aoc21_2.js

import { accessSync, promises as fs } from 'fs';

(async()=>{
    const input = await fs.readFile("./interpretertests/aoc_21_2_input.txt", 'utf8')

    const result = input.split('\n').reduce((acc, line) => {
        let [cmd, i] = line.split(' ')
        i = parseInt(i)

        switch(cmd) {
            case 'forward':
                acc.horz += i
                break
            case 'down': 
                acc.depth += i
                break
            case 'up':
                acc.depth -= i
                break
        }

        return acc
    }, {depth: 0, horz: 0})

    console.log(result.depth*result.horz)

    const result2 = input.split('\n').reduce((acc, line) => {
        let [cmd, i] = line.split(' ')
        i = parseInt(i)

        switch(cmd) {
            case 'forward':
                acc.horz += i
                acc.depth += acc.aim*i
                break
            case 'down': 
                acc.aim += i
                break
            case 'up':
                acc.aim -= i
                break
        }

        return acc
    }, {depth: 0, horz: 0, aim: 0})

    console.log(result2.depth*result2.horz)



})()