Day 1: Report RepairDay 3: Toboggan TrajectoryDay 4: Passport ProcessingDay 5: Binary BoardingDay 6: Custom CustomsDay 7: Handy HaversacksDay 8: Handheld HaltingDay 9: Encoding ErrorDay 10: Adapter ArrayDay 11: Seating SystemDay 12: Rain RiskDay 13: Shuttle SearchDay 14: Docking DataDay 15: Rambunctious RecitationDay 16: Ticket TranslationDay 17: Conway CubesDay 18: Operation OrderDay 19: Monster MessagesDay 25: Combo BreakerAdvent of Code Leaderboard 2020
Day 2: Password Philosophy
positions = input.trim().split('\n')
.flatMap((line) => {
const [, password] = line.match(/: (\w+)/)
return password.split('').map((letter, position) => ({letter, position: position + 1}))
})
part1 = input.trim().split('\n').filter((line) => {
const [, min, max, letter, password] = line.match(/(\d+)-(\d+) (\w): (.*)/)
const count = password.split('').filter(c => c === letter).length
return min <= count && count <= max
}).length
part2 = input.trim().split('\n').filter((line) => {
const [, i, j, letter, password] = line.match(/(\d+)-(\d+) (\w): (.*)/)
const letters = password.split('')
return (letters[i - 1] === letter) ^ (letters[j - 1] === letter)
}).length
import { vl } from '@vega/vega-lite-api'
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