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88 lines
4.0 KiB
88 lines
4.0 KiB
class Keypad
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MAP = [%w[ . . 1 . . ],
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%w[ . 2 3 4 . ],
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%w[ 5 6 7 8 9 ],
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%w[ . A B C . ],
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%w[ . . D . . ]]
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attr_reader :x, :y
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def initialize
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@x, @y = 0, 2
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end
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def button
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MAP[y][x]
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end
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def <<(dir)
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delta = case dir
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when ?U
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[0, 1]
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when ?D
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[0, -1]
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when ?L
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[-1, 0]
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when ?R
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[1, 0]
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else
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raise "unexpected direction: '#{dir}'"
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end
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next_x = x + delta[0]
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next_y = y - delta[1]
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next_x = [[4, next_x].min, 0].max
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next_y = [[4, next_y].min, 0].max
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@x, @y = next_x, next_y if MAP[next_y][next_x] != ?.
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end
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end
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if __FILE__ == $0
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keypad = Keypad.new
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code = DATA.read.lines.map {|line|
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line.strip.chars.each do |char|
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keypad << char
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end
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keypad.button
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}
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puts code.join
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end
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require 'minitest'
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# require 'minitest/autorun'
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class TestDay2 < Minitest::Test
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def test_day2
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keypad = Keypad.new
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assert_equal ?5, keypad.button
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'ULL'.chars.each do |char|
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keypad << char
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end
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assert_equal ?5, keypad.button
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'RRDDD'.chars.each do |char|
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keypad << char
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end
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assert_equal ?D, keypad.button
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'LURDL'.chars.each do |char|
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keypad << char
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end
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assert_equal ?B, keypad.button
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'UUUUD'.chars.each do |char|
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keypad << char
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end
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assert_equal ?3, keypad.button
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end
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end
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__END__
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RDRRDLRRUDRUUUULDDRDUULLDUULDURDDUDRULDLUDDRLRDUDDURRRRURDURLLRDRUUULDLLLURDRLLULLUULULLLDLLLRRURRLRDUULRURRUDRRDRLURLRURLLULRUURRUURDDLDRDLDLLUDUULLLUUUUDULLDRRUURLDURDDDDDRLLRRURDLUDRRUUDLRRLLRDURDUDDDLRDDRDLRULLUULRULRLLULDDRURUUDLDDULDRLLURDDUDDUDRDUDLDRRRDURRLDRDRLDLLDUDDDULULRRULRLLURDRRDDUUUUUULRUDLRRDURDLRDLUDLDURUDDUUURUDLUUULDLRDURDLDUUDLDDDURUUDUUDRLRDULLDUULUDRUDRLRRRDLLDRUDULRRUDDURLDRURRLLRRRDRLLDLULULRRUURRURLLUDRRLRULURLDDDDDURUDRRRRULLUUDLDDLUUL
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ULURUDLULDULDLLDDLLLDRRLLUDRRDRDUDURUDLRRRRUDRDDURLRRULLDLURLDULLUDDLUDURDUURRRRLDLRLDDULLRURLULLDDRUDLRRRLDRRRDLDRLLDDRRDDLUUDRUDDLULRURLDURRLLDLRUDLLRRUULUDRLLLRLDULURRRRRDDUURDRRUUDULRUULDDULRLUDLUDDULLRLRDDLRLLURRRULDLRRRUURRLDDRDLRDLRRDRDLDRDUDRDURUUDRLRRULRDLLDLLRRRDRLDRLRLRLLLURURDULUUDDRLLDDDRURRURLRDDULLRURUDRRDRLRRRLDLRLRULDRLUURRUUULRLDLLURLLLDLLLDRRDULRURRRRLUDLLRRUDLRUDRURDRRDLUUURRDLRLRUUUDURDLUDURRUUDURLUDDDULLDRDLLDDDRLDDDRLDLDDDDUDUUDURUUDULRDDLULDRDRLURLUDRDLUULLULRLULRDDRULDUDDURUURULUDLUURLURU
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URLURDDRLLURRRLDLDLUDUURDRUDLLLRRDLUUULRRLURRRLUDUDLRLDDRUDLRRRULUDUDLLLULULLLRUDULDDDLLLRRRLRURDULUDDDULDLULURRRDLURDLRLLDUDRUDURDRRURULDRDUDLLRDDDUDDURLUULLULRDRRLDDLDURLRRRLDRDLDULRULRRRLRLLDULRDLURLRUUDURRUUDLLUDRUDLRLDUUDLURRRDDUUDUDRLDLDDRURDDLLDDRDLRLRDLLLUDLUUDRLRLRDDRDLRDLLUULLLLUULLDLLDLRDLRLRRLUUDLLRLRUDRURULRLRLULUDRLLUDDUDDULRLDDRUUUURULDRRULLLDUURULUDRLLURLRRLDLRRLDDRRRDUDDUDLDDLULUDDUURDLLLRLDLRDRUUUUUDDDLDRDDRRRLRURRRRDURDRURUDLURRURDRLRUUDDLDRRULLDURDRLRRDURURUULRDUDLDRDDLULULRDRRUDDRLLRLULRLLUUDRDUUDDUDLRUUDLLUULLRUULUDDLURRRLLDRLRRLLRULLDUULURLLLLUUULDR
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LDUURULLRLDRRUUDUUUURUUUDDDURRDDLRDLLRDDRULDDUURUDDURLLUDRDUDRDULDRRRLULUDRULLLLDRLLDRDLDLLRURULUDDDDURDDDRLLUDLDRULRDLDUDDDUUDLLRLLLDLRLRLRRUDDULDDDUDLDDLUDDULDLLLLULLLLDDURDDURRRDDRLRLLUDLLUDDDUDURUDRLRDRULULDDRULDLULULLRUULRLDULUURRDRDRRDLDDDRRLUULDLUDRDDUDLRURULLDDURLDDRULUDLDDDRDRLLRDLLUURRRURDRLRURLDDLURDRURDDURLLRLRUDUUDLDUDURRDDURDRDDUDDDUDUURURDDLLRUUDDRRDULDDLLDLRULUULRUUDLLDRLULDULDDUDLULRULDRLLDUULDDDLRLLRLULDDULDDRRRLDRRLURULRDDRDLRRDUDDRDRRRRUDUDLLRRDRRURRUURDRULDDUDURLUDDURDUDRDUULLDRURUURURDRRLDDLDLUURLULRUDURDRUUURRURRDRUDRUURDURLRULULLLULDLLDLRRLDRDLUULUDDDLRDRLRLDRUDUDRLLRL
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LURLUURLURDUUDRUDLDLLURRRDLDRRRULDDRRDRDUUDRUDURDDDURLUDDLULUULRRLLRULUDRDDRRRLDURDUDDURDDDLRLDDLULLDRDDLUUDUURRRLULRUURRRRLLULDUDRDUURRRURRDRDUDUDLUDULLDLDDRLUDRURDULURLURRLLURLLLRLUURLRUDLUDDRLURRUULULRLURRURUDURDLDLDDUDDRDLLRLLRRULDDRUDURUDDDUDLLRDLRUDULLLRRRUURUDUUULLRDUDRURUDULLDLLUUUDRULRLLRRDDDDUDULDRDRLLDDLLDDDURRUDURLDLRDRUURDDURLRDRURLRRLLRLULDRRLRUDURDUURRLUUULUDDDLRLULRDRLLURRRDLURDUUDRRRLUURRLLUDLUDLUULLRRDLLRDDRURRUURLDDLRLRLRUDLDLRLRDRRDLLLRDLRDUDLLDDDRD
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