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d3p2

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Nathan van Ofwegen
2022-12-04 15:32:49 +00:00
parent 9574f3b126
commit d68ac87ca9
1 changed files with 19 additions and 9 deletions
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28
src/2022/day3/index.ts
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@@ -3,18 +3,28 @@ import { readFile, sum } from "../../utils";
let input = readFile(path.resolve(__dirname, 'input.txt')); let input = readFile(path.resolve(__dirname, 'input.txt'));
const day1 = input.split("\n").map(line => { const day1 = input.split("\n")
const first = line.substring(0, line.length / 2).split('') .map(line => {
const second = line.substring(line.length / 2).split('') const first = line.substring(0, line.length / 2).split('')
const second = line.substring(line.length / 2).split('')
const both = first.filter(ch => second.includes(ch))[0]; const both = first.filter(ch => second.includes(ch))[0];
const ascii = both.charCodeAt(0); const ascii = both.charCodeAt(0);
return ascii > 96 ? ascii - 96 : (ascii - 64 + 26); return ascii > 96 ? ascii - 96 : (ascii - 64 + 26);
}).reduce(sum); }).reduce(sum);
console.log(" Day1:", day1) console.log("Day1:", day1)
const day2 = input; const day2 = input.split("\n")
.reduce((a, b, c) => {
if (c % 3 === 0) a.push([]);
a[a.length - 1].push(b);
return a;
}, []).map(group => {
const badge = group[0].split('').filter(ch => group[1].includes(ch) && group[2].includes(ch))[0];
const ascii = badge.charCodeAt(0);
return ascii > 96 ? ascii - 96 : (ascii - 64 + 26);
}).reduce(sum);
console.log("Day2:", day2); console.log("Day2:", day2);