Advent of code Day 1 - Javascript while loop abuse

thomasjunkos profile image Thomas Junkツ ・1 min read

Yesterday I found a little time, to start the annual AOC.

Yes, I know, I am late to the party. But hey: Better late than never.

So, the first part was an easy warm up, just sum an array. Part 2 was a bit trickier. I came up with this - admittedly - somewhat "not clean" solution.

OTOH, I find it nonetheless readable in one way or the other.

const findDoubleFrequency = array => {
  const doubles = new Set();
  let acc = 0;
  while (
    !array.find(x => {
      acc += x;
      if (doubles.has(acc)) {
        return true;
      return false;
  ) {}
  return acc;


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