Day 4 refactor

staceyfenton · staceyfenton · commit 3518a8b7c4e2 · 2023-12-04T13:58:07.000Z
diff --git a/2023/Day04/index.js b/2023/Day04/index.js
@@ -1,7 +1,5 @@
 import input from './input.js';
 
-const cards = input.split('\n');
-
 // Process cards to get winning numbers and my numbers
 const cleanedCardData = cards.map(card => {
   const [, cardData] = card.split(': ');
@@ -12,8 +10,12 @@ const cleanedCardData = cards.map(card => {
 // Calculate total points based on matching numbers
 let totalPoints = 0;
 
+const getMatchingNumbers = (winningNumbers, myNumbers) => {
+  return myNumbers.split(' ').filter(number => winningNumbers.split(' ').includes(number));
+}
+
 cleanedCardData.forEach(({ winningNumbers, myNumbers }) => {
-  const matchingNumbers = myNumbers.split(' ').filter(number => winningNumbers.split(' ').includes(number));
+  const matchingNumbers = getMatchingNumbers(winningNumbers, myNumbers);
 
   if (matchingNumbers.length > 0) {
     const points = Math.pow(2, matchingNumbers.length - 1);
@@ -23,17 +25,13 @@ cleanedCardData.forEach(({ winningNumbers, myNumbers }) => {
 
 console.log(`Total points: ${totalPoints}`);
 
-/* ----- Part Two ----- */ 
+/* Part Two */ 
 
 let amountOfCardsArray = Array(cards.length).fill(1);
 
 for (let i = 0; i < cards.length; i++) {
   const { winningNumbers, myNumbers } = cleanedCardData[i];
-  
-  const winningNumbersSet = new Set(winningNumbers.split(' '));
-  const myNumbersSet = new Set(myNumbers.split(' '));
-  
-  const numberOfMatches = [...myNumbersSet].filter(num => winningNumbersSet.has(num)).length;
+  const numberOfMatches = getMatchingNumbers(winningNumbers, myNumbers).length
 
   for (let x = 1; x <= numberOfMatches; x++) {
     amountOfCardsArray[i + x] += amountOfCardsArray[i];
