AoC 2022 day 3

const fs = require('fs');
const eol = require('os').EOL;

const startTime = new Date().getTime();
let part1 = part2 = time = 0;
let input = fs.readFileSync(__dirname + "/data.txt", 'utf8').split(eol);

function getPrio(char) {
    let prio = char.charCodeAt();
    return char == char.toLowerCase() ? prio - 96 : prio - 64 + 26
}

part1 = input.map(val => {
    let temp = val.split("");
    return [temp.slice(0, temp.length / 2), temp.slice(temp.length / 2)];
}).map(val =>
    getPrio(val[0].filter((i) => val[1].includes(i))[0])
).reduce((a, b) => a + b)

for (let i = 0; i < input.length; i += 3) {
    let sacks = input.slice(i, i + 3).map((line) => line.split(""));
    for (let j = 1; j < sacks.length; j++) {
        unique = sacks[0].filter((char) => sacks[j].includes(char));
    }
    part2 += getPrio(unique[0]);
}

time = new Date().getTime() - startTime

console.log(`Part 1: ${part1}\nPart 2: ${part2}\nTimer: ${time} ms`);