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259 lines
5.1 KiB
259 lines
5.1 KiB
class Screen
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attr_reader :width, :height, :pixels
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def initialize(width, height)
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@width, @height = width, height
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@pixels = Array.new(height) { Array.new(width, false) }
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end
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def to_s
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pixels.map {|row| row.map {|pixel| pixel ? ?# : ?. }.join }.join("\n")
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end
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def <<(instruction)
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case instruction
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when /rect (\d+)x(\d+)/
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$1.to_i.times do |x|
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$2.to_i.times do |y|
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pixels[y][x] = true
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end
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end
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when /rotate column x=(\d+) by (\d+)/
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col = pixels.map {|row| row[$1.to_i] }.rotate(-$2.to_i)
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pixels.each do |row|
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row[$1.to_i] = col.shift
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end
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when /rotate row y=(\d+) by (\d+)/
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row = pixels[$1.to_i].rotate(-$2.to_i)
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pixels[$1.to_i] = row
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end
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end
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end
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if __FILE__ == $0
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screen = Screen.new(50, 6)
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DATA.lines.each do |line|
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screen << line
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end
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puts screen
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puts screen.pixels.map {|row| row.count {|pixel| pixel }}.inject(:+)
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end
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require 'minitest'
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# require 'minitest/autorun'
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class TestScreen < Minitest::Test
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def test_screen
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screen = Screen.new(7, 3)
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assert_equal <<-PIXELS.chomp, screen.to_s
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.......
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.......
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.......
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PIXELS
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screen << 'rect 3x2'
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assert_equal <<-PIXELS.chomp, screen.to_s
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###....
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###....
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.......
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PIXELS
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screen << 'rotate column x=1 by 1'
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assert_equal <<-PIXELS.chomp, screen.to_s
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#.#....
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###....
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.#.....
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PIXELS
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screen << 'rotate row y=0 by 4'
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assert_equal <<-PIXELS.chomp, screen.to_s
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....#.#
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###....
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.#.....
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PIXELS
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screen << 'rotate column x=1 by 1'
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assert_equal <<-PIXELS.chomp, screen.to_s
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.#..#.#
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#.#....
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.#.....
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PIXELS
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end
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end
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__END__
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rect 1x1
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rotate row y=0 by 20
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rect 1x1
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rotate row y=0 by 2
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rect 1x1
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rotate row y=0 by 3
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rect 2x1
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rotate row y=0 by 2
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rect 1x1
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rotate row y=0 by 3
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rect 2x1
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rotate row y=0 by 2
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rect 1x1
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rotate row y=0 by 4
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rect 2x1
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rotate row y=0 by 2
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rect 1x1
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rotate row y=0 by 2
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rect 1x1
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rotate row y=0 by 2
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rect 1x1
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rotate row y=0 by 3
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rect 2x1
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rotate row y=0 by 2
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rect 1x1
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rotate row y=0 by 5
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rect 1x1
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rotate row y=0 by 2
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rect 1x1
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rotate row y=0 by 6
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rect 5x1
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rotate row y=0 by 2
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rect 1x3
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rotate row y=2 by 8
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rotate row y=0 by 8
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rotate column x=0 by 1
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rect 7x1
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rotate row y=2 by 24
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rotate row y=0 by 20
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rotate column x=5 by 1
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rotate column x=4 by 2
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rotate column x=2 by 2
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rotate column x=0 by 1
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rect 7x1
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rotate column x=34 by 2
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rotate column x=22 by 1
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rotate column x=15 by 1
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rotate row y=2 by 18
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rotate row y=0 by 12
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rotate column x=8 by 2
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rotate column x=7 by 1
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rotate column x=5 by 2
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rotate column x=2 by 1
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rotate column x=0 by 1
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rect 9x1
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rotate row y=3 by 28
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rotate row y=1 by 28
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rotate row y=0 by 20
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rotate column x=18 by 1
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rotate column x=15 by 1
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rotate column x=14 by 1
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rotate column x=13 by 1
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rotate column x=12 by 2
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rotate column x=10 by 3
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rotate column x=8 by 1
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rotate column x=7 by 2
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rotate column x=6 by 1
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rotate column x=5 by 1
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rotate column x=3 by 1
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rotate column x=2 by 2
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rotate column x=0 by 1
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rect 19x1
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rotate column x=34 by 2
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rotate column x=24 by 1
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rotate column x=23 by 1
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rotate column x=14 by 1
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rotate column x=9 by 2
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rotate column x=4 by 2
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rotate row y=3 by 5
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rotate row y=2 by 3
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rotate row y=1 by 7
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rotate row y=0 by 5
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rotate column x=0 by 2
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rect 3x2
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rotate column x=16 by 2
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rotate row y=3 by 27
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rotate row y=2 by 5
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rotate row y=0 by 20
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rotate column x=8 by 2
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rotate column x=7 by 1
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rotate column x=5 by 1
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rotate column x=3 by 3
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rotate column x=2 by 1
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rotate column x=1 by 2
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rotate column x=0 by 1
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rect 9x1
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rotate row y=4 by 42
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rotate row y=3 by 40
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rotate row y=1 by 30
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rotate row y=0 by 40
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rotate column x=37 by 2
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rotate column x=36 by 3
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rotate column x=35 by 1
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rotate column x=33 by 1
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rotate column x=32 by 1
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rotate column x=31 by 3
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rotate column x=30 by 1
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rotate column x=28 by 1
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rotate column x=27 by 1
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rotate column x=25 by 1
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rotate column x=23 by 3
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rotate column x=22 by 1
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rotate column x=21 by 1
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rotate column x=20 by 1
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rotate column x=18 by 1
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rotate column x=17 by 1
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rotate column x=16 by 3
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rotate column x=15 by 1
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rotate column x=13 by 1
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rotate column x=12 by 1
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rotate column x=11 by 2
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rotate column x=10 by 1
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rotate column x=8 by 1
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rotate column x=7 by 2
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rotate column x=5 by 1
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rotate column x=3 by 3
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rotate column x=2 by 1
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rotate column x=1 by 1
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rotate column x=0 by 1
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rect 39x1
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rotate column x=44 by 2
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rotate column x=42 by 2
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rotate column x=35 by 5
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rotate column x=34 by 2
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rotate column x=32 by 2
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rotate column x=29 by 2
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rotate column x=25 by 5
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rotate column x=24 by 2
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rotate column x=19 by 2
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rotate column x=15 by 4
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rotate column x=14 by 2
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rotate column x=12 by 3
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rotate column x=9 by 2
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rotate column x=5 by 5
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rotate column x=4 by 2
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rotate row y=5 by 5
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rotate row y=4 by 38
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rotate row y=3 by 10
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rotate row y=2 by 46
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rotate row y=1 by 10
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rotate column x=48 by 4
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rotate column x=47 by 3
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rotate column x=46 by 3
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rotate column x=45 by 1
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rotate column x=43 by 1
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rotate column x=37 by 5
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rotate column x=36 by 5
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rotate column x=35 by 4
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rotate column x=33 by 1
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rotate column x=32 by 5
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rotate column x=31 by 5
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rotate column x=28 by 5
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rotate column x=27 by 5
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rotate column x=26 by 3
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rotate column x=25 by 4
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rotate column x=23 by 1
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rotate column x=17 by 5
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rotate column x=16 by 5
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rotate column x=13 by 1
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rotate column x=12 by 5
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rotate column x=11 by 5
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rotate column x=3 by 1
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rotate column x=0 by 1
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