day 6, advent of code 2020, using Pipe

day_6.jl

using Pipe: @pipe

getdata(file) = open(joinpath(@__DIR__, file)) do f read(f, String) end

part1(data) = @pipe data |>
              split(_, "\n\n") |>
              map(l -> replace(l, "\n" => ""), _) |>
              map(l -> split(l, ""), _) |>
              map(l -> unique(l), _) |>
              map(l -> length(l), _) |>
              sum

part2(data) = @pipe data |>
              split(_, "\n\n") |>
              map(l -> replace(l, r"\s*$" => ""), _) |>
              map(l -> split(l, "\n"), _) |>
              map(l -> reduce(intersect, l), _) |>
              map(length, _) |>
              sum

using Test

@test getdata("day_6_test.txt") |> part1 == 11
@test getdata("day_6_puzzle.txt") |> part1 == 6930
@test getdata("day_6_puzzle_2.txt") |> part2 == 6
@test getdata("day_6_puzzle.txt") |> part2 == 3585