50 lines
1.2 KiB
JavaScript
50 lines
1.2 KiB
JavaScript
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import fs from "fs";
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const REQUIRED_FIELDS = [
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"byr", // (Birth Year)
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"iyr", // (Issue Year)
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"eyr", // (Expiration Year)
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"hgt", // (Height)
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"hcl", // (Hair Color)
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"ecl", // (Eye Color)
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"pid", // (Passport ID)
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// "cid", // (Country ID) // Optional
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];
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/**
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* Main function for Puzzle A
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*
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* @param {string} data - Puzzle input as a single string.
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*/
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async function main(data) {
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const entries = data.split(/(?:\r?\n){2}/).map((raw) => raw.split(/\s+/g));
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/** @type {{[string]: number|string}[]} */
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let passports = [];
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for (const raw of entries) {
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let passport = {};
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raw
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.map((rawKV) => rawKV.split(":"))
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.forEach(([key, value]) => (passport[key] = value));
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passports.push(passport);
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}
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/** @type {{[string]: number|string}[]} */
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const valid_passports = [];
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for (const passport of passports) {
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if (
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REQUIRED_FIELDS.map((required) =>
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Object.keys(passport).includes(required)
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).reduce((prev, cur) => prev && cur, true)
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) {
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valid_passports.push(passport);
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}
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}
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return valid_passports.length;
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}
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fs.readFile("input", (err, data) => {
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if (err) throw err;
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main(data.toString()).then(console.log).catch(console.error);
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});
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