Solution for Advent of Code 2016 day 5 part 2 in Node.js

day5.js

const crypto = require('crypto');

const input = process.argv[2];

console.log(input);

let filled = [];
let remaining = 8;

for (let index = 0; remaining; index++) {
  let hash = crypto.createHash('md5');
  hash.update(input + index);
  let digest = hash.digest('hex');
  if (digest.slice(0, 5) != '00000') continue;
  let pos = +digest[5];
  if (!(pos >= 0 && pos <= 7) || filled[pos]) continue;
  filled[pos] = digest[6];
  remaining--;
}

console.log(filled.join(''));