A visualizer for the game of life

visualize_gol.rb

# =====  Game of Life visualizer  =====
# You need to fill out these three methods
# and it will visualize your game


# input:  an array of xy pairs, an xy pair is an array of 2 integers for a living cell
# output: whatever object you made to implement the game of life
def init(xy_pairs)
  cells = Array.new(200) do |y|
    Array.new(200) { |x| xy_pairs.include? [x, y] }
  end
  GameOfLife.new cells
end


# input:  whatever comes back from init/tomorrow
# output: a string representation of your world (this will be displayed)
def show(game_of_life, width, height)
  game_of_life.to_s(width, height)
  # mine didn't initially have the ability to handle such things, so I edited the bounds of the string with:
  # game_of_life.to_s.lines.take(height).map { |line| line[0...width].chomp }.join("\n")
end

# input:  whatever came back from init
# output: an object for your game in tomorrow's state
def tomorrow(game_of_life)
  game_of_life.tomorrow
end

# -----

# x, y coordinate pairs for the gosper's glider gun
game = init [
  # left_square
  [ 1, 5], [ 2, 5], [ 1, 6], [ 2, 6],

  # half_circle
  [14, 3], [13, 3], [12, 4], [11, 5], [11, 6], [11, 7], [12, 8], [13, 9], [14, 9],

  # arrow
  [16, 4], [17, 5], [15, 6], [17, 6], [18, 6], [17, 7], [16, 8],

  # frog
  [25, 1], [25, 2], [23, 2], [21, 3], [22, 3], [21, 4], [22, 4], [21, 5], [22, 5], [23, 6], [25, 6], [25, 7],

  # right_square
  [35, 3], [36, 3], [35, 4], [36, 4],
]

require 'io/console'
clear       = "\e[H\e[2J"
hide_cursor = "\e[?25l"
show_cursor = "\e[?25h"

begin
  print hide_cursor
  loop do
    height, width = $stdin.winsize
    to_display = show(game, width, height)
    print "#{clear}#{to_display.gsub(/.$/, '|')}"
    print to_display.lines.first.gsub(/./, '-')
    game = tomorrow(game)
    sleep 0.05
  end
ensure
  print show_cursor
end