day 1

src/day01/README.md

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+# 🎄 Advent of Code 2024 - day 1 🎄
+
+## Info
+
+Task description: [link](https://adventofcode.com/2024/day/1)
+
+## Notes
+
+...

src/day01/index.ts

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+import run from "aocrunner"
+
+const parseInput = (rawInput: string) => {
+  const rows = rawInput.split('\n').map(line => line.split(/\s+/).map(Number))
+  let lists: number[][] = [[], []]
+  rows.forEach(row => {
+    row.forEach((value, index) => lists[index].push(value))
+  })
+  return lists
+}
+
+const part1 = (rawInput: string) => {
+  const input = parseInput(rawInput)
+  input.forEach(list => list.sort())
+  let total = 0
+  for (let i = 0; i < input[0].length; i++) {
+    total += Math.abs(input[0][i] - input[1][i])
+  }
+  return total
+}
+
+const part2 = (rawInput: string) => {
+  const [left, right] = parseInput(rawInput)
+  right.sort()
+  const counts = new Map<number, number>()
+  right.forEach(entry => {
+    counts.set(entry, (counts.get(entry) ?? 0) + 1)
+  })
+  const total = left.reduce((acc, cur) => { return acc + cur * (counts.get(cur) ?? 0)}, 0)
+  return total
+}
+
+run({
+  part1: {
+    tests: [
+      {
+        input: `3   4
+4   3
+2   5
+1   3
+3   9
+3   3`,
+        expected: 11,
+      },
+    ],
+    solution: part1,
+  },
+  part2: {
+    tests: [
+      {
+        input: `3   4
+4   3
+2   5
+1   3
+3   9
+3   3`,
+        expected: 31,
+      },
+    ],
+    solution: part2,
+  },
+  trimTestInputs: true,
+  onlyTests: false,
+})