Day 14 - Puzzle 2

Finally got it.

Author: ariejan

lib/solutions/day_14.rb

@@ -1,9 +1,4 @@
 class Day14
-  KNOWN_TREE_PATTERN = [
-    '   #   ',
-    '  ###  ',
-    ' ##### '
-  ]
   def part_one(input, w = 101, h = 103)
     quadrants = [0, 0, 0, 0]
     wd = w / 2
@@ -36,12 +31,8 @@ def part_two(input, w = 101, h = 103)
     moves = 0
     loop do
       coords = bots.map(&:p)
-      grid = to_grid(w, h, coords)
-      bounding_box = bounding_box(coords)
 
-      pattern = extract_pattern(grid, bounding_box)
-
-      if matches_christmas_tree?(pattern)
+      if coords.size == coords.uniq.size
         puts "Found it after #{moves} moves"
         display_bots(w, h, coords)
         break
@@ -52,37 +43,6 @@ def part_two(input, w = 101, h = 103)
     end
   end
 
-  def to_grid(w, h, coords)
-    grid = Array.new(h) { Array.new(w, '.') }
-    coords.each do |x, y|
-      grid[y][x] = '#'
-    end
-    grid
-  end
-
-  def bounding_box(coords)
-    x_values = coords.map { |x, _| x }
-    y_values = coords.map { |_, y| y }
-
-    [x_values.min, y_values.min, x_values.max, y_values.max]
-  end
-
-  def extract_pattern(grid, bounding_box)
-    x_min, y_min, x_max, y_max = bounding_box
-    pattern = []
-    (y_min..y_max).each do |y|
-      row = grid[y][x_min..x_max].join
-      pattern << row
-    end
-    pattern
-  end
-
-  def matches_christmas_tree?(pattern)
-    pattern[0].count('#') == 1 &&
-      (pattern[1].count('#') == 2 || pattern[1].count('#') == 3) &&
-      (pattern[1].count('#') == 2 || pattern[1].count('#') == 5)
-  end
-
   def display_bots(w, h, coords)
     grid = Array.new(h) { Array.new(w, '.') }
     coords.each do |x, y|

spec/solutions/day_14_spec.rb

@@ -35,10 +35,4 @@
       expect(subject.part_one(input, 11, 7)).to eq(12)
     end
   end
-
-  describe '#part_two' do
-    it 'calculates the correct solutions for part two' do
-      expect(subject.part_two(input)).to eq(0)
-    end
-  end
 end