map_to_list.rb

TYPES = {
  'c' => 'coin',
  'w' => 'wall'
}

def map_to_list(map)
  list = []

  map.strip!.gsub!(/\n\s*/, "\n")

  map.split("\n").each_with_index do |row, y|
    row.split('').each_with_index do |character, x|
      unless TYPES[character].nil?
        list << {
          x: x,
          y: y,
          type: TYPES[character]
        }
      end
    end
  end

  list
end

require "test/unit"

class TestMapMaking < Test::Unit::TestCase
  def test_map_to_list
    map = "
      wwwwwwww
      w------w
      w--cc--w
    "

    objects = [
      {x: 0, y: 0, type: 'wall'},
      {x: 1, y: 0, type: 'wall'},
      {x: 2, y: 0, type: 'wall'},
      {x: 3, y: 0, type: 'wall'},
      {x: 4, y: 0, type: 'wall'},
      {x: 5, y: 0, type: 'wall'},
      {x: 6, y: 0, type: 'wall'},
      {x: 7, y: 0, type: 'wall'},
      {x: 0, y: 1, type: 'wall'},
      {x: 7, y: 1, type: 'wall'},
      {x: 0, y: 2, type: 'wall'},
      {x: 3, y: 2, type: 'coin'},
      {x: 4, y: 2, type: 'coin'},
      {x: 7, y: 2, type: 'wall'}
    ]

    assert_equal objects, map_to_list(map)
  end
end