AoC 2023 day 3

const fs = require("fs")
const { performance } = require("perf_hooks")
const os = require("os")

const startTime = performance.now()
let part1 = 0
let part2 = 0

const input = fs.readFileSync(__dirname + "/data.txt", "utf8").split(os.EOL)
const isNumberInRange = (number, min, max) => number >= min && number <= max

const numbersList = input.flatMap((item, y) => {
    let indexOffset = 0
    return item.match(/\d+/g).map((num) => {
        index = item.indexOf(num, indexOffset)
        indexOffset = index + num.length
        return { x: index, y, length: num.length, num: +num, used: false }
    })
})

input.forEach((item, y) => {
    ;[...item].forEach((char, x) => {
        let charList = []
        if (/[^0-9.]/.test(char)) {
            numbersList.filter((v) => {
                const valid =
                    isNumberInRange(x, v.x - 1, v.x + v.length) && isNumberInRange(v.y, y - 1, y + 1) && !v.used
                valid && (v.used = true)
                char == "*" && valid && charList.push(v.num)
                return valid
            })
        }
        if (charList.length == 2) {
            part2 += charList[0] * charList[1]
        }
    })
})

part1 = numbersList.reduce((sum, obj) => (obj.used ? sum + obj.num : sum), 0)
const time = performance.now() - startTime
console.log(`Part 1: ${part1}\nPart 2: ${part2}\nTimer: ${time} ms`)