[2023][ruby][14.x] clean up part one

main
Alpha Chen 1 year ago
parent 74bf4a5213
commit 16677ad6a4
Signed by: alpha
SSH Key Fingerprint: SHA256:3fOT8fiYQG/aK9ntivV3Bqtg8AYQ7q4nV6ZgihOA20g

@ -1,14 +1,5 @@
input = ARGF.readlines(chomp: true).map(&:chars)
# part one
p input.transpose
.map {|col| col.chunk_while { [_1, _2].tally.fetch(?#, 0).even? }}
.map {|col| col.flat_map { _1.sort.reverse }}
.transpose
.reverse
.each.with_index
.sum {|row, i| row.count(?O) * (i+1) }
# always tilts left
def tilt(platform)
platform
@ -16,6 +7,15 @@ def tilt(platform)
.map {|row| row.flat_map { _1.sort.reverse }}
end
def load(platform)
platform.reverse
.each.with_index
.sum {|row, i| row.count(?O) * (i+1) }
end
# part one
p load(tilt(input.transpose).transpose)
def spin_cycle(platform)
return enum_for(__method__, platform) unless block_given?
@ -41,6 +41,7 @@ spin = spin_cycle(input)
seen = {}
(1_000_000_000).times do |i|
platform = spin.next
if seen.has_key?(platform.hash)
start, _ = seen.fetch(platform.hash)
i = (1_000_000_000 - start) % (i+1 - start) + start
@ -48,9 +49,6 @@ seen = {}
exit
end
load = platform.reverse
.each.with_index
.sum {|row, i| row.count(?O) * (i+1) }
seen[platform.hash] = [i+1, load]
seen[platform.hash] = [i+1, load(platform)]
end

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