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Add 2020 day 4

master
Alice Gaudon 8 months ago
parent
commit
91ec1be623
  1. 60
      2020/day4/day4.js

60
2020/day4/day4.js

@ -0,0 +1,60 @@
#!/bin/node
const fs = require('fs');
fs.readFile('input.txt', (err, data) => {
const passports = [];
data.toString()
.split('\n\n')
.map(line => line.replaceAll('\n', ' '))
.map((line, index) => line.split(' ').map(f => {
if (!passports[index]) passports[index] = {};
const [key, value] = f.split(':');
passports[index][key] = value;
}));
const requiredFields = [
['byr', v => {
const number = Number(v);
return v.length === 4 && number >= 1920 && number <= 2002;
}],
['iyr', v => {
const number = Number(v);
return v.length === 4 && number >= 2010 && number <= 2020;
}],
['eyr', v => {
const number = Number(v);
return v.length === 4 && number >= 2020 && number <= 2030;
}],
['hgt', v => {
const n = Number(v.substring(0, v.length - 2));
if (v.endsWith('cm')) return n >= 150 && n <= 193;
else if (v.endsWith('in')) return n >= 59 && n <= 76;
else return false;
}],
['hcl', v => /^#[0-9a-f]{6}$/.test(v)],
['ecl', v => /^(amb|blu|brn|gry|grn|hzl|oth)$/.test(v)],
['pid', v => /^[0-9]{9}$/.test(v)],
];
let q1 = 0, q2 = 0;
for (const passport of passports) {
console.log(passport);
let q1Fields = 0, q2Fields = 0;
for (const [fieldName, validator] of requiredFields) {
if (Object.keys(passport).indexOf(fieldName) >= 0) {
q1Fields++;
if (validator(passport[fieldName])) q2Fields++;
console.log('>', fieldName, passport[fieldName], validator(passport[fieldName]));
}
}
console.log('>', q1Fields + '/' + requiredFields.length, q2Fields + '/' + requiredFields.length);
if (q1Fields === requiredFields.length) q1++;
if (q2Fields === requiredFields.length) q2++;
}
console.log(q1 + '/' + passports.length, q2 + '/' + passports.length);
});
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