = 0,
+        current = start;
+    const getCountZero = () => countZero,
+        reset = () => {
+            countZero = 0;
+            current = start;
+        },
+        rotate = (initialVal = "") => {
+            const val = initialVal.trim(),
+                dir = val.length ? val.substring(0, 1).toUpperCase() : "",
+                originalAmount = val.length ? val.substring(1) * 1 : 0,
+                amount = originalAmount % 100,
+                hundreds = Math.floor(originalAmount / 100);
+
+            if (!dir) {
+                console.log(`${val} => invalid value!`);
+            }
+
+            const initial = current;
+
+            if (hundreds) {
+                countZero += hundreds;
+                console.log(`${val} => has hundreds: ${hundreds} x CountZero!`);
+            }
+
+            if (dir === "R") {
+                if (current + amount > 100) {
+                    countZero++;
+                    console.log(`${val} => passing 0: CountZero!`);
+                }
+                current = (current + amount) % 100;
+            } else if (dir === "L") {
+                if (current && current - amount < 0) {
+                    countZero++;
+                    console.log(`${val} => passing 0: CountZero!`);
+                }
+                current = (100 + current - amount) % 100;
+            }
+            console.log(
+                `${val} => rotating ${
+                    dir === "R" ? "RIGHT" : "LEFT"
+                } ${amount} from ${initial} to ${current}`
+            );
+
+            if (current === 0) {
+                countZero++;
+                console.log("CountZero!");
+            }
+        };
+
+    return {
+        getCountZero,
+        reset,
+        rotate,
+    };
+};
+
+const dial = Dial();
+
+// Test Data
+/*
+const dataToParse = [
+  "L68",
+  "L30",
+  "R48",
+  "L5",
+  "R60",
+  "L55",
+  "L1",
+  "L99",
+  "R14",
+  "L82",
+];
+*/
+
+const dataToParse = await asyncReadFile("../input.txt");
+
+dataToParse.forEach((val) => {
+    if (val.trim()) dial.rotate(val);
+});
+
+console.log(`Final countZero is ${dial.getCountZero()}`);