still pretty schlopy day 2 advent

advent2021_day_2.js

const data = require('./data.json');

const results = data.data.reduce((acc, val, idx, arr) => {
  const [direction, rawValue] = val.split(' ');
  const value = Number(rawValue);

  switch (direction) {
    case 'up':
      acc.aim -= value;
      break;
    case 'down':
      acc.aim += value;
      break;
    case 'forward':
      acc.horizontalPosition += value;
      acc.depth += (acc.aim * value);
      break;
    default:
      break;
  }

  return acc;
}, {
  horizontalPosition: 0,
  depth: 0,
  aim: 0,
})

console.log(results.horizontalPosition * results.depth);