Advent of Code Day 6

day6.js

// Pro tip: watch for google trying to auto-translate the puzzle input lol

const puzzleInput = ``

// Part 1
const parseInput = (input) => {
  return input.split(/\s\s/)
}

const groupCountAny = (group) => {
  const set = new Set(group.match(/[a-z]/g))
  return set.size
}

const partOne = (input) => {
  const groups = parseInput(input)
  const totalCount = groups.reduce((acc, group) => acc + groupCountAny(group), 0)
  console.log(totalCount)
}

partOne(puzzleInput)

// Part 2
const groupCountAll = (group) => {
  const members = group.split(/\n/).map(member => new Set(member.match(/[a-z]/g)))
  const answers = members.reduce((acc, member) => [...acc, ...member], [])
  const uniqueAnswers = [...(new Set(answers))]
  const sharedAnswers = uniqueAnswers.filter(letter => answers.filter(x => x === letter).length === members.length)
  return sharedAnswers.length
}
const partTwo = (input) => {
  const groups = parseInput(input)
  const totalCount = groups.reduce((acc, group) => acc + groupCountAll(group), 0)
  console.log(totalCount)
}

partTwo(puzzleInput)