days edits

Author: Naomi Perez

days/day1.js

@@ -0,0 +1,63 @@
+/* ---------------------- Day 1: Sonar Sweep ------------------------ */
+const fs = require("fs");
+
+function countIncreasedMeasurements(measurements) {
+  let count = 0;
+
+  for (let i = 1; i < measurements.length; i++) {
+    if (measurements[i] > measurements[i - 1]) {
+      count++;
+    }
+  }
+
+  return count;
+}
+
+function countIncreasesSlidingWindow(measurements, windowSize) {
+  let count = 0,
+    currSum = 0n,
+    prevSum = 0n;
+
+  for (let i = 0; i < windowSize; i++) {
+    prevSum += BigInt(measurements[i]);
+  }
+
+  console.log(prevSum);
+  for (let i = windowSize; i < measurements.length; i++) {
+    // add next number to currSum and then subtract the first number from previous window
+    currSum = prevSum + BigInt(measurements[i]) - BigInt(measurements[i - windowSize]);
+
+    if (currSum > prevSum) {
+      count++;
+    }
+
+    prevSum = currSum;
+  }
+
+  return count;
+}
+
+function getInput(fileName) {
+  try {
+    const data = fs.readFileSync(fileName, "utf8");
+    return data;
+  } catch (err) {
+    console.error(err);
+  }
+}
+
+module.exports = {
+  dayOnePart1: () => {
+    const inputs = getInput("inputs/day1-inputs.txt");
+    let inputsArr = inputs.split("\n").map((element) => parseInt(element));
+
+    return countIncreasedMeasurements(inputsArr);
+  },
+
+  dayOnePart2: () => {
+    const inputs = getInput("inputs/day1-inputs.txt");
+    let inputsArr = inputs.split("\n").map((element) => parseInt(element));
+
+    return countIncreasesSlidingWindow(inputsArr, 3);
+  },
+};