feat(js): add solutions for 2023 day 4

js/src/2023/04/index.js

@@ -0,0 +1,41 @@
+/* eslint-disable no-cond-assign, no-loop-func */
+
+import { cast, solution } from '../../utils';
+
+const parse = (input) => (
+  input.trim().split('\n').map((line) => {
+    const [first, second] = line.split('|');
+    const [id, ...winningNrs] = first.match(/\d+/g).map(cast);
+    const nrs = second.match(/\d+/g).map(cast);
+    return { id, winningNrs, nrs };
+  })
+);
+
+export const partOne = solution((input) => {
+  const cards = parse(input);
+  let score = 0;
+  for (const card of cards) {
+    const winners = card.nrs.filter((have) => card.winningNrs.includes(have));
+    if (winners.length) {
+      score += 2 ** (winners.length - 1);
+    }
+  }
+  return score;
+});
+
+export const partTwo = solution((input) => {
+  const cards = parse(input);
+
+  const pile = [...cards];
+  let card;
+  let amount = 0;
+  while (card = pile.pop()) {
+    ++amount;
+    const winners = card.nrs.filter((have) => card.winningNrs.includes(have));
+    if (winners.length) {
+      const rewards = cards.slice(card.id, card.id + winners.length);
+      pile.push(...rewards);
+    }
+  }
+  return amount;
+});

puzzles/2023/04/examples.yaml

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+part-one:
+  - input: &example1 |
+      Card 1: 41 48 83 86 17 | 83 86  6 31 17  9 48 53
+      Card 2: 13 32 20 16 61 | 61 30 68 82 17 32 24 19
+      Card 3:  1 21 53 59 44 | 69 82 63 72 16 21 14  1
+      Card 4: 41 92 73 84 69 | 59 84 76 51 58  5 54 83
+      Card 5: 87 83 26 28 32 | 88 30 70 12 93 22 82 36
+      Card 6: 31 18 13 56 72 | 74 77 10 23 35 67 36 11
+    answer: 13
+
+part-two:
+  - input: *example1
+    answer: 30