AdventOfCode-js-2024/3/3_2.js

import { loadInput } from "../common.js";

// const input = loadInput("./3/test_2.input", parseInput, true);
const input = loadInput(3, parseInput);

solve(input);

/**
 * @param {string} memDump
 */
function parseInput(memDump) {
    return Array.from(memDump.matchAll(/(?:(do(?:n't)?\(\))|(mul\(\d{1,3},\d{1,3}\)))/g));
}

function solve(validInstructions) {
    let sum = 0;
    let enabled = true;
    for(const match of validInstructions) {
        const instruction = match[0];

        if (instruction == "do()") { enabled = true; continue; }
        else if (instruction == "don't()") { enabled = false; continue; }

        if (enabled) {
            sum += eval(instruction);
        }
    }

    console.log("Sum of result of valid instructions:", sum);
}

function mul(a,b) { return a*b; }