advent of code day 1

aoc_day01.ts

const input = await Deno.readTextFile("input.txt");
const data = input.split("\n");

let left: number[] = [];
let right: number[] = [];

for (const pair of data) {
  const [a, b] = pair.split("   ");
  left.push(+a);
  right.push(+b);
}

left = left.sort((a, b) => a - b);
right = right.sort((a, b) => a - b);

const dist = left.reduce((acc, val, idx) => {
  return acc + Math.abs(val - right[idx]) || acc;
}, 0);

console.log({ answer1: dist });

const dist2: number[] = [];

left.forEach((val) => {
  const contains = right.filter((v) => v === val);
  dist2.push(contains.length * val);
});

const total = dist2.reduce((acc, val) => acc + val || acc, 0);

console.log({ answer2: total });